The short version
Just 2 companies supply this market — thin enough that a single exit would be felt immediately.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Pharbinex-Dm
GUAIFENESIN 400mg and DEXTROMETHORPHAN HBR 20MG · GUAIFENESIN 400 mg/1; DEXTROMETHORPHAN HYDROBROMIDE 20 mg/1 · Tablet · Oral · Pharbest Pharmaceuticals, Inc.
NDC 16103-0381-04 · 1 BOTTLE, PLASTIC in 1 CARTON / 30 TABLET in 1 BOTTLE, PLASTIC · OTC MONOGRAPH DRUG · View full market →
Medicare Part D
Medicare Part D does not cover over-the-counter drugs — by law it pays only for products requiring a prescription.
How Part D pricing works →NADAC price per unit
No NADAC pricing on file for this NDC — NADAC covers drugs dispensed by retail community pharmacies.
Supply fragility
Not scored — fragility is computed for NADAC-priced NDCs.
Regulatory
- Application
- M012
- TE code
- —
- Approval date
- —
- Patents / exclusivity
- None on file
Shortage history
No FDA shortage reports for this drug or its presentations.
Recalls (this NDC)
No enforcement reports list this package NDC.
Manufacturers of GUAIFENESIN 400mg and DEXTROMETHORPHAN HBR 20MG (Tablet)
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Pharbest Pharmaceuticals, Inc. | GUAIFENESIN 400 mg/1; DEXTROMETHORPHAN HYDROBROMIDE 20 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Ulai Health LLC | GUAIFENESIN 400 mg/1; DEXTROMETHORPHAN HYDROBROMIDE 20 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Pharbest Pharmaceuticals, Inc. | GUAIFENESIN 20 mg/1; DEXTROMETHORPHAN HYDROBROMIDE 400 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Ulai Health LLC | GUAIFENESIN 20 mg/1; DEXTROMETHORPHAN HYDROBROMIDE 400 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Pharbest Pharmaceuticals, Inc. | DEXTROMETHORPHAN HYDROBROMIDE 20 mg/1; GUAIFENESIN 400 mg/1 | Jul 15, 2026 | Jul 15, 2026 |
| Ulai Health LLC | DEXTROMETHORPHAN HYDROBROMIDE 20 mg/1; GUAIFENESIN 400 mg/1 | Jul 15, 2026 | Jul 15, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
Cite this page
DrugDashboards, "Pharbinex-Dm — NDC 16103-0381-04," retrieved September 3, 2026, https://drugdashboards.com/drug/16103038104.
Free to cite with attribution — see how the data is put together.