Important Warning From the FDA About Benadryl Active Ingredient! FDA is warning that taking higher than recommended doses of the common over-the-counter (OTC) allergy medicine Benadryl (diphenhydramine) can lead to serious heart problems, seizures, coma, or even death https://www.fda.gov/safety/medical-product-safety-information/benadryl-diphenhydramine-drug-safety-communication-serious-problems-high-doses-allergy-medicine . I see many patients who take higher than recommended doses of diphenhydramine (Benadryl, Zzz-Quil products,…

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