How Much Of Diphenhydramine Is Lethal?
How Much Of Diphenhydramine Is Lethal? The estimated fatal oral dose of diphenhydramine is 20–40 mg/kg. In general, toxicity occurs after ingestion of 3–5 times the usual daily dose. Can diphenhydramine be lethal? Diphenhydramine overdose can be fatal. Peak serum levels of DPH are reached approximately 2–3 h after ingestion, and elimination half‐life is approximately