Product Information
METFORMIN ER 1,000 MG GASTR-TB is a generic product labeled by Micro Labs Limited, priced at $0.3336 per EA under NDC 42571033490. Its NADAC has been published 154 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
8/19/2026
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 154 times since Sep 13, 2023, and over the history we have for it it has declined 85.1%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.3336 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 | $0.5428 |
| Average price | $0.7920 |
| Largest weekly change | +76.1% (Feb 21, 2024) |
| Weeks tracked | 154 |
| 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
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 $0.3336 per EA (NDC 42571033490), effective Aug 19, 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 85.1%. It has been tracked across 154 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 $0.5428 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.