Primary Open-Angle Glaucoma (POAG) Spectrum Practice Test

What is the dosage of methazolamide (neptazane)?

10 mg, 20 mg 25 mg, 50 mg 100 mg, 200 mg 5 mg, 15 mg

Correct Answer:

25 mg, 50 mg

Explanation:

Methazolamide is a systemic carbonic anhydrase inhibitor used to lower intraocular pressure in POAG, and it is formulated as oral tablets in two common strengths. The standard tablet strengths are 25 mg and 50 mg, so the appropriate dosage options reflect these two strengths. In practice, the dose is given in divided amounts (often 25–50 mg per dose, with adjustments based on response and renal function), but for this question the key point is the available tablet strengths. The other numeric options don’t correspond to the standard Neptazane tablet strengths.

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