Benadryl (diphenhydramine): diphenhydramine has a half life of 4-10 hours, so probably 8-20 hours for it to be cleared from your system
Answered 7/19/2015
2.5k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question