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Bhandari B, Siddique S, Tahir S, Link MG. Loperamide-Induced Torsades de Pointes. Cureus 2024; 16:e64427. [PMID: 39130993 PMCID: PMC11317118 DOI: 10.7759/cureus.64427] [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] [Received: 07/23/2020] [Accepted: 07/11/2024] [Indexed: 08/13/2024] Open
Abstract
Loperamide is a readily available, over-the-counter medication used to treat diarrhea. At therapeutic doses, loperamide exerts its effects mainly on the intestinal opioid receptors with minimal psychoactive effects; however, at supratherapeutic doses, it reaches central opioid receptors. With tighter regulations on opioid prescriptions, loperamide has emerged as a popular drug of abuse among opioid users. At supratherapeutic doses, loperamide can cause severe cardiac toxicity, resulting in wide QRS rhythms, severe bradycardia, prolonged QTc, polymorphic ventricular tachycardia, and cardiac arrest. We present the case of a 27-year-old female with a history of heroin abuse who suffered torsades de pointes resulting in cardiac arrest in the setting of a loperamide overdose.
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Affiliation(s)
- Binita Bhandari
- Hospital Medicine, University of Pittsburgh Medical Center (UPMC) Harrisburg, Harrisburg, USA
| | - Saima Siddique
- Cardiology, University of Pittsburgh Medical Center (UPMC) Harrisburg, Harrisburg, USA
| | - Sahar Tahir
- Hospital Medicine, University of Pittsburgh Medical Center (UPMC) Harrisburg, Harrisburg, USA
| | - Michael G Link
- Cardiology, University of Pittsburgh Medical Center (UPMC) Harrisburg, Harrisburg, USA
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2
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Risk of Cardiac Lesion with Chronic and Acute Use of Loperamide-An Integrative Review. J Cardiovasc Dev Dis 2022; 9:jcdd9120431. [PMID: 36547428 PMCID: PMC9782787 DOI: 10.3390/jcdd9120431] [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] [Received: 09/09/2022] [Revised: 11/22/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Loperamide is a synthetic opioid commonly used as an antidiarrheal due to its activation of u-opioid receptors in the myenteric plexus. In therapeutic doses, it inhibits peristalsis and has anti-secretory and anti-motility effects, until metabolized by intestinal and hepatic CYP3A4 and CYP2C8 into inactive metabolites. Furthermore, loperamide also inhibits L-type voltage-gated calcium (Ca2+) channels, increases action potential duration, and can induce arrhythmias and even cardiotoxicity, particularly when taken in extremely high doses. Thus, the aim of this study was to perform an integrative review of the available evidence in the recent literature on the cardiac risks of acute and chronic use of loperamide. In electrocardiogram (ECG) analysis, the most common finding was QTc prolongation in 27 cases, followed by QRS prolongation, first-degree atrioventricular (AV) block, torsades de pointes, ventricular tachycardia, and right bundle branch block. As for the symptoms encountered, syncope, weakness, palpitations, lightheadedness, shortness of breath, nausea, vomiting, bradycardia, and cardiac arrest were the most common. Loperamide can inhibit hERG voltage-gated potassium (K+) channels (Kv11.1), leading to the prolongation of repolarization, QTc interval prolongation, and increased risk of torsades de pointes. In addition, loperamide can inhibit voltage-gated sodium (Na+) channels (Nav1.5), impairing electrical cardiac conduction and potentiating QRS interval widening. Therefore, QTc prolongation, torsades de pointes, and other ECG alterations are of particular concern regarding loperamide toxicity, particularly when overdosed.
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The Effect of Electroacupuncture Treatment with Different Intensities for Functional Diarrhea: A Randomized Controlled Trial. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:2564979. [PMID: 35027932 PMCID: PMC8752238 DOI: 10.1155/2022/2564979] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 12/11/2021] [Indexed: 12/15/2022]
Abstract
Background Electroacupuncture (EA) may have a role in the treatment of diarrhea symptoms. However, the efficacy and safety of EA with different current intensities in improving gastrointestinal function, psychology, and quality of life (QOL) of functional diarrhea (FD) remain unknown. Objective To investigate the efficacy and safety of EA with different current intensities in improving gastrointestinal function, psychology, and QOL for FD patients. Methods 73 FD patients were randomly divided into three groups: low current intensity group (LI) of EA, high current intensity group (HI) of EA, and loperamide control group (LC). Four weeks of treatment were provided in the three groups. The primary outcome was the proportion of normal defecation. Additional outcomes included the change from baseline for the weekly spontaneous bowel movements (SBMs) and the change from baseline for the mean Bristol Stool Form Scale (BSFS). QOL was assessed by the 36-item short-form health survey (SF-36). Self-rating Anxiety Scale (SAS) and Self-rating Depression Scale (SDS) were used to assess the psychology state. Results Low current intensity of EA significantly improved the proportion of normal defecation during treatment and follow-up period (P < 0.01). EA significantly improves the mean BSFS scores and weekly SBMs, and this efficacy is equivalent to loperamide (P < 0.05). The SF-36 scores of general health in LI and HI groups and vitality and mental health in LI group were significantly increased compared to baseline (P < 0.05). Low current intensity of EA can significantly improve SAS and SDS scores (P < 0.05). Conclusions EA significantly improved stool consistency and weekly SBMs in FD patients. Compared with loperamide, low current intensity of EA may have a better sustainable effect in restoring normal defecation in patients with FD, and it can also effectively improve QOL, anxiety, and depression. However, larger sample sizes are needed to determine safety and efficacy. Trial registration number: NCT01274793.
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Isang E, Shali L, Morris CB, Mahlow J. Loperamide-Induced Torsades de Pointes. Cureus 2021; 13:e20299. [PMID: 35028205 PMCID: PMC8747988 DOI: 10.7759/cureus.20299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2021] [Indexed: 11/18/2022] Open
Abstract
Loperamide, an over-the-counter antidiarrheal, works on the µ opioid receptor with minimal opioid activity if taken as directed. Recently, it has gained popularity as the “poor man's methadone” at supratherapeutic dosing. Opioid antagonism with naloxone is beneficial in reversing respiratory depression but has no effect on cardiotoxicity due to the human ether-a-go-go-related gene (hERG). We present the case of a 34-year-old female who presented for syncope after taking 48 tablets of 2 mg loperamide. On arrival, she was obtunded with variable heart block and a QTc of 560 ms. Subsequently, due to further QT prolongation from loperamide to 656 ms, she developed Torsades de Pointes requiring defibrillation at 120 J twice. Ultimately, she was discharged home with psychiatric and substance abuse outpatient follow-up. Patients and healthcare providers face new challenges with the increase in loperamide misuse due to easy access and delayed identification. It is important for clinicians to recognize and be familiar with loperamide overdose given the potential for multiorgan failure and increased mortality.
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Effects of opioid receptor agonist and antagonist medications on electrocardiogram changes and presentation of cardiac arrhythmia: review article. J Interv Card Electrophysiol 2021; 63:471-500. [PMID: 34674120 DOI: 10.1007/s10840-021-01072-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/03/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND/PURPOSE Mortality associated with prescription opioids has significantly increased over the past few decades and is considered a global pandemic. Prescribed opioids can cause cardiac arrhythmias, leading to fatal outcomes and unexpected death, even in the absence of structural cardiac disease. Despite the extent of cardiac toxicity and death associated with these medications, there is limited data to suggest their influences on cardiac electrophysiology and arrhythmias, with the exception of methadone. The goal of our review is to describe the possible mechanisms and to review the different ECG changes and arrhythmias that have been reported. METHODS A literature search was performed using Google Scholar, PubMed, Springer, Ovid, and Science Direct to identify studies that demonstrated the use of prescription opioids leading to electrocardiogram (ECG) changes and cardiac arrhythmias. RESULTS Many of the commonly prescribed opioid medications can uniquely effect the ECG, and can lead to the development of various cardiac arrhythmias. One of the most significant side effects of these drugs is QTc interval prolongation, especially when administered to patients with a baseline risk for QTc prolongation. A prolonged QTc interval can cause lethal torsades de pointes and ventricular fibrillation. Obtaining an ECG at baseline, following a dosage increase, or after switching an opioid medication, is appropriate in patients taking certain prescribed opioids. Opioids are often used first line for the treatment of acute and chronic pain, procedural sedation, medication opioid use disorders, and maintenance therapy. CONCLUSIONS To reduce the risk of cardiac arrhythmias and to improve patient outcomes, consideration of accurate patient selection, concomitant medications, electrolyte monitoring, and vigilant ECG monitoring should be considered.
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Daoub M, Cawley P, Sahu J. Loperamide-induced ventricular tachycardia storm. THE BRITISH JOURNAL OF CARDIOLOGY 2021; 28:46. [PMID: 35747063 PMCID: PMC9063705 DOI: 10.5837/bjc.2021.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Loperamide is an over-the-counter, peripherally-acting, μ-opioid receptor agonist commonly used in the treatment of diarrhoea. It has increasingly been recognised as a potential drug of misuse, having previously been thought to have low potential for abuse owing to its low bioavailability and poor penetration of the central nervous system. High doses can result in life-threatening cardiac-toxicity. We present a case of a young woman who had been self-treating her depression with high doses of loperamide for one year, who then presented to hospital with syncope secondary to ventricular tachycardia (VT). While in the emergency department (ED) the patient had monomorphic pulseless VT requiring electrical cardioversion multiple times. Transfer to a tertiary cardiac centre was immediately arranged after she was stabilised and intubated. This complicated the diagnostic process as a thorough history could not be obtained on arrival to the tertiary centre, which meant the loperamide misuse only came to light multiple days into admission, after the patient was extubated. The final diagnosis of loperamide-induced secondary long-QT syndrome was made and the patient made a full recovery.
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Affiliation(s)
| | - Philippa Cawley
- Internal Medical Trainee Northern General Hospital, Sheffield, S5 7AU
| | - Jonathan Sahu
- Consultant Cardiologist/Electrophysiologist Northern General Hospital, Sheffield, S5 7AU
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Betting DJ, Chenoweth JA, Jarman AF. A Case Report of Cardiogenic Syncope Due to Loperamide Abuse: Acute Presentation and Novel Use of Buprenorphine. Clin Pract Cases Emerg Med 2021; 5:214-217. [PMID: 34437008 PMCID: PMC8143836 DOI: 10.5811/cpcem.2021.3.51152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 03/12/2021] [Indexed: 11/29/2022] Open
Abstract
Introduction Loperamide is a non-prescription anti-diarrheal agent targeting μ-opioid receptors in the intestinal tract. At high doses it crosses the blood-brain barrier, where μ-opioid agonism can cause euphoric effects. Misuse has been increasing for both the euphoric effects and as an alternative treatment for opioid dependence and withdrawal. Case Report Here we report the case of a 30-year-old woman presenting with syncope, who was found to have severe myocardial conduction delays in the setting of chronic loperamide abuse. Conclusion Treatment with sodium bicarbonate and hypertonic sodium resulted in improvement of her conduction abnormalities. Prior to discharge she was initiated on buprenorphine for her opioid use disorder.
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Affiliation(s)
- David J Betting
- UC Davis Medical Center, Department of Emergency Medicine, Sacramento, California
| | - James A Chenoweth
- UC Davis Medical Center, Department of Emergency Medicine, Sacramento, California
| | - Angela F Jarman
- UC Davis Medical Center, Department of Emergency Medicine, Sacramento, California
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Malinky CA, Lindsley CW, Han C. DARK Classics in Chemical Neuroscience: Loperamide. ACS Chem Neurosci 2021; 12:2964-2973. [PMID: 34346690 DOI: 10.1021/acschemneuro.1c00382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Loperamide, a popular and inexpensive over-the-counter antidiarrheal medicine, is a potent μ-opioid receptor agonist approved by the U.S. Food and Drug Administration (FDA). It has been on the market since 1976 and is relatively safe with no central nervous system-related side effects when used for a short period of time at the recommended therapeutic dose (2-8 mg/day). In recent years, loperamide has become notoriously known as the "poor man's methadone" for people with substance dependence due to the increase in loperamide overdoses from self-administered medication to treat opioid withdrawal symptoms. As a result, in 2018, the FDA decided to limit the available packaged dose of loperamide to stop prominent abuse. This review provides the synthesis and chemical properties of loperamide as well as the pharmacology and adverse effects of its use and the social effects of such abuse.
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Affiliation(s)
- Cori A. Malinky
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Craig W. Lindsley
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, United States
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
| | - Changho Han
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
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Iqbal S, Fayyaz SM, Saeed Y, Aqeel M. Loperamide-induced cardiotoxicity: a case overlooked? BMJ Case Rep 2021; 14:14/7/e243325. [PMID: 34290024 DOI: 10.1136/bcr-2021-243325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
A young man presented to the emergency department with seizures and recurrent episodes of polymorphic ventricular tachycardia (PMVT)/torsades de pointes (TdP) requiring cardioversion and administration of intravenous magnesium. A battery of tests performed to identify a cause for his arrhythmias and seizures were all normal. A revisit of history with family revealed he had consumed over 100 tablets/day of loperamide for the past 1 year. A prolonged QT interval on his ECG raised concerns for long QT syndrome (LQTS) (congenital or acquired). Our patient was suspected to have loperamide-induced cardiotoxicity. TdP is a specific PMVT that occurs with a prolonged QT interval and is usually drug-induced. Less frequently, congenital LQTS may be implicated. With supportive care, including mechanical ventilation, vasopressors and temporary transvenous overdrive pacing, our patient recovered completely. We describe the importance of a systematic and time-sensitive approach to diagnosing critical illness. Loperamide overdose may cause QT prolongation, life-threatening arrhythmias/cardiogenic shock, or cardiac arrest. Seizures/epilepsy may also be a manifestation in young patients. There is a substantial need to revisit the safety of over-the-counter medications and increasing awareness of manifestations of drug overdose.
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Affiliation(s)
- Sameen Iqbal
- Section of Cardiology, Department of Medicine, The Aga Khan University, Karachi, Pakistan
| | - Sidra Malik Fayyaz
- Section of Pulmonology & Critical Care Medicine, Department of Medicine, The Aga Khan University, Karachi, Pakistan
| | - Yawer Saeed
- Section of Cardiology, Department of Medicine, The Aga Khan University, Karachi, Pakistan
| | - Masooma Aqeel
- Section of Pulmonology & Critical Care Medicine, Department of Medicine, The Aga Khan University, Karachi, Pakistan
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Jones J, Lembo A, Heidelbaugh J, Kuritzky L, Lacy B. Management of irritable bowel syndrome with diarrhea: focus on eluxadoline. Curr Med Res Opin 2021; 37:567-578. [PMID: 33566707 DOI: 10.1080/03007995.2021.1888705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE We sought to summarize current recommendations for the diagnosis of diarrhea-predominant irritable bowel syndrome (IBS-D) and describe available management options, highlighting a newer US Food and Drug Administration (FDA)-approved agent, eluxadoline. METHODS Literature on IBS-D was assessed up to January 2020 using PubMed, with key search terms including "IBS-D diagnosis", "IBS-D management", and "eluxadoline". RESULTS IBS is a common gastrointestinal disorder affecting up to 14% of US adults and is particularly prevalent in women and those aged under 50. Symptoms include abdominal pain associated with altered bowel habits (i.e. diarrhea and/or constipation subtyped based on the predominant stool pattern). As IBS-D is challenging to manage with varying symptom severity, effective treatment requires a personalized management approach. Evidence-based therapeutic options endorsed by the American Gastroenterological Association and the American College of Gastroenterology can be used to effectively guide treatment. Dietary and lifestyle modifications, including adequate hydration, reducing caffeine and alcohol intake, and increasing soluble fiber intake may lead to symptom improvement. Over-the-counter medications such as loperamide are frequently recommended and may improve stool frequency and rectal urgency; however, for the outcome of abdominal pain, mixed results have been observed. Several off-label prescription medications are useful in IBS-D management, including tricyclic antidepressants, bile acid sequestrants, and antispasmodics. Three prescription medications have been approved by the FDA for IBS-D: alosetron, eluxadoline, and rifaximin. CONCLUSIONS IBS-D can be effectively managed in the primary care setting in the absence of alarm features. Benefits and risks of pharmacologic interventions should be weighed during treatment selection.
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Affiliation(s)
- Jennifer Jones
- UCF College of Medicine, HCA Consortium Family Medicine Residency, Gainesville, FL, USA
| | - Anthony Lembo
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Joel Heidelbaugh
- Departments of Family Medicine and Urology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Louis Kuritzky
- Department of Community Health and Family Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Brian Lacy
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL, USA
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11
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Geng M, Lin A, Nguyen TP. Revisiting Antiarrhythmic Drug Therapy for Atrial Fibrillation: Reviewing Lessons Learned and Redefining Therapeutic Paradigms. Front Pharmacol 2020; 11:581837. [PMID: 33240090 PMCID: PMC7680856 DOI: 10.3389/fphar.2020.581837] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/17/2020] [Indexed: 12/12/2022] Open
Abstract
Since the clinical use of digitalis as the first pharmacological therapy for atrial fibrillation (AF) 235 years ago in 1785, antiarrhythmic drug therapy has advanced considerably and become a cornerstone of AF clinical management. Yet, a preventive or curative panacea for sustained AF does not exist despite the rise of AF global prevalence to epidemiological proportions. While multiple elevated risk factors for AF have been established, the natural history and etiology of AF remain incompletely understood. In the present article, the first section selectively highlights some disappointing shortcomings and current efforts in antiarrhythmic drug therapy to uncover reasons why AF is such a clinical challenge. The second section discusses some modern takes on the natural history of AF as a relentless, progressive fibro-inflammatory "atriomyopathy." The final section emphasizes the need to redefine therapeutic strategies on par with new insights of AF pathophysiology.
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Affiliation(s)
| | | | - Thao P. Nguyen
- Division of Cardiology, Department of Medicine, The Cardiovascular Research Laboratory, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
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12
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Ali Z, Shoukat U, Khan M, Roomi S, Ullah W. ' Loperamide overdose induces ventricular tachycardia with catastrophic outcomes'. J Community Hosp Intern Med Perspect 2020; 10:229-232. [PMID: 32850070 PMCID: PMC7426977 DOI: 10.1080/20009666.2020.1766839] [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] [Indexed: 12/19/2022] Open
Abstract
Loperamide is a widely available, over-the-counter medication. The advent of the opioid epidemic has seen cases of loperamide overdose being reported. The common side effects of the medication can be relatively benign, but at high doses, loperamide can precipitate life-threatening arrhythmias. Our case highlights rare side effects of loperamide overdose inducing ventricular tachycardia, with unfavorable consequences. This case emphasizes that the distribution and availability of this medication should be restricted, to be a prescription drug, to prevent overdose and adverse outcomes.
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Affiliation(s)
- Zain Ali
- Physician, Internal Medicine, Abington Memorial Hospital, Abington, PA, USA
| | - Umer Shoukat
- Physician, Internal Medicine, Abington Memorial Hospital, Abington, PA, USA
| | - Mariya Khan
- Civil Hospital, Karachi, Dow University of Health Sciences, Karachi, Pakistan
| | - Sohaib Roomi
- Resident Physician, Internal Medicine, Abington Memorial Hospital, Abington, PA, USA
| | - Waqas Ullah
- Physician, Internal Medicine, Abington Memorial Hospital, Abington, PA, USA.,Civil Hospital, Karachi, Dow University of Health Sciences, Karachi, Pakistan.,Resident Physician, Internal Medicine, Abington Memorial Hospital, Abington, PA, USA
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Ali M, Mujahid A, Bulathsinghala CP, Surani S. Cardiac Arrhythmia Secondary to Loperamide Abuse and Toxicity. Cureus 2020; 12:e6936. [PMID: 32190488 PMCID: PMC7067360 DOI: 10.7759/cureus.6936] [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] [Indexed: 11/29/2022] Open
Abstract
Loperamide is a synthetic, over-the-counter, antidiarrheal medication that is widely available and used for the treatment of diarrhea. It is a peripherally acting opioid agonist acting mostly on the μ-opioid receptors in the gut. It was thought to be a very safe medication up until very recently, as the bioavailability of the drug is very low. At significantly higher doses, it is able to cross the blood-brain barrier and mimic the effects of centrally acting opioids. However, at these significantly high doses it also leads to significant cardiotoxic consequences. Here we present a case of a 31-year-old male with significant cardiotoxicity secondary to misuse and abuse of loperamide.
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Affiliation(s)
- Mohammed Ali
- Pulmonary and Critical Care Medicine, Corpus Christi Medical Center, Corpus Christi, USA
| | - Aisha Mujahid
- Medicine, Shadan Institute of Medical Sciences, NTR University of Health Sciences, Hyderabad, IND
| | | | - Salim Surani
- Internal Medicine, Texas A&M Health Science Center, Bryan, USA
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15
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Webb NE, Wood DM, Black JC, Amioka E, Dart RC, Dargan PI. Non-medical use of loperamide in the UK and the USA. QJM 2020; 113:25-30. [PMID: 31424512 DOI: 10.1093/qjmed/hcz215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/07/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Loperamide is a mu-opioid receptor agonist that is available as an over-the-counter anti-motility agent in the US and UK; recommended maximum doses of 12-16 mg/day. Anecdotal reports of non-medical use (NMU) have increased over the past decade with supra-therapeutic doses (70-800 mg/day) associated with cardiotoxicity. Little data exists on the prevalence of loperamide NMU. AIM The aim of this study was to determine the prevalence of loperamide NMU in the UK and US and to describe characteristics of non-medical loperamide users. DESIGN The Researched, Abuse, Diversion and Addiction Related Surveillance (RADARS® ) Survey of Nonmedical Use of Prescription Drugs (NMURx) was utilized to study NMU of loperamide among the adult population in the UK and US in 2017. The RADARS® NMURx is anonymous and self-administered online. METHODS A total of 40,029 completed surveys were included (10,019 from the UK and 30,010 from the US). Respondents were asked questions about medical and NMU of loperamide, frequency of and reasons for NMU, route of use problematic drug use markers, and demographics. RESULTS Prevalence of lifetime loperamide use (95% CI) and lifetime NMU of loperamide were: UK 28.5% (27.67-29.4), and 0.66% (0.5-0.8), respectively; US 33.7% (33.1-34.2), and 5.19% (4.9-5.5), respectively. Problematic drug use markers were elevated in those who reported NMU of loperamide in both the UK and US, however high-risk use was more prevalent in the UK than in the US. CONCLUSION NMU of loperamide is common. In the current international environment of opioid addiction involving both therapeutic and illicit opioids, awareness of the NMU of loperamide is important.
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Affiliation(s)
- N E Webb
- Clinical Toxicology Department, St Thomas' Hospital, Westminster Bridge Road London, London, UK
| | - D M Wood
- Clinical Toxicology Department, St Thomas' Hospital, Westminster Bridge Road London, London, UK
- Faculty of Life Sciences and Medicine, King's College London, Strand, London, London, UK
| | - J C Black
- Rocky Mountain Poison and Drug Center, 1391 Speer Boulevard, Suite 600, Denver, CO, USA
| | - E Amioka
- Rocky Mountain Poison and Drug Center, 1391 Speer Boulevard, Suite 600, Denver, CO, USA
| | - R C Dart
- Rocky Mountain Poison and Drug Center, 1391 Speer Boulevard, Suite 600, Denver, CO, USA
| | - P I Dargan
- Clinical Toxicology Department, St Thomas' Hospital, Westminster Bridge Road London, London, UK
- Faculty of Life Sciences and Medicine, King's College London, Strand, London, London, UK
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Gauvin DV, Zimmermann ZJ, Baird TJ. In further defense of nonclinical abuse liability testing of biologics. Regul Toxicol Pharmacol 2018; 101:103-120. [PMID: 30465804 DOI: 10.1016/j.yrtph.2018.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 01/12/2023]
Abstract
Risk assessment is not a choice. Drug Abuse Liability (DAL) is mandated under international and national drug control statutes for all drugs targeting the CNS. Once administered to humans many biologics may have long-lived or permanent physiological effects that make DAL testing arduous. We respond to premises of a recently published position on DAL testing of biologics by de Zafra et al. (2018). We propose that, at a minimum, Sponsors submitting a Biologics Licensure Application (BLA) must think "outside the box" and include differential study designs for the same three core small NME assays detailed in the current DAL guidelines (self-administration, drug discrimination, and dependence liability). Abuse liability testing for drug scheduling decisions for marketing approval are not excluded or limited from risk assessment analysis simply because the entity is a biologic. In fact, more robust study designs may be necessary to address alterations in the reinforcing and discriminative stimulus effects of common drugs of abuse, as well as the dependence liability of the biologic, itself.
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Schifano F, Chiappini S. Is there such a thing as a 'lope' dope? Analysis of loperamide-related European Medicines Agency (EMA) pharmacovigilance database reports. PLoS One 2018; 13:e0204443. [PMID: 30286103 PMCID: PMC6171858 DOI: 10.1371/journal.pone.0204443] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/07/2018] [Indexed: 12/02/2022] Open
Abstract
Background Among over-the-counter (OTC) drugs, loperamide has recently emerged for its potential of misuse and cardiotoxicity issues. Hence, we aimed here at assessing the loperamide-related cases being reported to the EMA's EudraVigilance (EV) database. Methods All spontaneous EV reports relating to loperamide misuse/abuse/dependence/withdrawal and cardiotoxicity issues were here retrieved, performing a descriptive analysis. Findings During the years 2005–2017, EV collected a number of 1,983 (out of a total of 7,895; 25.11%) loperamide-related misuse/abuse/dependence/withdrawal adverse drug reaction (ADR) reports, with a progressively increasing trend since 2014. Most cases were classified as drug use disorder (37.4%) or intentional overdose (25.4%). Loperamide was used on its own in 41.9% of cases; remaining, polydrug, cases included antidepressants; benzodiazepines; and other OTCs. Some 1,085 (1,085/7,895 = 13.7%) cardiovascular ADRs were reported, being conduction abnormalities and EKG alterations the most frequently identified. Conclusions EV data may support the levels of concern relating to loperamide potential of abuse and associated cardiotoxicity issues.
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Affiliation(s)
- Fabrizio Schifano
- Psychopharmacology, Drug Misuse, and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Herts, United Kingdom
| | - Stefania Chiappini
- Psychopharmacology, Drug Misuse, and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Herts, United Kingdom
- Casa di Cura Villa Rosa, Viterbo (VT), Italy
- * E-mail:
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Akel T, Bekheit S. Loperamide cardiotoxicity: "A Brief Review". Ann Noninvasive Electrocardiol 2017; 23:e12505. [PMID: 29125226 DOI: 10.1111/anec.12505] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 08/31/2017] [Indexed: 01/20/2023] Open
Abstract
Loperamide is a popular antidiarrheal medication that has been used for many years. It is currently gaining more attention among healthcare professionals due to its increasing potential for side effects. At present, it is considered safe enough to be sold over the counter. In contrast with other opioid agonists, loperamide is a peripherally acting μ-receptor agonist exerting its effects mainly on the myenteric plexus of the gastrointestinal longitudinal muscle layer. It decreases peristalsis and fluid secretion resulting in longer gastrointestinal transit time. The bioavailability of the drug is extremely low. Moreover, it is actively excluded from the central nervous system; hence, it lacks the central effects of euphoria and analgesia at the recommended dosages. Loperamide abuse has been steadily increasing in the United States. Abusers typically ingest high doses in desire to achieve a satisfactory central nervous system drug penetration. This has made it a potential over the counter substitute for self-treating opioid withdrawal symptoms and achieving euphoric effects.
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Affiliation(s)
- Tamer Akel
- Department of Internal Medicine, Staten Island University Hospital, Staten Island, NY, USA
| | - Soad Bekheit
- Department of Electrophysiology, Staten Island University Hospital, Staten Island, NY, USA
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