Product Information
METFORMIN ER 500 MG GASTRC-TB is a generic product labeled by Micro Labs Limited, priced at $0.2710 per EA under NDC 42571033301. 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
500 mg/1
Manufacturer
Micro Labs LimitedNDC
42571033301
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 500 MG GASTRC-TB has been published 160 times since Sep 13, 2023, and over the history we have for it it has declined 55.2%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.2710 per EA |
|---|---|
| All-time high | $0.6566 (May 15, 2024) |
| All-time low | $0.2619 (Aug 19, 2026) |
| 52-week high | $0.3965 |
| 52-week low | $0.2619 |
| Median price | $0.4043 |
| Average price | $0.4397 |
| Largest weekly change | +56.8% (Mar 20, 2024) |
| Weeks tracked | 160 |
| Tracking since | Sep 13, 2023 |
Generic Alternatives
The matcher finds 20 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 95% at current NADAC. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
Continue researching this drug
Use these direct paths to move from a single NDC into the surrounding market, manufacturer, class, and trend context.
Manufacturer
Micro Labs Limited manufacturer profile
See the full portfolio, pricing trend, and other products from this labeler.
Drug market
Metformin Hydrochloride market comparison
Compare this molecule across participating manufacturers and inspect the broader market price spread.
Therapeutic class
Biguanide class view
See how this drug behaves alongside other products in the same FDA pharmacologic class.
Trend hub
Latest market trends
Zoom back out to the weekly mover view and compare this NDC with the rest of the current NADAC release.
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 500 MG GASTRC-TB?
The current National Average Drug Acquisition Cost (NADAC) for METFORMIN ER 500 MG GASTRC-TB, manufactured by Micro Labs Limited, is $0.2710 per EA (NDC 42571033301), effective Sep 30, 2026.
How has the price of METFORMIN ER 500 MG GASTRC-TB changed over time?
Over the history we have for it, the NADAC for METFORMIN ER 500 MG GASTRC-TB has declined 55.2%. 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 500 MG GASTRC-TB?
Since Sep 13, 2023, the NADAC for METFORMIN ER 500 MG GASTRC-TB has ranged from a low of $0.2619 (Aug 19, 2026) to a high of $0.6566 (May 15, 2024), with a median of $0.4043 per EA.
Are there cheaper alternatives to METFORMIN ER 500 MG GASTRC-TB?
Yes. 20 manufacturers publish a NADAC-priced product with the same active ingredient and strength in a comparable dosage form. The lowest-priced option, METFORMIN HCL 500 MG TABLET, is $0.0145 per EA — about 95% below METFORMIN ER 500 MG GASTRC-TB.
Who manufactures METFORMIN ER 500 MG GASTRC-TB?
METFORMIN ER 500 MG GASTRC-TB (NDC 42571033301) is labeled by Micro Labs Limited, and CMS classifies it as a generic product.