1. Drugs or substances that counteract the effects of histamine in the body, used to treat allergies, itching, and other histamine-related conditions.
Usage: Usually used in plural form; also called antihistamines; Medical/pharmaceutical term

1. Of, relating to, or having the properties of a substance that blocks or reduces the effects of histamine.
Usage: Medical/pharmaceutical term

Examples

• The doctor prescribed antihistaminics to help manage her seasonal allergies.
• Common antihistaminics like cetirizine and loratadine are available over the counter.
• Antihistaminic medications can cause drowsiness in some patients.
• First-generation antihistaminics tend to have more side effects than newer formulations.
• She took an antihistaminic tablet before bed to reduce her itching.
• Antihistaminic drugs work by blocking histamine receptors in the body.