The short version
31 companies supply this market — deep enough that no single failure threatens the supply.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Guaifenesin · GUAIFENESIN 1200 mg/1 · Tablet, Extended Release · Oral · Demoulas Super Markets, Inc
NDC 53942-0204-02 · 1 BLISTER PACK in 1 CARTON / 14 TABLET, EXTENDED RELEASE in 1 BLISTER PACK · ANDA · View full market →
31 companies supply this market — deep enough that no single failure threatens the supply.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
No Medicare Part D plan in CMS's quarterly files lists this product. That usually means it is discontinued, a repackager's listing, or a product no plan has added to its formulary.
How Part D pricing works →No NADAC pricing on file for this NDC — NADAC covers drugs dispensed by retail community pharmacies.
Not scored — fragility is computed for NADAC-priced NDCs.
sole-source market
For scale: the typical drug’s chance is about 0.1% — this one is in ordinary territory.
Backtested statistical model over the whole market, not this package alone. Model details →
No FDA shortage reports for this drug or its presentations.
No enforcement reports list this package NDC.
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| A-S Medication Solutions | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Amneal Pharmaceuticals Co. (I) Pvt. Ltd. | GUAIFENESIN 1 kg/kg | Jul 15, 2026 | Sep 3, 2026 |
| Aurohealth LLC | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Family Dollar (FAMILY WELLNESS) | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Granules India Ltd | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Major Pharmaceuticals | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Proficient Rx LP | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Rugby Laboratories | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Sam's West Inc | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Strategic Sourcing Services LLC | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| A-S Medication Solutions | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| AAA Pharmaceutical, Inc. | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Advanced Rx LLC | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Advanced Rx LLC | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| American Health Packaging | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Amerifoods Trading Company | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Amerisource Bergen | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Amneal Pharmaceuticals LLC | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Amneal Pharmaceuticals LLC | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Aphena Pharma Solutions - Tennessee, LLC | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Atlantic Biologicas Corp. | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Aurobindo Pharma Limited | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Aurobindo Pharma Limited | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Better Living Brands LLC | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Better Living Brands, LLC | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Bi-Mart | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| BJWC (Berkley & Jensen / BJ's) | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| BluePoint Laboratories | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Chain Drug Marketing Association Inc | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Chain Drug Marketing Association Inc | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Chain Drug Marketing Association, Inc. | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Chain Drug Marketing Association, Inc. | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Cvs | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| CVS Pharmacy | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| CVS Pharmacy | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Cvs Pharmacy, Inc | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Demoulas Super Markets, Inc | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Demoulas Super Markets, Inc | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Discount Drug Mart, Inc | GUAIFENESIN 1200 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Discount Drug Mart, Inc | GUAIFENESIN 600 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "Mucus Relief Maximum Strength — NDC 53942-0204-02," retrieved September 3, 2026, https://drugdashboards.com/drug/53942020402.
Free to cite with attribution — see how the data is put together.