Antihistamines are commonly used in the management of allerg…
Antihistamines are commonly used in the management of allergic conditions such as allergic rhinitis and urticaria. These medications block histamine at H1 receptors, reducing symptoms like itching, swelling, and nasal congestion. Which of the following best describes the mechanism of action of first-generation H1-receptor antagonists, and what important patient education should be provided regarding their use?