NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

What is the primary action of Aliskiren (Tekturna)?

1. Blocks beta-adrenergic receptors

2. Inhibits cholesterol synthesis

3. Blocks conversion of angiotensinogen to angiotensin I

4. Increases calcium absorption

The correct answer is: Blocks conversion of angiotensinogen to angiotensin I

Aliskiren, also known as Tekturna, is a medication used for high blood pressure. It works by blocking the conversion of angiotensinogen to angiotensin I, which helps to lower blood pressure. Option A is incorrect because blocking beta-adrenergic receptors is the primary action of beta blockers, not aliskiren. Option B is incorrect because inhibiting cholesterol synthesis is the primary action of statins, not aliskiren. Option D is incorrect because increasing calcium absorption is the primary action of vitamin D supplements, not aliskiren.