Product Information
METFORMIN ER 1,000 MG GASTR-TB is a generic product labeled by Micro Labs Limited, priced at $0.3357 per EA under NDC 42571033490. Its NADAC has been published 160 times since Sep 13, 2023.
FDA first approved this application on Jan 10, 2023. Its Orange Book therapeutic-equivalence code is AB3 — FDA rates it therapeutically equivalent to (substitutable for) its reference product.
Strength
1000 mg/1
Manufacturer
Micro Labs LimitedNDC
42571033490
Classification
Generic
Dosage Form
TABLET, FILM COATED, EXTENDED RELEASE
Route
ORAL
Effective Date
9/23/2026
Active Ingredients
METFORMIN HYDROCHLORIDEApproval Type
Generic (ANDA)
FDA Application
ANDA212448FDA Approved
1/10/2023
TE Code
AB3
On Market Since
3/1/2023
Pharmacological Classes
Price Statistics
The NADAC for METFORMIN ER 1,000 MG GASTR-TB has been published 160 times since Sep 13, 2023, and over the history we have for it it has declined 85.0%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.3357 per EA |
|---|---|
| All-time high | $2.2349 (Nov 15, 2023) |
| All-time low | $0.3336 (Aug 19, 2026) |
| 52-week high | $0.5124 |
| 52-week low | $0.3336 |
| Median price | $0.5357 |
| Average price | $0.7749 |
| Largest weekly change | +76.1% (Feb 21, 2024) |
| Weeks tracked | 160 |
| Tracking since | Sep 13, 2023 |
Generic Alternatives
The matcher finds 15 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). Switching to the cheapest would cut per-unit acquisition cost by roughly 93% at current NADAC. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
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Manufacturer
Micro Labs Limited manufacturer profile
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Therapeutic class
Biguanide 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 METFORMIN ER 1,000 MG GASTR-TB?
The current National Average Drug Acquisition Cost (NADAC) for METFORMIN ER 1,000 MG GASTR-TB, manufactured by Micro Labs Limited, is $0.3357 per EA (NDC 42571033490), effective Sep 30, 2026.
How has the price of METFORMIN ER 1,000 MG GASTR-TB changed over time?
Over the history we have for it, the NADAC for METFORMIN ER 1,000 MG GASTR-TB has declined 85.0%. It has been tracked across 160 weekly CMS publications since Sep 13, 2023.
What are the highest and lowest recorded NADAC prices for METFORMIN ER 1,000 MG GASTR-TB?
Since Sep 13, 2023, the NADAC for METFORMIN ER 1,000 MG GASTR-TB has ranged from a low of $0.3336 (Aug 19, 2026) to a high of $2.2349 (Nov 15, 2023), with a median of $0.5357 per EA.
Are there cheaper alternatives to METFORMIN ER 1,000 MG GASTR-TB?
Yes. 15 manufacturers publish a NADAC-priced product with the same active ingredient and strength in a comparable dosage form. The lowest-priced option, METFORMIN HCL 1,000 MG TABLET, is $0.0231 per EA — about 93% below METFORMIN ER 1,000 MG GASTR-TB.
Who manufactures METFORMIN ER 1,000 MG GASTR-TB?
METFORMIN ER 1,000 MG GASTR-TB (NDC 42571033490) is labeled by Micro Labs Limited, and CMS classifies it as a generic product.