DefinitionMeperidine hydrochloride is a painkiller. Meperidine hydrochloride overdose occurs when someone accidentally or intentionally takes more than the normal or recommended amount of this medication.This is for information only and not for use in the treatment or management of an actual poison exposure. If you have an exposure, you should call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222.Alternative NamesDemerol overdose; Mepergan Forte overdosePoisonous IngredientMeperidineWhere FoundDemerolMepergan ForteSymptomsEyes, ears, nose, and throat Small pupils (may be normal)Gastrointestinal ConstipationNauseaSpasms of the stomach or intestinesVomitingHeart and blood Low blood pressureWeak pulseLungs Breathing problemsBreathing stopsShall