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Mohammad L, Al Naeem W, Ramsi M, Al Neyadi S, Abdullahi A, Rahma A, Dawoud TH. Haemodynamic effects of intravenous acetaminophen in critically ill paediatric patients: a retrospective chart review. Eur J Hosp Pharm 2024:ejhpharm-2023-004048. [PMID: 38580429 DOI: 10.1136/ejhpharm-2023-004048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/19/2024] [Indexed: 04/07/2024] Open
Abstract
OBJECTIVES Haemodynamic changes following intravenous acetaminophen are well studied in adults. Limited data are published in critically ill paediatric patients, especially from the Middle East. We aim to investigate haemodynamic effects and incidence of hypotension with intravenous acetaminophen in critically ill children, with a focus on understanding factors influencing these effects. METHODS We retrospectively reviewed patients who received intravenous acetaminophen between July and December 2022. A haemodynamic event was defined as drop of >15% in systolic blood pressure (SBP) or mean arterial blood pressure (MAP) within 120 min after drug administration. Hypotension was defined as either drop in SBP below the 5th percentile for age, or a haemodynamic event associated with tachycardia, increased lactate or treatment with fluid/vasopressors. Logistic regression was performed to quantify relationships between patients' characteristics and the occurrence of haemodynamic event and hypotension. RESULTS A haemodynamic event was observed in 50/156 patients (32%) post-acetaminophen. Mean MAP (SD) before and after acetaminophen was 69.6 mm Hg (14.8) and 67.4 mm Hg (13.9), respectively (p=0.001). Mean SBP (SD) before and after acetaminophen was 95.4 mm Hg (18.2) and 92.8 mm Hg (19.2), respectively (p=0.006). Baseline MAP, median (interquartile range (IQR)) was 76.0 (64.0-85.3) and 66.0 (57.0-74.5) in patients with and without haemodynamic events, respectively (p=0.004). Only 38/156 patients (24%) met the definition for hypotension. Baseline MAP, median (IQR) was 62.0 (51.8-79.0) in patients with, and 68.5 (62.0, 79.3) in patients without hypotension (p=0.036). Baseline shock, vasoactives, mechanical ventilation and paediatric sequential organ failure assessment were not significantly associated with hypotension. Only MAP was found to be associated with both haemodynamic event (adjusted odds ratio (AOR) 1.05, 95% CI 1.02-1.10) and hypotension (AOR 1.06, 95% CI 1.02-1.10) even after controlling for other confounders. CONCLUSIONS Administration of intravenous acetaminophen in critically ill children can lead to haemodynamic changes, including clinically significant hypotensive events.
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Affiliation(s)
- Lana Mohammad
- Pharmacy, Shaikh Khalifa Medical City, Abu Dhabi, UAE
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Abramoff KJ, De Souza LL, Maloney SK, Davis EA, Jones TW, Fournier PA. Effect of Neck-Deep Immersion in Cool or Thermoneutral Water on Blood Glucose Levels in Individuals With Type 1 Diabetes. J Endocr Soc 2023; 7:bvad128. [PMID: 37942293 PMCID: PMC10628817 DOI: 10.1210/jendso/bvad128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Indexed: 11/10/2023] Open
Abstract
Context It is unclear whether immersion in cool water, typical of many beaches, increases the concentration of blood glucose in individuals with type 1 diabetes mellitus (T1DM). Objective To test the hypothesis in individuals with T1DM that immersion neck-deep in cool water (COOL) causes an increase in blood glucose concentration, but not exposure to thermoneutral water (THERMO) or thermoneutral air. Methods Eight overnight-fasted participants with T1DM were exposed for 60 minutes on separate days to 3 experimental conditions: cool water (COOL, 23 °C); thermoneutral water (THERMO, 33.5 °C); or thermoneutral air (24 °C). They then recovered for 60 minutes on land at 24 °C. At time intervals, we measured: blood glucose and plasma insulin concentration, rate of carbohydrate and fat oxidation, skin and core temperature, subcutaneous blood flow, and shivering via electromyography. Results There was no change in blood glucose concentration during the 3 experimental conditions (P > .05). During recovery after COOL, blood glucose increased (P < .05) but did not change in the other 2 conditions. The rate of carbohydrate oxidation during and early after COOL was higher than in the other 2 conditions (P < .05), and COOL led to a decrease in subcutaneous blood flow and the concentration of plasma insulin (P < .05). Conclusion Cool or thermoneutral neck-deep immersion in water does not cause a change in the concentration of blood glucose in people with T1DM, but on-land recovery from COOL causes an increase in blood glucose that may be due, at least in part, to the accompanying decrease in plasma insulin.
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Affiliation(s)
- Kristina J Abramoff
- Department of Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Department of Anatomy Physiology and Human Biology, School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Children's Diabetes Centre, Telethon Kids Institute, Nedlands, WA 6009, Australia
| | - Lauren L De Souza
- Department of Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Shane K Maloney
- Department of Anatomy Physiology and Human Biology, School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Elizabeth A Davis
- Children's Diabetes Centre, Telethon Kids Institute, Nedlands, WA 6009, Australia
| | - Timothy W Jones
- Children's Diabetes Centre, Telethon Kids Institute, Nedlands, WA 6009, Australia
| | - Paul A Fournier
- Department of Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Children's Diabetes Centre, Telethon Kids Institute, Nedlands, WA 6009, Australia
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3
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Ibrahim T, Gebril A, Nasr MK, Samad A, Zaki HA. Unlocking the Optimal Analgesic Potential: A Systematic Review and Meta-Analysis Comparing Intravenous, Oral, and Rectal Paracetamol in Equivalent Doses. Cureus 2023; 15:e41876. [PMID: 37581156 PMCID: PMC10423591 DOI: 10.7759/cureus.41876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2023] [Indexed: 08/16/2023] Open
Abstract
Paracetamol (acetaminophen) is an extensively used analgesic for acute and chronic pain management. Currently, paracetamol is manufactured for oral, rectal, and intravenous (IV) use. Research has shown varied results on the analgesic properties of IV paracetamol compared to oral and rectal paracetamol; however, research on the same doses of paracetamol is limited. Therefore, this review was constructed to explore the analgesic properties of IV paracetamol compared with oral and rectal paracetamol administered in equivalent doses. A broad and thorough literature search was performed on five electronic databases, including PubMed, ScienceDirect, Medline, Scopus, and Google Scholar. Statistical analysis of all outcomes in our review was then performed using the Review Manager software. Outcomes were categorized as primary (pain relief and time to request rescue analgesia) and secondary (adverse events after analgesia). An extensive quality appraisal was also done using the Review Manager software's Cochrane risk of bias tool. The literature survey yielded 2,945 articles, of which 12 were used for review and analysis. The pooled analysis for patients undergoing surgical procedures showed that IV paracetamol had statistically similar postoperative pain scores at two (mean difference (MD) = -0.14; 95% confidence interval (CI) -0.58-0.29; p = 0.51), 24 (MD = 0.09; 95% CI = -0.02-0.21; p = 0.12), and 48 (MD = 0.04; 95% CI = -0.08-0.16; p = 0.52) hours as oral paracetamol. Similarly, the data on time to rescue analgesia showed no considerable difference between the IV and oral paracetamol groups (MD = -1.58; 95% CI = -5.51-2.35; p = 0.43). On the other hand, the pooled analysis for patients presenting non-surgical acute pain showed no significant difference in the mean pain scores between patients treated with IV and oral paracetamol (MD = -0.35; 95% CI = -2.19-1.48; p = 0.71). Furthermore, a subgroup analysis of analgesia-related adverse events showed that the incidences of vomiting/nausea and pruritus did not differ between patients receiving IV and oral paracetamol (odds ratio (OR) = 0.71; 95% CI = 0.45-1.11; p = 0.13 and OR = 0.48; 95% CI = 0.18-1.29; p = 0.05, respectively). A review of information from two trials comparing equal doses of IV and rectal paracetamol suggested that the postoperative pain scores were statistically similar between the groups. IV paracetamol is not superior to oral or rectal paracetamol administered in equal doses. Therefore, we cannot recommend or refute IV paracetamol as the first-line analgesia for acute and postoperative pain.
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Affiliation(s)
| | - Amr Gebril
- Emergency Medicine, NMC Royal Hospital, Khalifa City, ARE
| | - Mohammed K Nasr
- Emergency Medicine, Dr. Sulaiman Al Habib Hospital, Dubai, ARE
| | - Abdul Samad
- Acute Medicine/Emergency, NMC Royal Hospital, Khalifa City, ARE
| | - Hany A Zaki
- Emergency Medicine, Hamad Medical Corporation, Doha, QAT
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Bergström A, Lipcsey M, Larsson A, Yang B, Engblom D, Chew MS, Elander L. ACETAMINOPHEN ATTENUATES PULMONARY VASCULAR RESISTANCE AND PULMONARY ARTERIAL PRESSURE AND INHIBITS CARDIOVASCULAR COLLAPSE IN A PORCINE MODEL OF ENDOTOXEMIA. Shock 2023; 59:442-448. [PMID: 36597769 DOI: 10.1097/shk.0000000000002061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
ABSTRACT Acetaminophen (paracetamol) is often used in critically ill patients with fever and pain; however, little is known about the effects of acetaminophen on cardiovascular function during systemic inflammation. Here, we investigated the effect of acetaminophen on changes in the systemic and pulmonary circulation induced by endotoxin (0.5 μg/kg per hour) in anesthetized pigs. Endotoxin infusion led to a rapid increase in pulmonary artery pressure and pulmonary vascular resistance index. Acetaminophen delayed and attenuated this increase. Furthermore, acetaminophen reduced tachycardia and decreased stroke volume, accompanied by systemic inflammation, without affecting inflammatory parameters such as white blood cell count and TNF-α in blood. As a proof of concept, we injected a high dose of endotoxin (100 μg), which induced rapid cardiovascular collapse in pigs. Pigs treated with acetaminophen survived with no obvious hemodynamic instability during the 50-min observation period. In conclusion, acetaminophen attenuates the effects of endotoxin on pulmonary circulation in anesthetized pigs. This may play a role in severe systemic inflammation.
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Affiliation(s)
| | | | - Anders Larsson
- Clinical Chemistry, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Bei Yang
- Centre for Clinical Research Sörmland, Uppsala University, Uppsala, Sweden
| | - David Engblom
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
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Thibault C, Pelletier É, Nguyen C, Trottier ED, Doré-Bergeron MJ, DeKoven K, Roy AM, Piché N, Delisle JF, Morin C, Paquette J, Kleiber N. The Three W's of Acetaminophen In Children: Who, Why, and Which Administration Mode. J Pediatr Pharmacol Ther 2023; 28:20-28. [PMID: 36777982 PMCID: PMC9901322 DOI: 10.5863/1551-6776-28.1.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 04/25/2022] [Indexed: 02/05/2023]
Abstract
Acetaminophen is one of the oldest medications commonly administered in children. Its efficacy in treating fever and pain is well accepted among clinicians. However, the available evidence supporting the use of acetaminophen's different modes of administration remains relatively scarce and poorly known. This short report summarizes the available evidence and provides a framework to guide clinicians regarding a rational use of acetaminophen in children.
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Affiliation(s)
- Céline Thibault
- Department of Pharmacology and Physiology (CT, NK), Université de Montreal, Montreal, QC, Canada,Research Center (CT, NK), CHU Sainte-Justine, Université de Montreal, Montreal, QC, Canada,Department of Pediatrics (CT, MJDB, NK), CHU Sainte-Justine, Montreal, QC, Canada,Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada
| | - Élaine Pelletier
- Department of Pharmacology and Physiology (CT, NK), Université de Montreal, Montreal, QC, Canada,Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Pharmacy (EP, CN, JFD, CM), CHU Sainte-Justine, Montreal, QC, Canada
| | - Christina Nguyen
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Pharmacy (EP, CN, JFD, CM), CHU Sainte-Justine, Montreal, QC, Canada
| | - Evelyne D. Trottier
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Pediatric Emergency Medicine (EDT), CHU Sainte Justine, Montreal, QC, Canada
| | - Marie-Joëlle Doré-Bergeron
- Department of Pediatrics (CT, MJDB, NK), CHU Sainte-Justine, Montreal, QC, Canada,Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada
| | - Kathryn DeKoven
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Anesthesiology (KD), CHU Sainte-Justine, Montreal, QC, Canada
| | - Anne-Marie Roy
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Nursing (AMR, JP), CHU Sainte-Justine, Montreal, QC, Canada
| | - Nelson Piché
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada
| | - Jean-Francois Delisle
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Pharmacy (EP, CN, JFD, CM), CHU Sainte-Justine, Montreal, QC, Canada
| | - Caroline Morin
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Pharmacy (EP, CN, JFD, CM), CHU Sainte-Justine, Montreal, QC, Canada
| | - Julie Paquette
- Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Nursing (AMR, JP), CHU Sainte-Justine, Montreal, QC, Canada
| | - Niina Kleiber
- Department of Pharmacology and Physiology (CT, NK), Université de Montreal, Montreal, QC, Canada,Research Center (CT, NK), CHU Sainte-Justine, Université de Montreal, Montreal, QC, Canada,Groupe de Gouvernance des Analgésiques (CT, EP, CN, EDT, MJDB, KD, AMR, NP, JFD, CM, JP, NK), Pharmacology Committee, CHU Sainte-Justine, Montreal, QC, Canada,Department of Surgery (NP), CHU Sainte-Justine, Montreal, QC, Canada
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Correia MC, Santos ESA, Neves BJ, Rocha ML. Acetaminophen treatment evokes anticontractile effects in rat aorta by blocking L-type calcium channels. Pharmacol Rep 2022; 74:493-502. [PMID: 35438421 DOI: 10.1007/s43440-022-00367-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Acetaminophen (APAP) is the most widely used analgesic and antipyretic in the world. However, in high or continuous doses, it can cause serious side effects including blood pressure variability and cardiovascular injuries, which are barely explored. This study aimed to evaluate the acute effect of APAP treatment on vascular tone focused on the blocking of Ca2+ channels. METHODS Rats were treated with APAP orally by gavage (500 mg/kg/single dose). After 12 h, the aorta was isolated for vascular reactivity studies in an isolated organ bath. Vascular contraction and relaxation were measured after different stimuli. Moreover, molecular docking studies were performed to evaluate the action of NAPQI (APAP metabolite) on L-type calcium channels. RESULTS Phenylephrine-induced maximal vascular contraction was reduced in the APAP group (138.4 ± 9.2%) compared to the control group (172.2 ± 11.1%). APAP treatment significantly reduced contraction induced by Ca2+ influx stimulated with phenylephrine or KCl and reduced contraction mediated by Ca2+ released from the sarcoplasmic reticulum induced by caffeine. There was no difference in vascular relaxation induced by acetylcholine or sodium nitroprusside. Computational molecular docking demonstrated that NAPQI is capable of blocking L-type Ca2+ channels (Cav1.2), which would limit the influx of Ca2+. CONCLUSION These results suggest that APAP treatment causes an anticontractile effect in rat aorta, possibly by blocking the influx of Ca2+ through L-type channels (Cav1.2).
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Affiliation(s)
- Mikaelle C Correia
- Laboratory of Pharmacology, UFG, Faculty of Pharmacy, Federal University of Goias, Setor Leste Universitário, CEP, Rua 240, esquina com 5ª Avenida, s/n, Goiânia, GO, 74605-170, Brazil
| | - Eder S A Santos
- LabMol-Laboratory for Molecular Modeling and Drug Design, Faculty of Pharmacy, Federal University of Goias, Rua 240, esquina com 5ª Avenida, s/n, Setor Leste Universitário, Goiânia, GO, 74605-170, Brazil
| | - Bruno J Neves
- LabMol-Laboratory for Molecular Modeling and Drug Design, Faculty of Pharmacy, Federal University of Goias, Rua 240, esquina com 5ª Avenida, s/n, Setor Leste Universitário, Goiânia, GO, 74605-170, Brazil
| | - Matheus L Rocha
- Laboratory of Pharmacology, UFG, Faculty of Pharmacy, Federal University of Goias, Setor Leste Universitário, CEP, Rua 240, esquina com 5ª Avenida, s/n, Goiânia, GO, 74605-170, Brazil.
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Lee E, Song YJ, Jeon S, Lee J, Lee E, Lee JY, Lee E, Han MK, Jeong HG. Risk Factors for Intravenous Propacetamol-Induced Blood Pressure Drop in the Neurointensive Care Unit: A Retrospective Observational Study. Neurocrit Care 2021; 36:888-896. [PMID: 34791593 DOI: 10.1007/s12028-021-01390-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 10/25/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Intravenous propacetamol is commonly used to control fever and pain in neurocritically ill patients in whom oral administration is often difficult. However, several studies reported that intravenous propacetamol may cause blood pressure drop. Thus, we aimed to investigate the occurrence and risk factors for intravenous propacetamol-induced blood pressure drop in neurocritically ill patients. METHODS This retrospective study included consecutive patients who were administered intravenous propacetamol in a neurointensive care unit at a single tertiary academic hospital between April 2013 and June 2020. The exact timing of intravenous propacetamol administration was collected from a database of the electronic barcode medication administration system. Blood pressure drop was defined as a systolic blood pressure below 90 mm Hg or a decrease by 30 mm Hg or more. Blood pressure, pulse rate, and body temperature were collected at baseline and within 2 h after intravenous propacetamol administration. The incidence of blood pressure drop was evaluated, and multivariable logistic regression analysis was performed to identify risk factors for blood pressure drop events. RESULTS A total of 16,586 instances of intravenous propacetamol administration in 4916 patients were eligible for this study. Intravenous propacetamol resulted in a significant decrease in systolic blood pressure (baseline 131.1 ± 17.8 mm Hg; within 1 h 124.6 ± 17.3 mm Hg; between 1 and 2 h 123.4 ± 17.4 mm Hg; P < 0.01). The incidence of blood pressure drop events was 13.5% within 2 h after intravenous propacetamol. Older age, lower or higher baseline systolic blood pressure, fever, higher Acute Physiology and Chronic Health Evaluation II score, and concomitant administration of vasopressors/inotropes or analgesics/sedatives were significant factors associated with the occurrence of blood pressure drop events after intravenous propacetamol administration. CONCLUSIONS Intravenous propacetamol can induce hemodynamic changes and blood pressure drop events in neurocritically ill patients. This study identified the risk factors for blood pressure drop events. On the basis of our results, judicious use of intravenous propacetamol is warranted for neurocritically ill patients with risk factors that make them more susceptible to hemodynamic changes.
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Affiliation(s)
- Eunah Lee
- Department of Pharmacy, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seoungnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Young Joo Song
- Department of Pharmacy, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seoungnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Sujeong Jeon
- Department of Pharmacy, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seoungnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Junghwa Lee
- Department of Pharmacy, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seoungnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Eunsook Lee
- Department of Pharmacy, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seoungnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Ju-Yeun Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Euni Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Moon-Ku Han
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam-si, 08826, Republic of Korea
| | - Han-Gil Jeong
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam-si, 08826, Republic of Korea. .,Division of Neurocritical Care, Department of Neurosurgery and Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82 Gumi-ro 173 beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea.
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Weinberg L, Chiam E, Karp J, Churilov L, Bellomo R. The hemodynamic effects of intravenous paracetamol (acetaminophen) in patients with chronic liver disease undergoing liver transplantation: a pilot study. BMC Res Notes 2021; 14:325. [PMID: 34429149 PMCID: PMC8383248 DOI: 10.1186/s13104-021-05749-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 08/18/2021] [Indexed: 12/04/2022] Open
Abstract
OBJECTIVE We performed a single-center double-blinded, randomized trial to investigate the hemodynamic effects of IV paracetamol in patients with chronic liver disease (CLD) undergoing liver transplantation surgery. Patients with CLD are particularly susceptible to hemodynamic derangements given their low systemic vascular resistance state. Accordingly, hypotension is common in this setting. The hemodynamic effects of IV paracetamol in patients undergoing elective liver transplantation are unknown, therefore we evaluated whether the intraoperative administration of IV paracetamol in patients with chronic liver disease undergoing liver transplantation results in adverse hemodynamic effects. The primary end point was a change in systolic blood pressure 30-min after the preoperative infusion. RESULTS Twenty-four participants undergoing liver transplantation surgery were randomly assigned to receive a single bolus of IV paracetamol (1 g paracetamol + 3.91 g mannitol per 100 mL) (n = 12) or placebo (0.9% Saline 100 mL) (n = 12). All participants completed their study intervention, and there were no breaches or violations of the trial protocol. Baseline characteristics were similar in both groups. There were no significant differences regarding surgical duration, intraoperative use of fluids, and intraoperative noradrenaline use. After the administration of paracetamol there were no significant differences observed in blood pressure or other hemodynamic parameters when compared to placebo.
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Affiliation(s)
- Laurence Weinberg
- Department of Anesthesia, Austin Health, Studley Rd, Heidelberg, VIC Australia
- Department of Surgery, The University of Melbourne, Austin Health, Victoria, Australia
| | - Elizabeth Chiam
- Department of Anesthesia, Austin Health, Studley Rd, Heidelberg, VIC Australia
| | - Jadon Karp
- Monash School of Medicine, Monash University, Victoria, Australia
| | - Leonid Churilov
- Department of Medicine (Austin Health) and Melbourne Brain Centre at Royal Melbourne Hospital, Melbourne Medical School, Parkville, Australia
- Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Rinaldo Bellomo
- Department of Intensive Care, Austin Hospital, Heidelberg, VIC Australia
- Department of Critical Care, The Univesity of Melbourne, Victoria, Australia
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Young TL. A narrative review of paracetamol-induced hypotension: Keeping the patient safe. Nurs Open 2021; 9:1589-1601. [PMID: 34102027 PMCID: PMC8994964 DOI: 10.1002/nop2.943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/01/2021] [Accepted: 04/28/2021] [Indexed: 12/21/2022] Open
Abstract
Aim To understand the prevalence and epidemiology of paracetamol‐induced hypotension and clinical implications for contemporaneous practice. Design Narrative review. Methods In May and June 2020, an open‐date literature search of English publications indexed in ProQuest, PubMed, and EBSCO was conducted with the search terms ‘acetaminophen’ and ‘hypotension’ and related search combinations (‘paracetamol’, ‘propacetamol’, ‘low blood pressure’, ‘fever’, ‘sepsis’, and ‘shock’) to identify peer‐reviewed publications of blood pressure changes after paracetamol administration in humans. Results A pattern of blood pressure reduction following the administration of paracetamol is demonstrated in the 27 studies included in this review. Haemodynamic intervention often followed persistent blood pressure reduction, and was greatest in febrile critically ill patients who received parenteral paracetamol.
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Affiliation(s)
- Tricia L Young
- Australia and Bairnsdale Regional Health Service, University of New England, Armadale, VIC, Australia
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10
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Bravo M, Bakal O, Rivas E, Mascha EJ, Pu X, Mosteller L, Rodriguez-Patarroyo F, Essber H, AlGharrash A, Turan A. Effect of Intravenous Acetaminophen on Mean Arterial Blood Pressure: A Post Hoc Analysis of the EFfect of Intravenous ACetaminophen on PosToperative HypOxemia After Abdominal SurgeRy Trial. Anesth Analg 2021; 133:1532-1539. [PMID: 33856395 DOI: 10.1213/ane.0000000000005429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Acetaminophen is commonly used as part of multimodal analgesia for acute pain. The intravenous formulation offers a more predictable bioavailability compared to oral and rectal acetaminophen. There have been reports of hypotension with intravenous acetaminophen attributable to centrally mediated and vasodilatory effects. We tested the hypothesis that in adults having abdominal surgery the use of intravenous acetaminophen versus placebo for postoperative pain management is associated with a decrease in mean arterial pressure (MAP) after its administration. METHODS This is a substudy of eFfect of intravenous ACetaminophen on posToperative hypOxemia after abdominal surgeRy (FACTOR) trial (NCT02156154). FACTOR trial randomly assigned adults undergoing abdominal surgery to either 1 g of acetaminophen or placebo every 6 hours during the first postoperative 48 hours. Continuous monitoring of blood pressure was obtained by noninvasive ViSi Mobile device (Sotera Wireless, Inc, San Diego, CA) at 15-second intervals during initial 48 hours postoperatively. We excluded patients without continuous monitoring data available. The primary outcome was the MAP difference between MAP 5 minutes before study drug administration (baseline) and MAP 30 minutes poststudy drug administration initiation. We used a linear mixed effects model to assess the treatment effect on MAP change. The secondary outcome was MAP area under baseline (AUB) during the 30 minutes after treatment. In a sensitivity analysis of change in MAP from predrug to postdrug administration, we instead used postdrug MAP as the outcome adjusting for the baseline MAP in the model. RESULTS Among 358 patients analyzed, 182 received acetaminophen and 176 placebo. The mean (standard deviation [SD]) of average MAP change was -0.75 (5.9) mm Hg for the treatment and 0.32 (6.3) mm Hg for the placebo. Acetaminophen was found to decrease the MAP from baseline more than placebo after drug administration. The estimated difference in mean change of MAP was -1.03 (95% confidence interval [CI] -1.60 to -0.47) mm Hg; P < .001. The sensitivity analysis showed postoperative MAP in the acetaminophen group was 1.33 (95% CI, 0.76-1.90) mm Hg lower than in the placebo group (P < .001). The median of MAP AUB was 33 [Q1 = 3.3, Q3 = 109] mm Hg × minutes for the treatment and 23 [1.6, 79] mm Hg × minutes for the placebo. Acetaminophen was found to increase the AUB with an estimated median difference of 15 (95% CI, 5-25) mm Hg × minutes (P = .003). CONCLUSIONS Intravenous acetaminophen decreases MAP after its administration. However, this decrease does not appear to be clinically meaningful. Clinicians should not refrain to use intravenous acetaminophen for acute pain management because of worries of hypotension.
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Affiliation(s)
- Mauro Bravo
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio
| | - Omer Bakal
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio
| | - Eva Rivas
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio.,Department of Anesthesia, Hospital Clinic of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universidad de Barcelona, Barcelona, Spain
| | - Edward J Mascha
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio.,Department of Quantitative Health Sciences
| | - Xuan Pu
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio.,Department of Quantitative Health Sciences
| | - Lauretta Mosteller
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio
| | | | - Hani Essber
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio
| | - Ahmed AlGharrash
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio
| | - Alparslan Turan
- From the Department of Outcomes Research, Cleveland Clinic, Cleveland, Ohio.,Department of General Anesthesiology, Cleveland Clinic, Cleveland, Ohio
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11
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Fever: Could A Cardinal Sign of COVID-19 Infection Reduce Mortality? Am J Med Sci 2021; 361:420-426. [PMID: 33781387 PMCID: PMC7833112 DOI: 10.1016/j.amjms.2021.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 10/10/2020] [Accepted: 01/08/2021] [Indexed: 11/20/2022]
Abstract
With mortality rising from the COVID-19 pandemic, we may be overlooking a key aspect of the immunological response. Fever is a cardinal sign of this rampant infection; however, little attention has been paid towards how a fever may work in our favor in overcoming this disease. Three key aspects of patient care - fever, fluid, and food - can be harmonized to overcome COVID-19 infection. Both animal and human studies have demonstrated that fever suppression during viral infections, either through low ambient temperatures or antipyretic use, may increase morbidity and prolong the illness. As fever rises, so do antidiuretic hormone levels, leading to solute-free water retention - making conservative fluid management essential. Finally, fever inhibits gastrointestinal function as energy is reallocated to the immunological response, underscoring the need to work in concert with these physiological changes. An opportunity awaits to investigate this natural barrier to infection, let us not pass it by.
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12
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Kim SY, Lee CH, Lee SJ, Shin BS, Kang HG. Aggravation of Acute Ischemic Stroke with Cerebral Hypoperfusion after Intravenous Propacetamol. J Clin Neurol 2021; 17:473-475. [PMID: 34184457 PMCID: PMC8242320 DOI: 10.3988/jcn.2021.17.3.473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 11/17/2022] Open
Affiliation(s)
- Sang Yeon Kim
- Department of Neurology, Jeonbuk National University Hospital, Jeonju, Korea
| | - Chan Hyuk Lee
- Department of Neurology, Jeonbuk National University Hospital, Jeonju, Korea.,Department of Neurology, Research Institute of Clinical Medicine of Jeonbuk National University, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Seung Jae Lee
- Institute for Molecular Biology and Genetics and Department of Chemistry, Jeonbuk National University, Jeonju, Korea
| | - Byoung Soo Shin
- Department of Neurology, Jeonbuk National University Hospital, Jeonju, Korea.,Department of Neurology, Research Institute of Clinical Medicine of Jeonbuk National University, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Hyun Goo Kang
- Department of Neurology, Jeonbuk National University Hospital, Jeonju, Korea.,Department of Neurology, Research Institute of Clinical Medicine of Jeonbuk National University, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.
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13
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van der Horst J, Manville RW, Hayes K, Thomsen MB, Abbott GW, Jepps TA. Acetaminophen (Paracetamol) Metabolites Induce Vasodilation and Hypotension by Activating Kv7 Potassium Channels Directly and Indirectly. Arterioscler Thromb Vasc Biol 2020; 40:1207-1219. [PMID: 32188278 DOI: 10.1161/atvbaha.120.313997] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Intravenous acetaminophen/paracetamol (APAP) is well documented to cause hypotension. Since the patients receiving intravenous APAP are usually critically ill, any severe hemodynamic changes, as with those associated with APAP, can be life-threatening. The mechanism underlying this dangerous iatrogenic effect of APAP was unknown. Approach and Results: Here, we show that intravenous APAP caused transient hypotension in rats, which was attenuated by the Kv7 channel blocker, linopirdine. APAP metabolite N-acetyl-p-benzoquinone imine caused vasodilatation of rat mesenteric arteries ex vivo. This vasodilatation was sensitive to linopirdine and also the calcitonin gene-related peptide antagonist, BIBN 4096. Further investigation revealed N-acetyl-p-benzoquinone imine stimulates calcitonin gene-related peptide release from perivascular nerves, causing a cAMP-dependent activation of Kv7 channels. We also show that N-acetyl-p-benzoquinone imine enhances Kv7.4 and Kv7.5 channels overexpressed in oocytes, suggesting that it can activate Kv7.4 and Kv7.5 channels directly, to elicit vasodilatation. CONCLUSIONS Direct and indirect activation of Kv7 channels by the APAP metabolite N-acetyl-p-benzoquinone imine decreases arterial tone, which can lead to a drop in blood pressure. Our findings provide a molecular mechanism and potential preventive intervention for the clinical phenomenon of intravenous APAP-dependent transient hypotension.
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Affiliation(s)
- Jennifer van der Horst
- From the Vascular Biology Group, Department of Biomedical Science (J.v.d.H., K.H., T.A.J.), University of Copenhagen, Denmark
| | - Rian W Manville
- Bioelectricity Laboratory, Department of Physiology and Biophysics, School of Medicine, University of California, Irvine (R.W.M., G.W.A.)
| | - Katie Hayes
- From the Vascular Biology Group, Department of Biomedical Science (J.v.d.H., K.H., T.A.J.), University of Copenhagen, Denmark
| | - Morten B Thomsen
- Cardiac Electrophysiology Group, Department of Biomedical Science (M.B.T.), University of Copenhagen, Denmark
| | - Geoffrey W Abbott
- Bioelectricity Laboratory, Department of Physiology and Biophysics, School of Medicine, University of California, Irvine (R.W.M., G.W.A.)
| | - Thomas A Jepps
- From the Vascular Biology Group, Department of Biomedical Science (J.v.d.H., K.H., T.A.J.), University of Copenhagen, Denmark
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14
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Nahum E, Weissbach A, Kaplan E, Kadmon G. Hemodynamic effects of intravenous paracetamol in critically ill children with septic shock on inotropic support. J Intensive Care 2020; 8:14. [PMID: 32015882 PMCID: PMC6988254 DOI: 10.1186/s40560-020-0430-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/15/2020] [Indexed: 12/13/2022] Open
Abstract
Background Treatment with intravenous paracetamol may impair hemodynamics in critically ill adults. Few data are available in children. The aim of this study was to investigate the frequency, extent, and risk factors of hypotension following intravenous paracetamol administration in children with septic shock on inotropic support. Methods We retrospectively reviewed the electronic medical charts of all children aged 1 month to 18 years with septic shock who were treated with intravenous paracetamol while on inotropic support at the critical care unit of a tertiary pediatric medical center in 2013–2018. Data were collected on patient demographics, underlying disease, Pediatric Logistic Organ Dysfunction (PELOD) score, hemodynamic parameters before and up to 120 min after paracetamol administration, and need for inotropic support or intravenous fluid bolus. The main outcome measures were a change in blood pressure, hypotension, and hypotension requiring intervention. Results The cohort included 45 children of mean age 8.9 ± 5.1 years. The mean inotropic support score was 12.1 ± 9.5. A total of 105 doses of paracetamol were administered. The lowest mean systolic pressure (108 ± 15 mmHg) was recorded at 60 min (p = 0.002). Systolic blood pressure decreased at 30, 60, 90, and 120 min after delivery of 50, 67, 61, and 59 drug doses, respectively. There were 5 events of systolic hypotension (decrease of 1 to 16 mmHg below systolic blood pressure hypotensive value). Mean arterial pressure decreased by ≥ 15% in 8 drug doses at 30 min (7.6%, mean − 19 ± 4 mmHg), 18 doses at 60 min (17.1%, mean − 20 ± 7 mmHg), 16 doses at 90 min (15.2%, mean − 20 ± 5 mmHg), and 17 doses at 120 min (16.2%, mean − 19 ± 5 mmHg). Mean arterial hypotension occurred at the respective time points in 2, 13, 10, and 9 drug doses. After 12 drug doses (11.4%), patients required an inotropic dose increment or fluid bolus. Conclusions Hypotensive events are not uncommon in critically ill children on inotropic support treated with intravenous paracetamol, and physicians should be alert to their occurrence and the need for intervention.
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Affiliation(s)
- Elhanan Nahum
- 1Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 14 Kaplan St., 4920235 Petach Tikva, Israel.,2Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Avichai Weissbach
- 1Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 14 Kaplan St., 4920235 Petach Tikva, Israel.,2Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eytan Kaplan
- 1Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 14 Kaplan St., 4920235 Petach Tikva, Israel.,2Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gili Kadmon
- 1Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 14 Kaplan St., 4920235 Petach Tikva, Israel.,2Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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15
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Abstract
OBJECTIVES Acetaminophen is ubiquitously used as antipyretic/analgesic administered IV to patients undergoing surgery and to critically ill patients when enteral routes are not possible. Widely believed to be safe and free of adverse side effects, concerns have developed in adult literature regarding the association of IV acetaminophen and transient hypotension. We hypothesize that there are hemodynamic effects after IV acetaminophen in the PICU and assess the prevalence of such in a large pediatric cardiovascular ICU population using high-fidelity data. DESIGN Observational study analyzing an enormous set of continuous physiologic data including millions of beat to beat blood pressures surrounding medication administration. SETTING Quaternary pediatric cardiovascular ICU between January 1, 2013, and November 13, 2017. PATIENTS All patients less than or equal to 18 years old who received IV acetaminophen. Mechanical support devices excluded. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Physiologic vital sign data were analyzed in 5-minute intervals starting 60 minutes before through 180 minutes after completion. Hypotension defined as mean arterial pressure -15% from baseline and relative hypotension defined -10%. Only doses where patients received no other medications, including vasopressors, within the previous hour were included. t test and a correlation matrix were used to eliminate correlated factors before a logistic regression analysis was performed. Six-hundred eight patients received 777 IV acetaminophen doses. Median age was 8.8 months (interquartile range, 2-62 mo) with a dose of 12.5 mg/kg (interquartile range, 10-15 mg/kg). Data were normalized for age and reference values. One in 20 doses (5%) were associated with hypotension, and one in five (20%) associated with relative hypotension. Univariate analysis revealed hypotension associated with age, baseline mean arterial pressure, and skin temperature (p = 0.05, 0.01, and 0.09). Logistic regression revealed mean arterial pressure (p = 0.01) and age (p = 0.05) remained predictive for hypotension. CONCLUSIONS In isolation of other medication, a hemodynamic response to IV acetaminophen has a higher prevalence in critically ill children with cardiac disease than previously thought and justifies controlled studies in the perioperative and critical care setting. The added impact on individual patient hemodynamics and physiologic instability will require further study.
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16
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Nahum E, Friedman M, Kaplan E, Weissbach A, Kadmon G. The Hemodynamic Effect of Intravenous Paracetamol in Children: A Retrospective Chart Review. Paediatr Drugs 2019; 21:177-183. [PMID: 31155693 DOI: 10.1007/s40272-019-00336-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
AIM Studies in adults have reported frequent episodes of blood pressure drops following intravenous paracetamol administration. We aimed to investigate the hemodynamic effects of intravenous paracetamol in critically ill children. METHODS The charts of 100 pediatric intensive care patients (age range 0.1-18 years) who were treated with intravenous paracetamol between March and September 2017 were retrospectively reviewed. A hemodynamic event was defined as a drop of > 15% in systolic or mean arterial blood pressure within 120 min after drug administration. Hypotension was defined as either a drop in systolic blood pressure (SBP) below the 5th percentile for age or a hemodynamic event associated with tachycardia, increased lactate level, or treatment with a fluid bolus or vasopressors. RESULTS A hemodynamic event was observed in 39 patients (39%). In these patients, SBP was in the pre-hypertension or hypertension values in 36/39 patients before paracetamol administration, median (IQR) SBP decreased from the 99th (95-99) percentile for age before to the 50th (50-95) percentile after paracetamol (p < 0.001) and mean heart rate was 137 bpm before treatment and 115 bpm after (p = 0.002). SBP values did not drop below the 5th percentile in any patient. In 15 patients diagnosed with shock on admission, paracetamol treatment did not cause an increase in vasopressor treatment after drug administration. CONCLUSIONS In the present study of critically ill pediatric patients, intravenous paracetamol administration was associated with a drop in SBP from high to normal values for age, possibly due to pain relief, with no evidence for a negative hemodynamic event.
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Affiliation(s)
- Elhanan Nahum
- Pediatric Intensive Care Unit, Schneider Children's Medical Center in Israel, 14 Kaplan Street, 4920235, Petach Tikva, Israel
| | - Matan Friedman
- Sackler Faculty of Medicine, Tel Aviv University, PC 39040, 69978, Tel Aviv, Israel
| | - Eytan Kaplan
- Pediatric Intensive Care Unit, Schneider Children's Medical Center in Israel, 14 Kaplan Street, 4920235, Petach Tikva, Israel
| | - Avichai Weissbach
- Pediatric Intensive Care Unit, Schneider Children's Medical Center in Israel, 14 Kaplan Street, 4920235, Petach Tikva, Israel
| | - Gili Kadmon
- Pediatric Intensive Care Unit, Schneider Children's Medical Center in Israel, 14 Kaplan Street, 4920235, Petach Tikva, Israel.
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17
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Maxwell EN, Johnson B, Cammilleri J, Ferreira JA. Intravenous Acetaminophen-Induced Hypotension: A Review of the Current Literature. Ann Pharmacother 2019; 53:1033-1041. [PMID: 31046402 DOI: 10.1177/1060028019849716] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: Recent literature suggests that intravenous (IV) administration may cause hypotension in hospitalized patients; data further suggest that this effect is most pronounced in the critically ill. The purpose of this review is to identify and evaluate current literature that addresses the incidence and implications of IV acetaminophen-induced hypotension. Data Sources: A literature search of MEDLINE, Cochrane, and EMBASE databases was performed (2002-2019) using the following terms: acetaminophen, paracetamol, intravenous, and hypotension. Abstracts and peer-reviewed publications were reviewed. Study Selection and Data Extraction: Relevant English-language studies conducted in humans evaluating the hemodynamic effects of IV acetaminophen were considered. Data Synthesis: A majority of the 19 studies included in this review identified a statistically significant drop in hemodynamic variables after the administration of 500 to 1000 mg IV acetaminophen as measured by changes in systolic blood pressure, diastolic blood pressure, or mean arterial pressure. Of the trials reporting vasopressor use, the authors found a significant increase in vasopressor requirements following IV acetaminophen administration. Relevance to Patient Care and Clinical Practice: This review represents the first comprehensive review of IV acetaminophen-induced hypotension. The findings raise the question of whether IV acetaminophen is an appropriate choice for inpatient pain or temperature management in the critically ill. Conclusions: Available evidence indicates that the administration of IV acetaminophen may be harmful in the critically ill. Additional monitoring is likely required when using IV acetaminophen in this specific population, particularly if a patient is hemodynamically unstable prior to administration.
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18
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Kamali A, Ashrafi TH, Rakei S, Noori G, Norouzi A. A comparative study on the prophylactic effects of paracetamol and dexmedetomidine for controlling hemodynamics during surgery and postoperative pain in patients with laparoscopic cholecystectomy. Medicine (Baltimore) 2018; 97:e13330. [PMID: 30572436 PMCID: PMC6320191 DOI: 10.1097/md.0000000000013330] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Today, the ever-expanding technology is inevitably shadowing on all aspects of human life. This study was aimed to compare the prophylactic effects of paracetamol and dexmedetomidine for controlling hemodynamics during surgery and postoperative pain. METHODS The study population consisted of 132 patients aged 18 to 70 years and from both genders, who were candidates for emergency cholecystectomy or elective surgery. Group A consisted of 66 patients who received dexmedetomidine, and Group B included 66 patients with paracetamol administration. The amount of postoperative pain was measured on the basis of visual analog scale, arterial blood pressure, as well as heart rate at recovery and 4, 12, and 24 hours after surgery. RESULTS The mean age in the 2 groups was similar and almost equal to 52 years; there was no difference in the sex ratios in both groups (P > .05). Pain score in the paracetamol group was significantly lower than that in the dexmedetomidine group (P = .04); nevertheless, there were no group differences in the mean scores of pain during these hours (P > .05). The median opioid use in 24 hours after operation in the paracetamol group was lower when compared with that in the dexmedetomidine group, and the mean duration of analgesia in the paracetamol group was higher when comparing with dexmedetomidine group. Furthermore, in both groups, mean arterial pressure and preoperative PR interval were similar at various times. CONCLUSION The findings demonstrated that both regimens of drugs can control the hemodynamic status of patients during laparoscopic cholecystectomy, which provides effective postoperative analgesia for pain management.
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Affiliation(s)
| | | | - Siamak Rakei
- Department of Surgery, Arak University of Medical Sciences, Arak, Iran
| | - Gholamreza Noori
- Department of Surgery, Arak University of Medical Sciences, Arak, Iran
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19
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Hanks F, McKenzie C. Paracetamol in intensive care - intravenous, oral or not at all? Anaesthesia 2018; 71:1136-40. [PMID: 27611037 DOI: 10.1111/anae.13517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F Hanks
- Critical Care, Guy's and St. Thomas' NHS Foundation Trust, London, UK.,Kings College, London, UK
| | - C McKenzie
- Critical Care, Guy's and St. Thomas' NHS Foundation Trust, London, UK. .,Kings College, London, UK.
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20
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Kang S, Durey A, Suh YJ, Kim AJ. Hemodynamic changes after propacetamol administration in patients with febrile UTI in the ED. Am J Emerg Med 2018; 36:935-941. [DOI: 10.1016/j.ajem.2017.10.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 10/20/2017] [Accepted: 10/24/2017] [Indexed: 11/16/2022] Open
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21
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Chiam E, Bellomo R, Churilov L, Weinberg L. The hemodynamic effects of intravenous paracetamol (acetaminophen) vs normal saline in cardiac surgery patients: A single center placebo controlled randomized study. PLoS One 2018; 13:e0195931. [PMID: 29659631 PMCID: PMC5901786 DOI: 10.1371/journal.pone.0195931] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 03/09/2018] [Indexed: 11/18/2022] Open
Abstract
The hemodynamic effects of intravenous (IV) paracetamol in patients undergoing cardiac surgery are unknown. We performed a prospective single center placebo controlled randomized study with parallel group design in adult patients undergoing elective cardiac surgery. Participants received paracetamol (1 gram) IV or placebo (an equal volume of 0.9% saline) preoperatively followed by two postoperative doses 6 hours apart. The primary endpoint was the absolute change in systolic (SBP) 30 minutes after the preoperative infusion, analysed using an ANCOVA model. Secondary endpoints included absolute changes in mean arterial pressure (MAP) and diastolic blood pressure (DPB), and other key hemodynamic variables after each infusion. All other endpoints were analysed using random-effect generalized least squares regression modelling with individual patients treated as random effects. Fifty participants were randomly assigned to receive paracetamol (n = 25) or placebo (n = 25). Post preoperative infusion, paracetamol decreased SBP by a mean (SD) of 13 (18) mmHg, p = 0.02, compared to a mean (SD) of 1 (11) mmHg with saline. Paracetamol decreased MAP and DBP by a mean (SD) of 9 (12) mmHg and 8 (9) mmHg (p = 0.01 and 0.02), respectively, compared to a mean (SD) of 1 (8) mmHg and 0 (6) mmHg with placebo. Postoperatively, there were no significant differences in pressure or flow based hemodynamic parameters in both groups. This study provides high quality evidence that the administration of IV paracetamol in patients undergoing cardiac surgery causes a transient decrease in preoperative blood pressure when administered before surgery but no adverse hemodynamic effects when administered in the postoperative setting.
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Affiliation(s)
- Elizabeth Chiam
- Department of Surgery, The University of Melbourne, Austin Hospital, Heidelberg, Victoria, Australia
| | - Rinaldo Bellomo
- Department of Intensive Care, Austin Hospital, Heidelberg, Victoria, Australia
| | - Leonid Churilov
- The Florey Institute of Neuroscience and Mental Health, Melbourne Brain Centre, Heidelberg, Victoria, Australia
| | - Laurence Weinberg
- Department of Surgery, The University of Melbourne, Austin Hospital, Heidelberg, Victoria, Australia
- Anesthesia, Perioperative and Pain Medicine, The University of Melbourne, Victoria, Australia
- * E-mail:
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22
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Lee HJ, Suh YJ, Kim AJ, Han SB, Durey A. Hemodynamic changes in patients with influenza A after propacetamol infusion in the emergency department. Am J Emerg Med 2018. [DOI: 10.1016/j.ajem.2017.06.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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23
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Ray S, Brick T, Raman S, Birrell PJ, Klein NJ, Peters MJ. Haemodynamic changes with paracetamol in critically-ill children. J Crit Care 2017; 40:108-112. [PMID: 28380408 DOI: 10.1016/j.jcrc.2017.03.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 03/22/2017] [Accepted: 03/29/2017] [Indexed: 11/28/2022]
Abstract
PURPOSE Paracetamol has been associated with a reduction in blood pressure, especially in febrile, critically-ill adults. We hypothesised that blood pressure would fall following administration of paracetamol in critically-ill children and this effect would be greater during fever and among children with a high body surface area to weight ratio. METHODS A 12-month prospective observational study of children (0-16years) admitted to paediatric intensive care, who underwent pulse contour analysis and received paracetamol concurrently. RESULTS Mean arterial blood pressure decreased significantly by 4.7% from baseline (95% CI 1.75-8.07%) in 31 children following 148 doses of paracetamol. The nadir was 2-hour post-dose. The effect was pronounced in children with fever at baseline (6.4%, 95% CI 2.8-10%), although this was not statistically significant. There was no simple relationship between this effect and body surface area to weight ratio. The association between a change in blood pressure and changes in heart rate or measured stroke volume was poor; therefore it was likely that a change in the systemic vascular resistance contributes most to this effect. CONCLUSION There is a significant but modest reduction in blood pressure post-paracetamol in critically-ill children. This is likely related to a change in systemic vascular resistance.
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Affiliation(s)
- Samiran Ray
- Paediatric Intensive Care Unit, Great Ormond Street Hospital, London, WC1N 3JH, UK; Respiratory, Anaesthesia and Critical Care Section, UCL Institute of Child Health, London, WC1N 1EH, UK.
| | - Thomas Brick
- Paediatric Intensive Care Unit, Great Ormond Street Hospital, London, WC1N 3JH, UK
| | - Sainath Raman
- Paediatric Intensive Care Unit, Great Ormond Street Hospital, London, WC1N 3JH, UK; Respiratory, Anaesthesia and Critical Care Section, UCL Institute of Child Health, London, WC1N 1EH, UK
| | - Paul J Birrell
- MRC Biostatistics Unit, Institute of Public Health, Cambridge, CB2 0SR, UK
| | - Nigel J Klein
- Infection, Inflammation and Rheumatology Section, UCL Institute of Child Health, London, WC1N 1EH, UK
| | - Mark J Peters
- Paediatric Intensive Care Unit, Great Ormond Street Hospital, London, WC1N 3JH, UK; Respiratory, Anaesthesia and Critical Care Section, UCL Institute of Child Health, London, WC1N 1EH, UK
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24
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Effects of IV Acetaminophen on Core Body Temperature and Hemodynamic Responses in Febrile Critically Ill Adults. Crit Care Med 2017; 45:1199-1207. [DOI: 10.1097/ccm.0000000000002340] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Bae JI, Ahn S, Lee YS, Kim WY, Lee JH, Oh BJ, Lim KS. Clinically significant hemodynamic alterations after propacetamol injection in the emergency department: prevalence and risk factors. Intern Emerg Med 2017; 12:349-355. [PMID: 27165165 DOI: 10.1007/s11739-016-1460-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 04/28/2016] [Indexed: 10/21/2022]
Abstract
Propacetamol, a water-soluble prodrug form of paracetamol, is hydrolyzed by esterase to generate paracetamol in the blood. Each gram of propacetamol is equal to 0.5 g of paracetamol. It has been reported to cause hypotension in critically ill patients with a fever. We aimed to investigate the hemodynamic effects of propacetamol for the control of fever in patients with diverse severities of illness who were managed in the emergency department (ED). We also aimed to identify clinical factors related to significant hemodynamic alterations in ED patients. This was a retrospective study of 1507 ED patients who received propacetamol. Significant hemodynamic alterations were defined as systolic blood pressure (SBP) <90 mmHg or diastolic blood pressure (DBP) <60 mmHg, or a drop in SBP >30 mmHg, which required treatments with a bolus of fluid or vasopressor administration. Postinfusion SBP and DBP were significantly lower than the preinfusion SBP and DBP. A clinically significant drop in BP occurred in 162 (10.7 %) patients, and interventions were necessary. Among the predictors assessed, congestive heart failure (OR 6.21, 95 % CI 2.67-14.45) and chills (OR 3.10, 95 % CI 2.04-4.70) were independent factors for a significant hemodynamic change. Administration of propacetamol can provoke a reduction in BP in ED patients. This reduction was clinically significant for 10 % of infusions. Clinicians should be aware of this potential deleterious effect, especially in patients with congestive heart failure or who experience chills prior to the administration of propacetamol.
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Affiliation(s)
- June-Il Bae
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
| | - Shin Ahn
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea.
| | - Yoon-Seon Lee
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
| | - Won Young Kim
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
| | - Jae Ho Lee
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
| | - Bum Jin Oh
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
| | - Kyung Soo Lim
- Department of Emergency Medicine, Asan Medical Center, College of Medicine, University of Ulsan, 388-1, Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea
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Acetaminophen-Induced Changes in Systemic Blood Pressure in Critically Ill Patients. Crit Care Med 2016; 44:2192-2198. [DOI: 10.1097/ccm.0000000000001954] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chiumello D, Gotti M, Vergani G. Paracetamol in fever in critically ill patients-an update. J Crit Care 2016; 38:245-252. [PMID: 27992852 DOI: 10.1016/j.jcrc.2016.10.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/20/2016] [Accepted: 10/31/2016] [Indexed: 11/26/2022]
Abstract
Fever, which is arbitrary defined as an increase in body temperature above 38.3°C, can affect up to 90% of patients admitted in intensive care unit. Induction of fever is mediated by the release of pyrogenic cytokines (tumor necrosis factor α, interleukin 1, interleukin 6, and interferons). Fever is associated with increased length of stay in intensive care unit and with a worse outcome in some subgroups of patients (mainly neurocritically ill patients). Although fever can increase oxygen consumption in unstable patients, on the contrary, it can activate physiologic systems that are involved in pathogens clearance. Treatments to reduce fever include the use of antipyretics. Thus, the reduction of fever might reduce the ability to develop an efficient host response. This balance, between harms and benefits, has to be taken into account every time we decide to treat or not to treat fever in a given patient. Among the antipyretics, paracetamol is one of the most common used. Paracetamol is a synthetic, nonopioid, centrally acting analgesic, and antipyretic drug. Its antipyretic effect occurs because it inhibits cyclooxygenase-3 and the prostaglandin synthesis, within the central nervous system, resetting the hypothalamic heat-regulation center. In this clinical review, we will summarize the use of paracetamol as antipyretic in critically ill patients (sepsis, trauma, neurological, and medical).
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Affiliation(s)
- D Chiumello
- Dipartimento di Emergenza-Urgenza, ASST Santi Paolo e Carlo, Milan, Italy; Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milan, Italy.
| | - M Gotti
- Dipartimento di Emergenza-Urgenza, ASST Santi Paolo e Carlo, Milan, Italy
| | - G Vergani
- Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milan, Italy
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Ehieli E, Yalamuri S, Brudney CS, Pyati S. Analgesia in the surgical intensive care unit. Postgrad Med J 2016; 93:38-45. [PMID: 27777355 DOI: 10.1136/postgradmedj-2016-134047] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 07/10/2016] [Accepted: 08/27/2016] [Indexed: 01/30/2023]
Abstract
Critically ill patients are a heterogeneous group with diverse comorbidities and physiological derangements. The management of pain in the critically ill population is emerging as a standard of care in the intensive care unit (ICU). Pain control of critically ill patients in the ICU presents numerous challenges to intensivists. Inconsistencies in pain assessment, analgesic prescription and variation in monitoring sedation and analgesia result in suboptimal pain management. Inadequate pain control can have deleterious effects on several organ systems in critically ill patients. Therefore, it becomes incumbent on physicians and nurses caring for these patients to carefully evaluate their practice on pain management and adopt an optimal pain management strategy that includes a reduction in noxious stimuli, adequate analgesia and promoting education regarding sedation and analgesia to the ICU staff. Mechanistic approaches and multimodal analgesic techniques have been clearly demonstrated to be the most effective pain management strategy to improve outcomes. For example, recent evidence suggests that the use of short acting analgesics and analgesic adjuncts for sedation is superior to hypnotic based sedation in intubated patients. This review will address analgesia in the ICU, including opioid therapy, adjuncts, regional anaesthesia and non-pharmacological options that can provide a multimodal approach to treating pain.
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Affiliation(s)
- Eric Ehieli
- Department of Anesthesiology, Duke University Medical Center, Surgical Intensive Care Unit, Veterans Affairs Medical Center, Durham, North Carolina, USA
| | - Suraj Yalamuri
- Department of Anesthesiology, Duke University Medical Center, Surgical Intensive Care Unit, Veterans Affairs Medical Center, Durham, North Carolina, USA
| | - Charles S Brudney
- Department of Anesthesiology, Duke University Medical Center, Surgical Intensive Care Unit, Veterans Affairs Medical Center, Durham, North Carolina, USA
| | - Srinivas Pyati
- Department of Anesthesiology, Duke University Medical Center, Surgical Intensive Care Unit, Veterans Affairs Medical Center, Durham, North Carolina, USA
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Chiam E, Weinberg L, Bailey M, McNicol L, Bellomo R. The haemodynamic effects of intravenous paracetamol (acetaminophen) in healthy volunteers: a double-blind, randomized, triple crossover trial. Br J Clin Pharmacol 2016; 81:605-12. [PMID: 26606263 DOI: 10.1111/bcp.12841] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 11/17/2015] [Accepted: 11/18/2015] [Indexed: 11/29/2022] Open
Abstract
AIM The haemodynamic effects of intravenous paracetamol have not been systematically investigated. We compared the physiological effects of intravenous mannitol-containing paracetamol, and an equivalent dosage of mannitol, and normal saline 0.9% in healthy volunteers. METHODS We performed a blinded, triple crossover, randomized trial of 24 adult healthy volunteers. Participants received i.v. paracetamol (1 g paracetamol +3.91 g mannitol 100 ml(-1) ), i.v. mannitol (3.91 g mannitol 100 ml(-1) ) and i.v. normal saline (100 ml). Composite primary end points were changes in mean arterial pressure (MAP), systolic blood pressure (SBP) and diastolic blood pressure (DBP) measured pre-infusion, during a 15 min infusion period and over a 45 min observation period. Systemic vascular resistance index (SVRI) and cardiac index were measured at the same time points. RESULTS Infusion of paracetamol induced a transient yet significant decrease in blood pressures from pre-infusion values (MAP -1.85 mmHg, 95% CI -2.6, -1.1, SBP -0.54 mmHg, 95% CI -1.7, 0.6 and DBP -1.92 mmHg, 95% CI -2.6, -1.2, P < 0.0001), associated with a transient reduction in SVRI and an increase in cardiac index. Changes were observed, but to a lesser extent with normal saline (MAP -0.15 mmHg, SBP +1.44 mmHg, DBP --0.73 mmHg, P < 0.0001), but not with mannitol (MAP +1.47 mmHg, SBP +4.03 mmHg, DBP +0.48 mmHg, P < 0.0001). CONCLUSIONS I.v. paracetamol caused a transient decrease in blood pressure immediately after infusion. These effects were not seen with mannitol or normal saline. The physiological mechanism was consistent with vasodilatation. This study provides plausible physiological data in a healthy volunteer setting, supporting transient changes in haemodynamic variables with i.v. paracetamol and justifies controlled studies in the peri-operative and critical care setting.
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Affiliation(s)
- Elizabeth Chiam
- Department of Surgery, The University of Melbourne, Victoria
| | - Laurence Weinberg
- Department of Surgery and Centre for Anesthesia, Perioperative and Pain Medicine, The University of Melbourne, Victoria
| | - Michael Bailey
- Department of Epidemiology and Preventive Medicine, Monash University, Victoria
| | - Larry McNicol
- Department of Surgery, The University of Melbourne, Victoria.,Department of Anesthesia, Austin Hospital, The University of Melbourne, Victoria
| | - Rinaldo Bellomo
- The University of Melbourne, Victoria.,Department of Intensive Care, Austin Hospital, Heidelberg, Victoria, Australia
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Marzuillo P, Guarino S, Barbi E. Paracetamol: a focus for the general pediatrician. Eur J Pediatr 2014; 173:415-25. [PMID: 24374658 DOI: 10.1007/s00431-013-2239-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 12/05/2013] [Indexed: 02/02/2023]
Abstract
UNLABELLED Paracetamol (acetaminophen) is one of the most popular and widely used drugs for the treatment of pain and fever in children. This drug has multiple mechanisms of action, but its pharmacodynamic is still not well known. The central nervous system is the main site of action and it mirrors the paracetamol effect compartment. The recommended dosages and routes of administration should be different whether paracetamol is used for the treatment of pain or fever. For example, the rectal route, while being efficacious for the treatment of fever, should be avoided in pain management. Paracetamol is a safe drug, but some clinical conditions and concomitant drugs, which are frequent in clinical practice, may increase the risk of paracetamol toxicity. Therefore, it is important to optimize its administration to avoid overdoses and maximize its effect. The principal mediator of the paracetamol toxicity is the N-acetyl-p-benzo-quinone imine (NAPQI), a toxic product of the paracetamol metabolism, which could bind cysteine groups on proteins forming paracetamol-protein adduct in the liver. CONCLUSION Although frequently prescribed, the concept of "effect compartment concentration" and the possible co-factors that could cause toxicity at recommended doses are not familiar to all pediatricians and general practitioners. We reviewed the literature concerning paracetamol mechanisms of action, we highlighted some relevant pharmacodynamic concepts for clinical practice, and we summarized the possible risk factors for toxicity at therapeutic dosages.
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Affiliation(s)
- Pierluigi Marzuillo
- Department of Women and Children and General and Specialized Surgery, Seconda Università degli Studi di Napoli, Via L. De Crecchio 2, 80138, Naples, Italy,
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Krajčová A, Matoušek V, Duška F. Mechanism of paracetamol-induced hypotension in critically ill patients: a prospective observational cross-over study. Aust Crit Care 2012; 26:136-41. [PMID: 22424816 DOI: 10.1016/j.aucc.2012.02.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2011] [Revised: 02/05/2012] [Accepted: 02/14/2012] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To elucidate the mechanism of hypotension following intravenous administration of paracetamol (acetaminophen) to patients on the Intensive Care Unit. DESIGN Prospective observational cross-over study. SETTING Intensive Care Unit, University Hospital Královské Vinohrady, Prague, Czech Republic. METHODS Ventilated critically ill patients monitored by PiCCO and administered intravenous paracetamol at the same time were eligible for the study. We recorded haemodynamic indices, as well as core and peripheral temperatures, continuously for 3 h after the dose of paracetamol. Ranitidine was then used as a control drug known not to influence haemodynamics. RESULTS We included 6 subjects, and recorded 48 cycles of observations after administration of paracetamol, and 35 cycles after administration of the control drug. Haemodynamic parameters were not different at the baseline and administration of control drug did not result in any change in haemodynamics. After intravenous paracetamol, mean arterial pressure (MAP) dropped by 7% (p<0.001) with a nadir at the 19th minute. In 22 measurement cycles (45%) we noted >15% reduction in MAP with paracetamol. Analysis of these cycles suggests that hypotension with paracetamol can be caused by reduction of both cardiac index and systemic vascular resistance. In febrile cycles paracetamol caused narrowing of the gradient between central and peripheral temperatures suggesting skin vasodilation. These changes were not correlated to a change of systemic vascular resistance at any time point. CONCLUSION Hypotension with intravenous paracetamol in critically ill patients is caused by a reduction of both cardiac output and systemic vascular resistance. We did not demonstrate any relation between haemodynamic changes and antipyretic action of paracetamol. A possibility that cardiac output is reduced with paracetamol might be clinically important.
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Affiliation(s)
- Adéla Krajčová
- 3rd Faculty of Medicine, Charles University, Prague, Czech Republic.
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Boyle M. Response to “Hypotension with acetaminophen—Maybe there is a different mechanism”. Aust Crit Care 2011. [DOI: 10.1016/j.aucc.2011.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Hypotension with acetaminophen—Maybe there is a different mechanism. Aust Crit Care 2011; 24:150; author reply 150-1. [DOI: 10.1016/j.aucc.2011.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 04/12/2011] [Indexed: 11/22/2022] Open
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