noun
- a common antihistamine drug used to treat allergies, itching, and insomnia
Usage: medical/pharmaceutical term; often sold under brand names such as Benadryl
Examples
- She took diphenhydramine to relieve her allergy symptoms.
- Diphenhydramine is available over the counter at most pharmacies.
- The doctor recommended diphenhydramine for the patient's severe itching.
- Many cold and flu medicines contain diphenhydramine as an active ingredient.
- Diphenhydramine can cause drowsiness, so it is not recommended before driving.