antihistamines

1. Drugs that counteract the effects of a substance in the body called histamine. The body releases histamine, which causes many of the symptoms associated with allergies (sneezing, watery eyes, runny nose), in response to external agents such as pollen .

Example Sentences

If you think antihistamines are making you sleepy, ask your doctor about non-sedating meds to control your symptoms.

From The Daily Beast

Several years ago many such tests were carried out with antihistamines to prevent colds.

From Project Gutenberg