A 22 year old heroin addict was admitted with tonic-clonic seizures, confusion and agitation 10 hours after taking mefenamic acid 5 grams orally and 2.25 grams intravenously. This appears to be the first recorded case of intravenous mefenamic acid abuse and, although not fatal, is a cause of concern. This is a commonly used drug and its seizure inducing potential is well recognised. It may therefore be worthwhile considering the possibility of intravenous abuse of mefenamic acid in heroin addicts admitted with confusion or seizures.
