DrugDrug interaction: Benadryl is a brand of diphenhydramine, an antihistamine available otc for treating allergies. Metronidazole is a prescription antibiotic. There are several interaction checkers available online. http://www.drugs.com/interactions-check.php?drug_list=1617-0, 896-1617 did not find any drug-drug interaction between these two. However, it's always best to tell your doc & pharmacist everything you take.
Answered 10/16/2018
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Yes: There are no drug drug interactions between Benadryl (diphenhydramine) and metronidazole.
Answered 4/7/2021
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