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Author: Admin | 2025-04-28
Benadryl, known by its medical name as diphenhydramine, is an antihistamine used to treat allergic reactions and seasonal allergies.Ingredients vary depending on the type of Benadryl medication being used, but all Benadryl medications contain diphenhydramine.A fatal dose of diphenhydramine is about 20 to 40 milligrams per kilogram (mg/kg).Learn more about the fatal doses of commonly abused drugs.What To Know About A Lethal Dose Of Benadryl (Diphenhydramine)The lethal dose of diphenhydramine depends on a few factors, such as the condition it’s being used to treat and the person’s age.The lethal dose of diphenhydramine has been estimated to be 20 to 40 mg per 1 kg for adults. For children, the lethal dose is 500 milligrams (mg).According to a 2013 report from the American Association of Poison Control Centers (AAPCC), most intoxication and overdose cases occur in children six years old and under.Children are at a higher risk of overdose than adults because they are more sensitive to the effects of antihistamines.How Likely Is Overdose On Benadryl (Diphenhydramine)?Studies have found that diphenhydramine toxicity is dose-dependent, meaning the effects of the drug change as the dose changes.If a person intentionally or unintentionally takes too much diphenhydramine, it can be lethal.While there have been fatal cases over the last few decades, death resulting from diphenhydramine overdose is not common.How Does Benadryl (Diphenhydramine) Overdose Happen?The lethal dose of 20 to 40 mg/kg is three to five times the recommended daily dose, so an overdose on Benadryl is intentional in most cases.A person might intentionally ingest a large amount of Benadryl in an act of suicide or self-harm.A study surveying drug-related deaths in the U.S. from 2011 to 2016 found that diphenhydramine is one of the top four most frequently mentioned drugs in suicide overdose cases.Others intentionally overdose to feel a high, although euphoria does not usually occur after taking Benadryl. In accidental cases, Benadryl is usually combined with other medications and substances.What Happens After A Benadryl Overdose?There are multiple signs of Benadryl overdose.Some of the non-life-threatening signs of overdose include:dry eyesblurred visiondry mouthdry, red skinringing in the earsdrowsinessinability to urinateAn overdose on Benadryl can cause a number of more serious and potentially fatal health risks.A few of these include:fetal malformations and complications in pregnant womenliver damagecardiac arrestheavy sedationunconsciousnessdepressionseizuresrapid heartbeathallucinationsA person who overdoses on Benadryl can develop anticholinergic symptoms (caused by drugs that block the action of the neurotransmitter acetylcholine), seizures, and coma.What To Do If
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