Which medication in the regimen is an antihistamine?

Which medication in the regimen is an antihistamine?

• A. Paracetamol
• B. Cetirizine
• C. Amlodipine
• D. Bisoprolol

Answer: (B)

An antihistamine works by blocking histamine action at the H1 receptor, which helps relieve allergic symptoms such as sneezing, runny nose, itching, and hives. Cetirizine is a selective H1 receptor antagonist, commonly used for allergic rhinitis and urticaria, so it fits the role of an antihistamine in the regimen. Paracetamol is for pain and fever, amlodipine is a calcium channel blocker used for high blood pressure and angina, and bisoprolol is a beta-blocker used for heart-related conditions. These drugs do not act on histamine receptors, so they aren’t antihistamines.

An antihistamine works by blocking histamine action at the H1 receptor, which helps relieve allergic symptoms such as sneezing, runny nose, itching, and hives. Cetirizine is a selective H1 receptor antagonist, commonly used for allergic rhinitis and urticaria, so it fits the role of an antihistamine in the regimen.

Paracetamol is for pain and fever, amlodipine is a calcium channel blocker used for high blood pressure and angina, and bisoprolol is a beta-blocker used for heart-related conditions. These drugs do not act on histamine receptors, so they aren’t antihistamines.