57. Which of the following is an ACE inhibitor?

Answer: B

Explanation:

Fosinopril is an ACE inhibitor.

Fosinopril is classified as an ACE inhibitor, which are medications commonly used to treat high blood pressure and heart failure by inhibiting the angiotensin-converting enzyme.

A) Nifedipine

Nifedipine is a calcium channel blocker, not an ACE inhibitor. It is primarily used to treat high blood pressure and angina by relaxing blood vessels, but it does not affect the angiotensin-converting enzyme.

B) Fosinopril

Fosinopril is indeed an ACE inhibitor. It works by blocking the enzyme that converts angiotensin I to angiotensin II, leading to vasodilation and reduced blood pressure, making it effective in treating hypertension and heart failure.

C) Fluoxetine

Fluoxetine is a selective serotonin reuptake inhibitor (SSRI) used primarily to treat depression, anxiety, and certain eating disorders. It does not belong to the class of ACE inhibitors and has no role in managing blood pressure.

D) Donepezil

Donepezil is a cholinesterase inhibitor used in the treatment of Alzheimer's disease. It functions by increasing levels of acetylcholine in the brain but is not related to the mechanism of ACE inhibitors.

Conclusion

Fosinopril is correctly identified as an ACE inhibitor, as it directly inhibits the angiotensin-converting enzyme, making it effective for hypertension and heart failure. In contrast, the other options, Nifedipine, Fluoxetine, and Donepezil, represent different classes of medications with distinct mechanisms and therapeutic uses, confirming that they do not fit the criteria for ACE inhibitors.