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.
Alka-Seltzer Heartburn Relief Extra Strength
Anhydrous citric acid, Sodium bicarbonate (heat-treated) · SODIUM BICARBONATE 1976 mg/1; CITRIC ACID MONOHYDRATE 1000 mg/1 · Tablet, Effervescent · Oral · Bayer Healthcare LLC
NDC 00280-0079-01 · 12 PACKET in 1 CARTON / 2 TABLET, EFFERVESCENT in 1 PACKET · 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
- M001
- 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 Anhydrous citric acid, Sodium bicarbonate (heat-treated) (Tablet, Effervescent)
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Bayer Healthcare LLC | SODIUM BICARBONATE 1650 mg/1; CITRIC ACID MONOHYDRATE 1000 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Bayer Healthcare LLC | SODIUM BICARBONATE 1976 mg/1; CITRIC ACID MONOHYDRATE 1000 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Bayer HealthCare LLC. | CITRIC ACID MONOHYDRATE 1000 mg/1; SODIUM BICARBONATE 1940 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Bayer Healthcare LLC | SODIUM BICARBONATE 1000 mg/1; CITRIC ACID MONOHYDRATE 1650 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Bayer Healthcare LLC | SODIUM BICARBONATE 1000 mg/1; CITRIC ACID MONOHYDRATE 1976 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Bayer Healthcare LLC | CITRIC ACID MONOHYDRATE 1000 mg/1; SODIUM BICARBONATE 1650 mg/1 | Jul 15, 2026 | Jul 15, 2026 |
| Bayer Healthcare LLC | CITRIC ACID MONOHYDRATE 1000 mg/1; SODIUM BICARBONATE 1976 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, "Alka-Seltzer Heartburn Relief Extra Strength — NDC 00280-0079-01," retrieved September 3, 2026, https://drugdashboards.com/drug/00280007901.
Free to cite with attribution — see how the data is put together.