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A 34-year-old member asked:

What is the limit of benadryl (diphenhydramine) allergy pills you should take as an adult?

2 doctor answers3 doctors weighed in
Dr. Alex Martinez
Specializes in Allergy
1-2 every 4-6 hrs: Benadryl (diphenhydramine) is an antihistamine used in the treatment of allergies. It doesn't work long so it has to be taken often. The recommended dose is 1 or 2 pills (each 25 mg) every 4-6 hours, so a maximum of 12 per day (300 mg/day). Taking any Benadryl can cause sleepiness, headaches, dry mouth, & difficulty urinating. Excess Benadryl can cause delirium, diarrhea, seizures, and even coma.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Jack Mutnick
Allergy and Immunology 18 years experience
Depends: Follow the directions on the bottle unless you have spoken with your physician who gave you a different instruction list. The maximum recommended daily dose (not all at once) is 300mg/day.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated May 6, 2015

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