What is the primary function of antihistamines?

Antihistamines are primarily used to treat allergy symptoms by blocking the action of histamine, a chemical released during an allergic reaction. Histamine can cause symptoms such as sneezing, itching, runny nose, and hives when the body encounters allergens like pollen, pet dander, or certain foods. By inhibiting histamine’s effects, antihistamines alleviate these symptoms, making them a cornerstone of allergy management.

The other options relate to different medical conditions. For example, treating bacterial infections typically involves antibiotics, which target bacteria specifically. Reducing anxiety is managed through anti-anxiety medications, which act on neurotransmitters in the brain. Lowering blood pressure involves antihypertensive medications, which have mechanisms distinct from antihistamines. Each of these functions pertains to different aspects of health care, while antihistamines specifically focus on the allergic response.