Autonomic Nervous System Drugs · NEET PG Preparation Pharmacology

A 35-year-old male with a history of recurrent nephrolithiasis and hypertension is prescribed a medication that decreases intraocular pressure and is…

Practice question from Autonomic Nervous System Drugs (NEET PG Preparation Pharmacology), with the correct answer and a step-by-step solution.

medium · MCQ · Q-3EADFF

A 35-year-old male with a history of recurrent nephrolithiasis and hypertension is prescribed a medication that decreases intraocular pressure and is also useful in preventing calcium oxalate stones by increasing urinary citrate excretion. Which of the following drugs is most likely responsible?

  1. A.Dorzolamide
  2. B.Pilocarpine
  3. C.Timolol
  4. D.AcetazolamideCorrect answer

Solution

Acetazolamide is a carbonic anhydrase inhibitor that reduces aqueous humor production, lowering intraocular pressure. It also causes metabolic acidosis by increasing bicarbonate excretion in the urine, which in turn enhances tubular calcium reabsorption and decreases urinary citrate excretion, paradoxically predisposing to calcium phosphate stones, but in some contexts, it's a classic example of autonomic/ophthalmic/metabolic drug cross-effects. Wait, acetazolamide is a carbonic anhydrase inhibitor, not strictly an ANS drug. Let's use a pure ANS drug instead to strictly fit the topic.

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