Tick the drug, inhibiting viral reverse transcriptase:

Correct Answer: A

Rationale: The correct answer is A: Zidovudine. Zidovudine is a nucleoside reverse transcriptase inhibitor that works by inhibiting the viral reverse transcriptase enzyme, essential for viral replication in HIV-infected cells. This action helps to slow down the progression of HIV infection. Vidarabine is an antiviral drug used to treat herpes simplex and varicella-zoster viruses, not HIV. Rimantadine is an antiviral drug used to treat and prevent influenza A virus infections by inhibiting viral replication, but it does not inhibit viral reverse transcriptase. Gancyclovir is an antiviral drug used to treat cytomegalovirus infections by inhibiting viral DNA polymerase, not reverse transcriptase.

Correct Answer: B

Rationale: The correct answer is B: Reduction of angiotensin-mediated vasoconstriction in the kidney. Captopril is an ACE inhibitor that works by blocking the conversion of angiotensin I to angiotensin II. In this patient with systolic heart failure, reducing angiotensin II levels will lead to vasodilation and decreased vasoconstriction in the kidney, improving renal blood flow and reducing fluid retention. This helps to alleviate symptoms of heart failure and improve overall cardiac function. Incorrect choices: A: Increased cardiac contractility - Captopril does not directly increase cardiac contractility. C: Reduction of preload and afterload - While ACE inhibitors can reduce preload and afterload, the primary mechanism of captopril is through the renin-angiotensin-aldosterone system. D: Stimulation of epinephrine release from adrenergic nerves - Captopril does not stimulate epinephrine release; it actually inhibits the

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.