Product Information
ACETAZOLAMIDE ER 500 MG CAP is a generic product labeled by Heritage Pharmaceuticals Inc., priced at $0.2882 per EA under NDC 23155078701. Its NADAC has been published 287 times since Apr 7, 2021.
FDA first approved this application on Dec 10, 2008. Its Orange Book therapeutic-equivalence code is AB — FDA rates it therapeutically equivalent to (substitutable for) its reference product.
Strength
500 mg/1
Manufacturer
Heritage Pharmaceuticals Inc.NDC
23155078701
Classification
Generic
Dosage Form
CAPSULE, EXTENDED RELEASE
Route
ORAL
Effective Date
9/23/2026
Active Ingredients
ACETAZOLAMIDEApproval Type
Generic (ANDA)
FDA Application
ANDA040904FDA Approved
12/10/2008
TE Code
AB
On Market Since
2/15/2021
Pharmacological Classes
Price Statistics
The NADAC for ACETAZOLAMIDE ER 500 MG CAP has been published 287 times since Apr 7, 2021, and over the history we have for it it has declined 35.7%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.2882 per EA |
|---|---|
| All-time high | $0.4741 (Jul 14, 2021) |
| All-time low | $0.2206 (Nov 20, 2024) |
| 52-week high | $0.3055 |
| 52-week low | $0.2653 |
| Median price | $0.3366 |
| Average price | $0.3406 |
| Largest weekly change | -23.3% (Nov 20, 2024) |
| Weeks tracked | 287 |
| Tracking since | Apr 7, 2021 |
Generic Alternatives
The matcher finds 4 manufacturers offering a NADAC-published product with this drug's active ingredient and strength in a comparable dosage form (cheapest from each manufacturer, up to 10 shown below). None of the shown alternatives sit below the current price. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
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Manufacturer
Heritage Pharmaceuticals Inc. manufacturer profile
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Drug market
Acetazolamide market comparison
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Therapeutic class
Carbonic Anhydrase Inhibitor class view
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Trend hub
Latest market trends
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Guide
Understanding NADAC pricing
Use the explainer when you need context on how CMS publishes NADAC and how to interpret the number on this page.
Frequently asked questions
What is the NADAC price of ACETAZOLAMIDE ER 500 MG CAP?
The current National Average Drug Acquisition Cost (NADAC) for ACETAZOLAMIDE ER 500 MG CAP, manufactured by Heritage Pharmaceuticals Inc., is $0.2882 per EA (NDC 23155078701), effective Sep 30, 2026.
How has the price of ACETAZOLAMIDE ER 500 MG CAP changed over time?
Over the history we have for it, the NADAC for ACETAZOLAMIDE ER 500 MG CAP has declined 35.7%. It has been tracked across 287 weekly CMS publications since Apr 7, 2021.
What are the highest and lowest recorded NADAC prices for ACETAZOLAMIDE ER 500 MG CAP?
Since Apr 7, 2021, the NADAC for ACETAZOLAMIDE ER 500 MG CAP has ranged from a low of $0.2206 (Nov 20, 2024) to a high of $0.4741 (Jul 14, 2021), with a median of $0.3366 per EA.
Are there cheaper alternatives to ACETAZOLAMIDE ER 500 MG CAP?
4 manufacturers publish a NADAC-priced product with the same active ingredient and strength as ACETAZOLAMIDE ER 500 MG CAP in a comparable dosage form, but none are currently priced below it.
Who manufactures ACETAZOLAMIDE ER 500 MG CAP?
ACETAZOLAMIDE ER 500 MG CAP (NDC 23155078701) is labeled by Heritage Pharmaceuticals Inc., and CMS classifies it as a generic product.