1. acting against or counteracting the effects of histamine; used to treat allergies and allergic reactions
Usage: medical/pharmaceutical term; often used in medical contexts

1. a drug or substance that counteracts the effects of histamine, used to relieve allergy symptoms
Usage: medical/pharmaceutical term; often used interchangeably with 'antihistamine'

Examples

• The doctor prescribed an antihistaminic medication to reduce her hay fever symptoms.
• Antihistaminic drugs are commonly used to treat hives and itching.
• Many over-the-counter antihistaminic products are available without a prescription.
• The antihistaminic effect of the medication helped her sleep through the night.
• Antihistaminic compounds work by blocking histamine receptors in the body.
• She took an antihistaminic tablet before traveling to prevent motion sickness and allergies.