antihistamine
/ˌæntiˈhɪstəmin/
noun
- A drug that reduces or prevents the effects of histamine, used to treat allergies and cold symptoms.
- She took an antihistamine to stop her sneezing during allergy season.
- Many antihistamines can cause drowsiness, so be careful before driving.
- The doctor recommended a non-drowsy antihistamine for his hay fever.