What are the dosage options for acetazolamide?

• A. 125 mg, 250 mg, 750 mg ER
• B. 125 mg, 250 mg, 500 mg ER
• C. 50 mg, 100 mg, 200 mg
• D. 250 mg, 500 mg, 1000 mg ER

Answer: (B)

Acetazolamide is prescribed in a few standard tablet strengths to allow dosing to be adjusted and to fit patient tolerance. The common immediate‑release forms are 125 mg and 250 mg tablets, and there is a 500 mg extended‑release tablet. So the set that matches real-world available strengths is 125 mg, 250 mg, and 500 mg extended‑release. The other options include strengths that aren’t standard for acetazolamide tablets (like 50 mg, 100 mg, 200 mg) or imply ER doses such as 750 mg or 1000 mg that aren’t typical for this medication. In practice, dosing is tailored to effect and tolerability, with the extended‑release form offering less frequent dosing compared with the immediate‑release tablets.