Antihistaminic Agents

An antihistaminic agent is a type of medication that blocks the action of histamine, a chemical released by the body during an allergic reaction.

Antihistaminic agents work by binding to histamine receptors in the body, preventing histamine from causing allergic symptoms such as itching, sneezing, and runny nose.

Antihistaminic agents are commonly used to relieve allergy symptoms, such as hay fever, hives, and itching. They can also be used to treat motion sickness and as sleep aids.

<p>Common side effects of antihistaminic agents include drowsiness, dry mouth, blurred vision, and constipation.</p> Signup and view all the answers

<p>Antihistaminic agents are classified into four generations based on their sedative effects and selectivity for histamine receptors.</p> Signup and view all the answers

<p>Antihistaminic agents should be used with caution or avoided in patients with narrow-angle glaucoma, urinary retention, and severe liver or kidney disease.</p> Signup and view all the answers