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A female asked:

hi, i have allergic rhinitis and asthma, since my allergies are very strong i drink allegra daily can i take benadryl (diphenhydramine) at night?

1 doctor answer1 doctor weighed in
Dr. Colette Wiseman
Internal Medicine 14 years experience
Yes: one dose of benadryl (diphenhydramine) at night (25mg) is safe. However use it only when absolutely necessary. Antihistamine overdose can make you dehydrated, have a fast heart rate and feel anxious.

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Last updated Aug 7, 2016

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