NDLI: Dose-independent occurrence of seizure with tramadol

Content Provider	Springer Nature Link
Author	Talaie, Haleh Panahandeh, Reyhaneh Fayaznouri, Mohammad Reza Asadi, Zahra Abdollahi, Mohammad
Copyright Year	2009
Abstract	Tramadol, as a centrally-acting, opioid-like analgesic with serotonin reuptake inhibition property, is one of the most prescribed analgesics in the world. We assessed the incidence of seizure, as it is one of the most important adverse effects.In a cross-sectional study, 215 cases of tramadol users or abusers who were admitted to Loghman-Hakim Hospital Poisoning Center (LHHPC) in Tehran during a 5-month period, from April 2007 to September 2007, were assessed to evaluate the occurrence of seizure. Patients with positive history of co-ingestion of other drugs, addiction, convulsive disorders, renal diseases, or head trauma with abnormal electroencephalography (EEG) or computerized tomography (CT) scan of the brain were excluded, thus 132 patients were included in the study. For patients who had seizure, CT scan of the brain and EEG were performed, and frequency and type of seizure were identified. Mean tramadol dose was compared between patients with and without seizure.Among the patients, 97 (73.5%) were male. Seizure occurred in 61 patients (46.2%) within 24 hours after tramadol ingestion. The majority of patients who had seizure were male (male, 83.6% vs. female, 16.4%). Mean tramadol dose was lower among females than males (males, 2413 mg vs. females, 1706 mg), but the difference was not statistically significant. Of 35 patients with documented seizure type, all showed generalized tonic-clonic seizure and 12 patients had abnormal EEG (35.3%). No statistically significant difference was observed in mean tramadol intake between patients with or without seizure. Analysis of patients with seizure, according to tramadol intake, indicated that most patients used tramadol in the dose range of 500–1000 mg followed in occurrence by 1500–2000 mg, then 100–500 mg, 2500–3000 mg, and 3500–4000 mg.Mean tramadol intake does not differ between patients with and without seizure, and the most common dose range in those with seizure is 500–1000 mg. We thus conclude that the incidence of seizure with tramadol is not dose dependent.
Starting Page	63
Ending Page	67
Page Count	5
File Format	PDF
ISSN	15569039
Journal	Journal of Medical Toxicology
Volume Number	5
Issue Number	2
e-ISSN	19376995
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	tramadol seizure toxicity Pharmacology/Toxicology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Toxicology

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