diphenhydramine
/ˌdaɪfɛnˈhaɪdrəˌmin/
noun
- A medicine used to treat allergies, hay fever, and cold symptoms, and also to help with sleep.
- She took diphenhydramine for her itchy eyes and sneezing.
- Diphenhydramine is the active ingredient in many over-the-counter allergy pills.
- The doctor recommended diphenhydramine to help him sleep during the long flight.