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Calcium Channel Blocker Intoxication: A Critical Care Transport Perspective. Air Med J 2020; 40:69-72. [PMID: 33455631 DOI: 10.1016/j.amj.2020.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/14/2020] [Accepted: 11/18/2020] [Indexed: 12/13/2022]
Abstract
Calcium channel blockers (CCBs) have seen an increase in rate of non-therapeutic exposure that is both accidental and intentional in nature. Patients experiencing the toxic effects of a CCB overdose are resource intensive and can quickly outstrip the capabilities of local health systems, necessitating transfer to larger tertiary or quaternary care centers. We present a case of intentional non-dihydropyridine CCB overdose and toxicity in a 20-year-old patient requiring initial stabilization at a referring critical access emergency department with continuation of treatment and support during a 60-minute rotor wing transport from the referring hospital to an academic quaternary care center. Emphasis is placed on the unique challenges in resuscitation and ongoing critical care administration during the transport phase of care. Proper stabilization of patients, planning, and consideration of potential problems associated with transport can help minimize stresses and risk of the transport, improving the outcome of extremely ill patients even under challenging circumstances.
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LeRoy JM, Boley SP, Corcoran JN, Engebretsen KM, Stellpflug SJ. Effect of Methylene Blue on a Porcine Model of Amlodipine Toxicity. J Med Toxicol 2020; 16:398-404. [PMID: 32495116 DOI: 10.1007/s13181-020-00780-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/07/2020] [Accepted: 04/28/2020] [Indexed: 10/24/2022] Open
Abstract
INTRODUCTION Calcium channel blocker (CCB) overdoses cause significant morbidity and mortality. Dihydropyridine CCBs cause peripheral vascular dilation and at high doses cardiac dysfunction. Amlodipine, a dihydropyridine, causes peripheral vasodilation from release of nitric oxide (NO) in addition to calcium channel blockade; NO scavenging is a potential treatment. Methylene blue (MB) inhibits NO directly and inhibits NO production. We compared the effects of MB versus norepinephrine (NE), with time to death as the primary outcome, in a porcine amlodipine toxicity model. METHODS Animals were anesthetized and instrumented, and an amlodipine infusion was administered to mimic oral overdose. After 70 minutes, each group was resuscitated with normal saline. Animals in each group were then randomized to receive either MB or NE. Hemodynamic parameters, including mean arterial pressure and cardiac output, were recorded every 10 minutes. The primary outcome was survival time (Kaplan-Meier analysis and log-rank test). RESULTS Interim analysis after 15 animals (7 MB, 8 NE) revealed that MB was clearly not superior to NE. Overall, 1 of 7 animals in the MB group survived to 300 minutes compared with 2 of 8 animals in the NE group. The median survival time was 100 minutes for the MB group and 177 minutes for the NE group. Survival time did not differ by group (log-rank test p = 0.29). CONCLUSION In this porcine model of amlodipine toxicity, methylene blue did not improve survival time compared with norepinephrine. Whether methylene blue is beneficial in combatting distributive shock in amlodipine toxicity remains unclear and requires further study.
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Affiliation(s)
- Jenna M LeRoy
- Department of Emergency Medicine, Regions Hospital, Saint Paul, MN, USA.
| | - Sean P Boley
- Department of Emergency Medicine, United Hospital, Saint Paul, MN, USA
| | - Justin N Corcoran
- Department of Emergency Medicine, Regions Hospital, Saint Paul, MN, USA
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Severe Polyantihypertensive Drug Poisoning: Unresponsive to Conventional Therapies Treated by Plasmapheresis. Am J Ther 2020; 28:e752-e755. [PMID: 32384316 DOI: 10.1097/mjt.0000000000001148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bartlett D. β-Blocker and Calcium Channel Blocker Poisoning: High-Dose Insulin/Glucose Therapy. Crit Care Nurse 2018; 36:45-50. [PMID: 27037338 DOI: 10.4037/ccn2016370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Overdoses of β-blockers and calcium channel blockers can produce significant morbidity and mortality, and conventional therapies often do not work as treatments for these poisonings. High-dose insulin/glucose therapy has been successful in reversing the cardiotoxic effects of these drugs in cases where the standard therapies have failed, and it appears to be relatively safe. Many successes have been well documented, but the clinical experience consists of case reports, the mechanisms of action are not completely understood, and guidelines for use of the therapy are empirically derived and not standardized. Regardless of these limitations, high-dose insulin/glucose therapy can be effective, it is often recommended by clinical toxicologists and poison control centers, and critical care nurses should be familiar with when and how the therapy is used.
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Affiliation(s)
- Dana Bartlett
- Dana Bartlett is an information specialist at the Connecticut Poison Control Center, Farmington, Connecticut.
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Treatment of Amlodipine Intoxication with Intravenous Lipid Emulsion Therapy: A Case Report and Review of the Literature. Cardiovasc Toxicol 2017; 17:482-486. [DOI: 10.1007/s12012-017-9421-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Richards JR, Garber D, Laurin EG, Albertson TE, Derlet RW, Amsterdam EA, Olson KR, Ramoska EA, Lange RA. Treatment of cocaine cardiovascular toxicity: a systematic review. Clin Toxicol (Phila) 2016; 54:345-64. [PMID: 26919414 DOI: 10.3109/15563650.2016.1142090] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Cocaine abuse is a major worldwide health problem. Patients with acute cocaine toxicity presenting to the emergency department may require urgent treatment for tachycardia, dysrhythmia, hypertension, and coronary vasospasm, leading to pathological sequelae such as acute coronary syndrome, stroke, and death. OBJECTIVE The objective of this study is to review the current evidence for pharmacological treatment of cardiovascular toxicity resulting from cocaine abuse. METHODS MEDLINE, PsycINFO, Database of Abstracts of Reviews of Effects (DARE), OpenGrey, Google Scholar, and the Cochrane Library were searched from inception to November 2015. Articles on pharmacological treatment involving human subjects and cocaine were selected and reviewed. Evidence was graded using Oxford Centre for Evidence-Based Medicine guidelines. Treatment recommendations were compared to current American College of Cardiology/American Heart Association guidelines. Special attention was given to adverse drug events or treatment failure. The search resulted in 2376 articles with 120 eligible involving 2358 human subjects. Benzodiazepines and other GABA-active agents: There were five high-quality (CEBM Level I/II) studies, three retrospective (Level III), and 25 case series/reports (Level IV/V) supporting the use of benzodiazepines and other GABA-active agents in 234 subjects with eight treatment failures. Benzodiazepines may not always effectively mitigate tachycardia, hypertension, and vasospasm from cocaine toxicity. Calcium channel blockers: There were seven Level I/II, one Level III, and seven Level IV/V studies involving 107 subjects and one treatment failure. Calcium channel blockers may decrease hypertension and coronary vasospasm, but not necessarily tachycardia. Nitric oxide-mediated vasodilators: There were six Level I/II, one Level III, and 25 Level IV/V studies conducted in 246 subjects with 11 treatment failures and two adverse drug events. Nitroglycerin may lead to severe hypotension and reflex tachycardia. Alpha-adrenoceptor blocking drugs: There were two Level I studies and three case reports. Alpha-1 blockers may improve hypertension and vasospasm, but not tachycardia, although evidence is limited. Alpha-2-adrenoceptor agonists: There were two high-quality studies and one case report detailing the successful use of dexmedetomidine. Beta-blockers and β/α-blockers: There were nine Level I/II, seven Level III, and 34 Level IV/V studies of β-blockers, with 1744 subjects, seven adverse drug events, and three treatment failures. No adverse events were reported for use of combined β/α-blockers such as labetalol and carvedilol, which were effective in attenuating both hypertension and tachycardia. Antipsychotics: Seven Level I/II studies, three Level III studies, and seven Level IV/V case series and reports involving 168 subjects have been published. Antipsychotics may improve agitation and psychosis, but with inconsistent reduction in tachycardia and hypertension and risk of extrapyramidal adverse effects. Other agents: There was only one high level study of morphine, which reversed cocaine-induced coronary vasoconstriction but increased heart rate. Other agents reviewed included lidocaine, sodium bicarbonate, amiodarone, procainamide, propofol, intravenous lipid emulsion, propofol, and ketamine. CONCLUSIONS High-quality evidence for pharmacological treatment of cocaine cardiovascular toxicity is limited but can guide acute management of associated tachycardia, dysrhythmia, hypertension, and coronary vasospasm. Future randomized prospective trials are needed to evaluate new agents and further define optimal treatment of cocaine-toxic patients.
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Affiliation(s)
- John R Richards
- a Department of Emergency Medicine , University of California Davis Medical Center , Sacramento , CA , USA
| | - Dariush Garber
- a Department of Emergency Medicine , University of California Davis Medical Center , Sacramento , CA , USA
| | - Erik G Laurin
- a Department of Emergency Medicine , University of California Davis Medical Center , Sacramento , CA , USA
| | - Timothy E Albertson
- b Department of Internal Medicine, Divisions of Toxicology, Pulmonary and Critical Care , University of California Davis Medical Center , Sacramento , CA , USA
| | - Robert W Derlet
- a Department of Emergency Medicine , University of California Davis Medical Center , Sacramento , CA , USA
| | - Ezra A Amsterdam
- c Department of Internal Medicine, Division of Cardiology , University of California Davis Medical Center , Sacramento , CA , USA
| | - Kent R Olson
- d Departments of Medicine and Clinical Pharmacy , University of California, San Francisco, Medical Director, California Poison Control System, San Francisco Division , San Francisco , CA , USA
| | - Edward A Ramoska
- e Department of Emergency Medicine , Drexel University , Philadelphia , PA , USA
| | - Richard A Lange
- f Department of Internal Medicine, Division of Cardiology , Texas Tech University Health Sciences Center , El Paso , TX , USA
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Zyoud SH, Al-Jabi SW, Sweileh WM, Waring WS. Scientific research related to calcium channel blockers poisoning: Bibliometric analysis in Scopus, 1968-2012. Hum Exp Toxicol 2015; 34:1162-70. [PMID: 25673180 DOI: 10.1177/0960327115571768] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE Calcium channel blockers (CCBs) were the most common agents associated with a significant morbidity and mortality rate. The main objective of this study was to examine the publication pattern related to CCBs poisoning at the global level using bibliometric analysis of articles published in SciVerse Scopus online database. METHODS Data were searched for documents that contained specific words regarding CCB poisoning as keywords in the title. No time period limitations were specified in the search regarding the starting year. The ending date of the search was 31 December 2012. RESULTS The criteria were met by 713 publications from 53 countries. The largest number of articles associated with CCBs was from the United States (30%), followed by the United Kingdom (7.4%), Japan (6%), and Germany (5.6%). No data related to CCBs were published from 159 (75%) of 212 countries registered in World Bank online database. There was no correlation between the number of published articles in the country and its population size (r = 0.03, p > 0.926). United Kingdom and Australia were the leading countries in terms of number of CCBs publications per million inhabitants (0.83 and 0.82 articles per million inhabitants, respectively), followed by the United States (0.68). Countries with a large population, such as India, tended to rank relatively low (0.01 articles per million inhabitants). The total number of citations at the time of data analysis (23 October 2014) was 6462, with an average of 9.1 citations per document. The highest median (interquartile range) number of citations was 8 (8-18) for the United States, followed by 6 (1-21) for Australia, 5 (1-15) for the United Kingdom, and 5 (1-24) for Canada. The h-index of the retrieved documents was 37. CONCLUSIONS Scientific production on CCBs poisoning is increasing; nonetheless, the international collaboration is still rare. The amount of CCBs-based research activity was low or not available in most countries. More regional epidemiological studies are required to bridge the gap in CCBs-based research and to promote better evaluation of CCBs poisoning worldwide.
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Affiliation(s)
- S H Zyoud
- Poison Control and Drug Information Center (PCDIC), College of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine Department of Clinical and Community Pharmacy, College of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine WHO Collaborating Centre for Drug Information, National Poison Centre, Universiti Sains Malaysia (USM), Penang, Malaysia
| | - S W Al-Jabi
- Department of Clinical and Community Pharmacy, College of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine
| | - W M Sweileh
- Department of Pharmacology and Toxicology, College of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine
| | - W S Waring
- Acute Medical Unit, York Teaching Hospital, NHS Foundation Trust, York, UK
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Burkes R, Wendorf G. A multifaceted approach to calcium channel blocker overdose: a case report and literature review. Clin Case Rep 2015; 3:566-9. [PMID: 26273444 PMCID: PMC4527798 DOI: 10.1002/ccr3.300] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 04/21/2015] [Accepted: 04/23/2015] [Indexed: 11/26/2022] Open
Abstract
Calcium channel blocker toxicity can be devastating. Initial therapy with fluid, calcium, and adrenoreceptor agonists should be prompt and novel therapies can be added if no response. Determining cardiogenic shock versus vasoplegia with echocardiogram or other hemodynamic monitoring may guide treatment options.
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Affiliation(s)
- Robert Burkes
- University of Louisville Internal Medicine Residency Training Program Louisville, Kentucky, USA
| | - Gregg Wendorf
- University of Louisville Internal Medicine Residency Training Program Louisville, Kentucky, USA
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Richards JR, Albertson TE, Derlet RW, Lange RA, Olson KR, Horowitz BZ. Treatment of toxicity from amphetamines, related derivatives, and analogues: a systematic clinical review. Drug Alcohol Depend 2015; 150:1-13. [PMID: 25724076 DOI: 10.1016/j.drugalcdep.2015.01.040] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 12/24/2014] [Accepted: 01/28/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND Overdose of amphetamine, related derivatives, and analogues (ARDA) continues to be a serious worldwide health problem. Patients frequently present to the hospital and require treatment for agitation, psychosis, and hyperadrenegic symptoms leading to pathologic sequelae and mortality. OBJECTIVE To review the pharmacologic treatment of agitation, psychosis, and the hyperadrenergic state resulting from ARDA toxicity. METHODS MEDLINE, PsycINFO, and the Cochrane Library were searched from inception to September 2014. Articles on pharmacologic treatment of ARDA-induced agitation, psychosis, and hyperadrenergic symptoms were selected. Evidence was graded using Oxford CEBM. Treatment recommendations were compared to current ACCF/AHA guidelines. RESULTS The search resulted in 6082 articles with 81 eligible treatment involving 835 human subjects. There were 6 high-quality studies supporting the use of antipsychotics and benzodiazepines for control of agitation and psychosis. There were several case reports detailing the successful use of dexmedetomidine for this indication. There were 9 high-quality studies reporting the overall safety and efficacy of β-blockers for control of hypertension and tachycardia associated with ARDA. There were 3 high-quality studies of calcium channel blockers. There were 2 level I studies of α-blockers and a small number of case reports for nitric oxide-mediated vasodilators. CONCLUSIONS High-quality evidence for pharmacologic treatment of overdose from ARDA is limited but can help guide management of acute agitation, psychosis, tachycardia, and hypertension. The use of butyrophenone and later-generation antipsychotics, benzodiazepines, and β-blockers is recommended based on existing evidence. Future randomized prospective trials are needed to evaluate new agents and further define treatment of these patients.
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Affiliation(s)
- John R Richards
- Department of Emergency Medicine, University of California Davis Medical Center, Sacramento, CA, United States.
| | - Timothy E Albertson
- Department of Internal Medicine, Divisions of Toxicology, Pulmonary and Critical Care, University of California Davis Medical Center, Sacramento, CA, United States; Northern California VA Medical System, Sacramento, CA, United States
| | - Robert W Derlet
- Department of Emergency Medicine, University of California Davis Medical Center, Sacramento, CA, United States
| | - Richard A Lange
- Department of Medicine, Division of Cardiology, University of Texas Health Sciences Center, San Antonio, TX, United States
| | - Kent R Olson
- Department of Medicine, University of California, San Francisco, CA, United States; Department of Clinical Pharmacy, University of California, San Francisco, California Poison Control System, San Francisco Division, San Francisco, CA, United States
| | - B Zane Horowitz
- Department of Emergency Medicine, Oregon Health Sciences University, Oregon Poison Center, Portland, OR, United States
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Ischemia complications after calcium channel blocker poisoning. Ann Emerg Med 2014; 63:90. [PMID: 24355373 DOI: 10.1016/j.annemergmed.2013.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 08/15/2013] [Accepted: 08/15/2013] [Indexed: 11/23/2022]
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Holger JS, Engebretsen KM, Stellpflug SJ, Cole JB, Kerns W. Critical care management of verapamil and diltiazem overdose with a focus on vasopressors: a 25-year experience at a single center. Ann Emerg Med 2014; 63:91-2. [PMID: 24355375 DOI: 10.1016/j.annemergmed.2013.10.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 10/11/2013] [Accepted: 10/14/2013] [Indexed: 10/25/2022]
Affiliation(s)
| | | | | | - Jon B Cole
- Hennepin County Medical Center, Minneapolis, MN
| | - William Kerns
- Carolinas Medical Center Emergency Department, Charlotte, NC
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