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Bilgen S, Erdoğan Ari D, Özveri E. The Effect of Ondansetron on the Analgesic Efficacy of Tramadol in Patients Undergoing Laparoscopic Cholecystectomy. Int J Clin Pract 2022; 2022:7387600. [PMID: 35685538 PMCID: PMC9159173 DOI: 10.1155/2022/7387600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/23/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022] Open
Abstract
Purpose Investigating the effect of ondansetron on the efficacy of tramadol in patients undergoing laparoscopic cholecystectomy. Methods Sixty American Society of Anesthesiologists (ASA) I-II patients over the age of 18 who underwent laparoscopic cholecystectomy were included in this study. All patients were given 1 mg/kg tramadol intravenously (iv) during the intraoperative period. Patients were randomly assigned to receive either 4 mg ondansetron (Group O) or 2 mL saline (Group S). Postoperative tramadol consumption, pain score (NRS), intensity of nausea (NRS), presence of vomiting, consumption of rescue analgesics and antiemetics, and patient satisfaction were recorded. Results A total of 60 patients were enrolled in the study; five patients were excluded due to deviation from the protocol. Data from 55 patients (Group O: 28 patients, Group S: 27 patients) were evaluated in the study. No differences between the two groups were detected for postoperative consumption of tramadol, pain score (NRS), intensity of nausea (NRS), presence of vomiting, consumption of rescue analgesics and antiemetics, and patient satisfaction. Conclusions The results showed that coadministration of tramadol and ondansetron did not change tramadol consumption during the postoperative 24 hours after laparoscopic cholecystectomy. Clinical trial registration number is as follows: https://clinicaltrials.gov/ct2/show/NCT04745273-01/31/2021.
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Affiliation(s)
- Sevgi Bilgen
- Acibadem Kozyataği Hospital, Department of Anesthesiology, Ondokuz Mayıs Mah, Begonya Sokak, No. 12, Kadıköy, İstanbul, Turkey
| | - Dilek Erdoğan Ari
- Acibadem Kozyataği Hospital, Department of Anesthesiology, Ondokuz Mayıs Mah, Begonya Sokak, No. 12, Kadıköy, İstanbul, Turkey
| | - Emel Özveri
- Acibadem Kozyataği Hospital, Department of General Surgery, Ondokuz Mayıs Mah, Begonya Sokak, No. 12, Kadıköy, İstanbul, Turkey
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Yasufuku K, Koike K, Kobayashi M, Chiba H, Kitaura M, Takenouchi S, Hasegawa M, Morioka Y, Mishima H, Suzuki T, Fujita M. Involvement of the Peripheral μ-Opioid Receptor in Tramadol-Induced Constipation in Rodents. Biol Pharm Bull 2021; 44:1746-1751. [PMID: 34719650 DOI: 10.1248/bpb.b21-00474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Tramadol is a weak opioid that produces analgesic effect via both the μ-opioid receptor (MOR) and non-opioid targets. Constipation is the most common opioid-related side effect in patients with cancer and non-cancer pain. However, the contribution of MOR to tramadol-induced constipation is unclear. Therefore, we used naldemedine, a peripherally acting MOR antagonist, and MOR-knockout mice to investigate the involvement of peripheral MOR in tramadol-induced constipation using a small intestinal transit model. A single dose of tramadol (3-100 mg/kg, per os (p.o.)) inhibited small intestinal transit dose-dependently in rats. Naldemedine (0.01-10 mg/kg, p.o.) blocked the inhibition of small intestinal transit induced by tramadol (30 mg/kg, p.o.) in rats. The transition rate increased dose-dependently over the range of naldemedine 0.01-0.3 mg/kg, and complete recovery was observed at 0.3-10 m/kg. Additionally, tramadol (30 and 100 mg/kg, subcutaneously (s.c.)) inhibited small intestinal transit in wild-type mice but not in MOR-knockout mice. These results suggest that peripheral MOR participates in tramadol-induced constipation.
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Affiliation(s)
- Kana Yasufuku
- Laboratory for Drug Discovery and Disease Research, Shionogi & Co., Ltd
| | - Katsumi Koike
- Laboratory for Drug Discovery and Disease Research, Shionogi & Co., Ltd
| | - Mika Kobayashi
- Research Area for Pharmacological Evaluation, Shionogi TechnoAdvance Research Co., Ltd
| | - Hiroki Chiba
- Research Area for Pharmacological Evaluation, Shionogi TechnoAdvance Research Co., Ltd
| | - Motoji Kitaura
- General Administration Division, Shionogi Administration Service Co., Ltd
| | - Shino Takenouchi
- Transgenic and Breeding Technology, Shionogi TechnoAdvance Research Co., Ltd
| | - Minoru Hasegawa
- Laboratory for Drug Discovery and Disease Research, Shionogi & Co., Ltd
| | | | | | - Tsutomu Suzuki
- Department of Pharmacology, School of Pharmacy, Shonan University of Medical Sciences
| | - Masahide Fujita
- Laboratory for Drug Discovery and Disease Research, Shionogi & Co., Ltd
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Zebrafish early life stages as alternative model to study 'designer drugs': Concordance with mammals in response to opioids. Toxicol Appl Pharmacol 2021; 419:115483. [PMID: 33722667 DOI: 10.1016/j.taap.2021.115483] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 03/02/2021] [Accepted: 03/05/2021] [Indexed: 02/06/2023]
Abstract
The number of new psychoactive substances (NPS) on the illicit drug market increases fast, posing a need to urgently understand their toxicity and behavioural effects. However, with currently available rodent models, NPS assessment is limited to a few substances per year. Therefore, zebrafish (Danio rerio) embryos and larvae have been suggested as an alternative model that would require less time and resources to perform an initial assessment and could help to prioritize substances for subsequent evaluation in rodents. To validate this model, more information on the concordance of zebrafish larvae and mammalian responses to specific classes of NPS is needed. Here, we studied toxicity and behavioural effects of opioids in zebrafish early life stages. Synthetic opioids are a class of NPS that are often used in pain medication but also frequently abused, having caused multiple intoxications and fatalities recently. Our data shows that fentanyl derivatives were the most toxic among the tested opioids, with toxicity in the zebrafish embryo toxicity test decreasing in the following order: butyrfentanyl>3-methylfentanyl>fentanyl>tramadol> O-desmethyltramadol>morphine. Similar to rodents, tramadol as well as fentanyl and its derivatives led to hypoactive behaviour in zebrafish larvae, with 3-methylfentanyl being the most potent. Physico-chemical properties-based predictions of chemicals' uptake into zebrafish embryos and larvae correlated well with the effects observed. Further, the biotransformation pattern of butyrfentanyl in zebrafish larvae was reminiscent of that in humans. Comparison of toxicity and behavioural responses to opioids in zebrafish and rodents supports zebrafish as a suitable alternative model for rapidly testing synthetic opioids.
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Camilleri M, Lembo A, Katzka DA. Opioids in Gastroenterology: Treating Adverse Effects and Creating Therapeutic Benefits. Clin Gastroenterol Hepatol 2017; 15:1338-1349. [PMID: 28529168 PMCID: PMC5565678 DOI: 10.1016/j.cgh.2017.05.014] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/02/2017] [Indexed: 02/07/2023]
Abstract
The use of opioid medications on both an acute and chronic basis is ubiquitous in the United States. As opioid receptors densely populate the gastrointestinal tract, symptoms and side effects can be expected in these patients. In the esophagus, dysmotility may result, manifesting with dysphagia and a syndrome indistinguishable from primary achalasia. In the stomach, a marked delay in gastric emptying may occur with postprandial nausea and early satiety. Postoperatively, particularly with abdominal surgery, opioid-induced ileus may ensue. In the colon, opioid-induced constipation is common. A unique syndrome termed narcotic bowel syndrome is characterized by chronic abdominal pain often accompanied by nausea and vomiting in the absence of other identifiable causes. With the recognition of the important role of opioids on gastrointestinal function, novel drugs have been developed that use this physiology. These medications include peripheral acting opioid agonists to treat opioid-induced constipation and combination agonist and antagonists used for diarrhea-predominant irritable bowel syndrome. This review summarizes the most recent data in these areas.
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Affiliation(s)
- Michael Camilleri
- Clinical Enteric Neuroscience Translational and Epidemiological Research (C.E.N.T.E.R.), Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Anthony Lembo
- Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - David A Katzka
- Clinical Enteric Neuroscience Translational and Epidemiological Research (C.E.N.T.E.R.), Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
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Kim DJ, Ryu HM, Park SI, Park SJ, Song CH, Ku SK. Pharmacokinetic Properties of Ondansetron in Combination with Ijintang-gamibang, Polyherbal Complex in Rats. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.351.358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Stevens AJ, Woodman RJ, Owen H. The effect of ondansetron on the efficacy of postoperative tramadol: a systematic review and meta-analysis of a drug interaction. Anaesthesia 2014; 70:209-18. [PMID: 25490944 DOI: 10.1111/anae.12948] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2014] [Indexed: 12/01/2022]
Abstract
Several studies have investigated the presence of a drug interaction between tramadol and ondansetron that reduced the efficacy of tramadol postoperatively. Most of these studies were small and the results inconsistent, so we performed a systematic review and meta-analysis of randomised controlled trials comparing the cumulative dose of tramadol administered by patient-controlled analgesia within the first 24 h after surgery between subjects receiving tramadol alone and those who received tramadol with ondansetron. Six studies, with a total of 340 participants, met the selection criteria and were included in the meta-analysis. There was an increased tramadol requirement in patients receiving ondansetron. The standardised mean difference in tramadol requirements, expressed in terms of standard deviations (95% CI), was 1.03 (0.54-1.53) (p < 0.001) at 4 h, 0.66 (0.06-1.25) (p = 0.03) at 8 h, 0.86 (0.41-1.31) (p < 0.001) at 12 h and 0.45 (0.01-0.90) (p = 0.046) at 24 h postoperatively, where the mean pooled standard deviations were 79.5, 157.7, 238.1 and 289.4 mg at 4, 8, 12 and 24 h, respectively. There was a significant linear time effect over the 24 h, indicating that the effect of ondansetron on tramadol consumption diminished with time. The results support the presence of a drug interaction between tramadol and ondansetron in the early postoperative period that potentially decreases the effectiveness of tramadol.
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Affiliation(s)
- A J Stevens
- Flinders University, Bedford Park, South Australia, Australia
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Galinski SF, Pereira JA, Maestre Y, Francés S, Escolano F, Puig MM. The combination of intravenous dexamethasone and ketamine does not improve postoperative analgesia when compared to each drug individually. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/016911107x376936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Barros A, Vale CP, Oliveira FC, Ventura C, Assunção J, Fontes Ribeiro CA, Pereira FC. Dexamethasone effect on postoperative pain and tramadol requirement after thyroidectomy. Pharmacology 2013; 91:153-7. [PMID: 23392332 DOI: 10.1159/000346612] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 12/12/2012] [Indexed: 11/19/2022]
Abstract
Tramadol is a central-acting analgesic associated with nausea and vomiting. Clinical studies have demonstrated that glucocorticoids have analgesic and antiemetic effects when administered perioperatively. The aim of this study is to test the hypothesis that coadministration of tramadol and dexamethasone decreases both postoperative pain and tramadol requirement by patient-controlled analgesia (PCA). Forty female patients undergoing thyroidectomy under general anesthesia were enrolled in a double-blind randomized controlled study and allocated to receive dexamethasone 4 mg i.v. (dexamethasone group, n = 20) or saline (control group, n = 20). At 0, 1, 2, 4 and 22 h of PCA, tramadol consumption and pain were evaluated. Although pain (numerical rating scale 0-10) was significantly lower in the dexamethasone group compared to the control group (2.9 ± 1.4 vs. 3.8 ± 1.2, p = 0.02) at the beginning of PCA, tramadol demand was not significantly different. Although the results herein show a possible beneficial effect of a preoperative single low dose of dexamethasone on postoperative pain, the hypothesis that this corticosteroid decreases tramadol requirement is not supported.
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Affiliation(s)
- Ana Barros
- Department of Anaesthesiology, Centro Hospitalar Tondela-Viseu, E.P.E, Viseu, Portugal
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Lu KZ, Shen H, Chen Y, Li MG, Tian GP, Chen J. Ondansetron does not attenuate the analgesic efficacy of nefopam. Int J Med Sci 2013; 10:1790-4. [PMID: 24273453 PMCID: PMC3837238 DOI: 10.7150/ijms.5386] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 10/17/2013] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES The aim of this study was to investigate if there is any interaction between ondansetron and nefopam when they are continuously co-administrated during patient-controlled intravenous analgesia (PCIA). METHODS The study was a prospective, randomized, controlled, non-inferiority clinical trial comparing nefopam-plus-ondansetron to nefopam alone. A total of 230 postoperative patients using nefopam for PCIA, were randomly assigned either to a group receiving continuous infusion of ondansetron (Group O) or to the other group receiving the same volume of normal saline continuously (Group N). Postoperative pain intensity scores, the sum of pain intensity difference over 24 hours postoperatively (SPID24hr), the incidence of adverse events, and the total consumption of nefopam were evaluated respectively. RESULTS Postoperative pain was treated successfully in both groups. The mean SPID24hr scores were 95.6 mm in Group N and 109.3mm in Group O [95% confidence interval (CI) -14.28, 24.32]. The lower margin of the 95% CI was above the pre-determined non-inferiority margin (-30mm) for SPID24hr, which indicated that nefopam-plus-ondansetron was not worse than the nefopam alone in term of analgesic efficacy. In addition, there was no statistical difference between the two groups in term of cumulative consumption of nefopam. Compared with Group N, postoperative vomiting was significantly reduced in Group O during the postoperative 24 hours (P < 0.05). Less rescue antiemetics were given to patients in Group O than those receiving nefopam alone (P < 0.05). There were no differences in postoperative nausea between the two groups. CONCLUSION Nefopam-plus-ondansetron is not inferior to nefopam alone in relieving the pain in PCIA after minimally invasive surgery. In addition, adverse events are reduced without compromising analgesic efficacy.
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Affiliation(s)
- Kai-zhi Lu
- 1. Department of Anaesthesiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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Prior H, Ewart L, Bright J, Valentin JP. Refinement of the Charcoal Meal Study by Reduction of the Fasting Period. Altern Lab Anim 2012; 40:99-107. [DOI: 10.1177/026119291204000209] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this investigation was to determine whether a shorter fasting period than the one historically employed for the charcoal meal test, could be used when measuring gastric emptying and intestinal transit within the same animal, and to ascertain whether the scientific outcome would be affected by this benefit to animal welfare. Rats and mice were fasted for 0, 3, 6 or 18 hours before the oral administration of vehicle or atropine. One hour later, the animals were orally administered a charcoal meal, then 20 minutes later, they were killed and the stomach and small intestine were removed. Intestinal transit time (the position of the charcoal front as a percentage of the total length of the small intestine) and relative gastric emptying (weight of stomach contents) were measured. Rats and mice fasted for six hours showed results for gastric emptying and intestinal transit which were similar to those obtained in animals fasted for 18 hours. Reducing the fasting period reduced the body weight loss in both species, and mice on shorter fasts could be group-housed, as hunger-induced fighting was lessened. Therefore, a fasting period of six hours was subsequently adopted for charcoal meal studies at our institution.
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Affiliation(s)
- Helen Prior
- Safety Pharmacology, Global Safety Assessment, AstraZeneca UK Ltd, Mereside, Alderley Park, Macclesfield, Cheshire, UK
| | - Lorna Ewart
- Safety Pharmacology, Global Safety Assessment, AstraZeneca UK Ltd, Mereside, Alderley Park, Macclesfield, Cheshire, UK
| | - Jonathan Bright
- Safety Pharmacology, Global Safety Assessment, AstraZeneca UK Ltd, Mereside, Alderley Park, Macclesfield, Cheshire, UK
| | - Jean-Pierre Valentin
- Safety Pharmacology, Global Safety Assessment, AstraZeneca UK Ltd, Mereside, Alderley Park, Macclesfield, Cheshire, UK
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Duchi S, Touitou E, Pradella L, Marchini F, Ainbinder D. Nasal Tramadol delivery system: A new approach for improved pain therapy. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.eujps.2011.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Vale C, Oliveira F, Assunção J, Fontes-Ribeiro C, Pereira F. Co-Administration of Ondansetron Decreases the Analgesic Efficacy of Tramadol in Humans. Pharmacology 2011; 88:182-7. [DOI: 10.1159/000330740] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 06/24/2011] [Indexed: 11/19/2022]
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Minville V, Fourcade O, Mazoit J, Girolami J, Tack I. Ondansetron does not block paracetamol-induced analgesia in a mouse model of fracture pain. Br J Anaesth 2011; 106:112-8. [DOI: 10.1093/bja/aeq277] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Rauers NI, Stüber F, Lee EH, Musshoff F, Fimmers R, Barann M, Stamer UM. Antagonistic Effects of Ondansetron and Tramadol? A Randomized Placebo and Active Drug Controlled Study. THE JOURNAL OF PAIN 2010; 11:1274-81. [DOI: 10.1016/j.jpain.2010.03.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Revised: 02/10/2010] [Accepted: 03/04/2010] [Indexed: 11/24/2022]
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Analysis of the opioid–opioid combinations according to the nociceptive stimulus in mice. Pharmacol Res 2010; 61:511-8. [DOI: 10.1016/j.phrs.2010.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Revised: 02/24/2010] [Accepted: 02/24/2010] [Indexed: 01/10/2023]
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Paraskeva A, Chatziara V, Siafaka I, Zotou M, Fassoulaki A. Ropivacaine spinal anesthesia is not antagonized by ondansetron pretreatment. Anesth Analg 2009; 109:1684-7. [PMID: 19843809 DOI: 10.1213/ane.0b013e3181b7c4f6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND We investigated a possible effect of ondansetron on the duration of sensory and motor block produced by ropivacaine. METHODS Fifty male patients undergoing transurethral surgery received either 8 mg oral ondansetron the evening before surgery plus IV 8 mg ondansetron 15 min before subarachnoid anesthesia or placebo. All patients received 2.2 mL of 0.75% plain ropivacaine intrathecally. Sensory and motor block were assessed 30 min after the intrathecal injection and every 30 min thereafter until recovery from the motor block. RESULTS Thirty minutes after spinal injection of ropivacaine, we first measured, in both groups, the time to maximum block for both sensory and motor modalities. The maximum level of the sensory block, defined as decreased sensation, was T8 in the control and T6 in the ondansetron group, and absence of sensation was defined as T11 and T9 for the control and the ondansetron groups, respectively. Regarding block duration, 180 min after spinal injection, sensory block was detected in 11 of 22 and 16 of 24 patients and motor block in 1 of 22 and 0 of 24 in the control and ondansetron groups, respectively. Sensory and motor block did not differ between groups at any measured time point. CONCLUSIONS Ondansetron had no effect on the subarachnoid sensory or motor block produced by ropivacaine.
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Affiliation(s)
- Anteia Paraskeva
- Department of Anesthesiology, Aretaieio Hospital,Medical School, University of Athens, Athens, Greece
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Miranda H, Puig M, Romero M, Prieto J. Effects of tramadol and dexketoprofen on analgesia and gastrointestinal transit in mice. Fundam Clin Pharmacol 2009; 23:81-8. [DOI: 10.1111/j.1472-8206.2008.00636.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dürsteler C, Mases A, Puig MM. Universal PONV prophylaxis in general anesthesia: should we consider its immediate implementation? Anesth Analg 2008; 106:1922; author reply 1922-3. [PMID: 18499635 DOI: 10.1213/ane.0b013e318172c6f1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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White PF, Glass PSA. Universal PONV Prophylaxis in General Anesthesia: Should We Consider Its Immediate Implementation? Anesth Analg 2008. [DOI: 10.1213/ane.0b013e318172c8e5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Baba T, Shima Y, Owaki A, Mimura J, Oshima M, Fujii-Kuriyama Y, Morohashi KI. Disruption of aryl hydrocarbon receptor (AhR) induces regression of the seminal vesicle in aged male mice. Sex Dev 2008; 2:1-11. [PMID: 18418030 DOI: 10.1159/000117714] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Accepted: 01/02/2008] [Indexed: 11/19/2022] Open
Abstract
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that mediates diverse dioxin toxicities. Despite mediating the adverse effects, the AhR gene is conserved among animal species, suggesting important physiological functions for AhR. In fact, a recent study revealed that AhR has an intrinsic function in female reproduction, though its role in male reproduction is largely unknown. In this study, we show age-dependent regression of the seminal vesicles, probably together with the coagulating gland, in AhR(-/-) male mice. Knockout mice had abnormal vaginal plugs, low sperm counts in the epididymis, and low fertility. Moreover, serum testosterone concentrations and expression of steroidogenic 3betahydroxysteroiddehydrogenase (3betaHsd) and steroidogenic acute regulatory protein (StAR) in testicular Leydig cells were decreased in AhR(-/-) males. Taken together, our results suggest that impaired testosterone synthesis in aged mice induces regression of seminal vesicles and the coagulating glands. Such tissue disappearance likely resulted in abnormal vaginal plug formation, and eventually in low fertility. Together with previous findings demonstrating AhR function in female reproduction, AhR has essential functions in animal reproduction in both sexes.
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Affiliation(s)
- T Baba
- Division of Sex Differentiation, National Institute for Basic Biology, National Institutes of Natural Sciences, Higashiyama, Myodaiji-cho, Okazaki, Aichi, Japan
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Dürsteler C, Miranda HF, Poveda R, Mases A, Planas E, Puig MM. Synergistic interaction between dexamethasone and tramadol in a murine model of acute visceral pain. Fundam Clin Pharmacol 2007; 21:515-20. [PMID: 17868204 DOI: 10.1111/j.1472-8206.2007.00511.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tramadol is effective in the management of mild to moderate postoperative pain, but its administration is associated with nausea and vomiting. Patients treated with tramadol, often receive dexamethasone as antiemetic. The aim of our investigation was to assess if the two drugs interact in a murine model of acute visceral pain. Using the acetic acid writhing test in mice, we assessed the antinociceptive effects of tramadol and dexamethasone (a glucocorticoid with antiemetic effect) administrated individually and in a 1 : 1 fixed ratio combination. Tramadol and dexamethasone induced a dose-dependent inhibition of the writhing response when administered individually, with ED(50) values of 2.9 [2.09-4.31, 95% confidence limit (CL)] mg/kg, and 0.13 (0.05-0.29, 95% CL) mg/kg, respectively. The ED(50) of the combination was 0.13 (0.01-0.29, 95% CL) mg/kg; the isobolographic and interaction index analysis revealed a synergistic interaction. The results suggest that the combination of tramadol and dexamethasone could be beneficial in the management of postoperative pain in humans.
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Affiliation(s)
- Christian Dürsteler
- Department of Anaesthesiology, Hospital Universitario del Mar, Universitat Autònoma de Barcelona, Barcelona, Spain
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