The short version
Just 3 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.
Supreme Antacid
calcium carbonate, magnesium hydroxide · MAGNESIUM HYDROXIDE 270 mg/10mL; CALCIUM CARBONATE 800 mg/10mL · Liquid · Oral · H E B
NDC 37808-0614-05 · 355 mL in 1 BOTTLE · 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.
Is this a "specialty" drug?
There's no legal definition — it meets 1 of 6 public criteria. Why that matters →
- Part D specialty tier
- Costs ≥ $950/fill
- Biologic (BLA)
- Injectable / infused
- Orphan-drug exclusivity
- REMS program · Xywav and Xyrem
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 calcium carbonate, magnesium hydroxide (Liquid)
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Discount Drug Mart, Inc | MAGNESIUM HYDROXIDE 135 mg/5mL; CALCIUM CARBONATE 400 mg/5mL | Aug 26, 2026 | Sep 3, 2026 |
| Cvs | MAGNESIUM HYDROXIDE 135 mg/5mL; CALCIUM CARBONATE 400 mg/5mL | Aug 26, 2026 | Sep 2, 2026 |
| H E B | MAGNESIUM HYDROXIDE 270 mg/10mL; CALCIUM CARBONATE 800 mg/10mL | Aug 26, 2026 | Sep 2, 2026 |
| Discount Drug Mart, Inc | MAGNESIUM HYDROXIDE 400 mg/5mL; CALCIUM CARBONATE 135 mg/5mL | Jul 22, 2026 | Aug 22, 2026 |
| Cvs | MAGNESIUM HYDROXIDE 400 mg/5mL; CALCIUM CARBONATE 135 mg/5mL | Jul 22, 2026 | Aug 19, 2026 |
| H E B | MAGNESIUM HYDROXIDE 800 mg/10mL; CALCIUM CARBONATE 270 mg/10mL | Jul 22, 2026 | Aug 19, 2026 |
| Discount Drug Mart, Inc | CALCIUM CARBONATE 400 mg/5mL; MAGNESIUM HYDROXIDE 135 mg/5mL | Jul 15, 2026 | Jul 16, 2026 |
| Cvs | CALCIUM CARBONATE 400 mg/5mL; MAGNESIUM HYDROXIDE 135 mg/5mL | Jul 15, 2026 | Jul 15, 2026 |
| H E B | CALCIUM CARBONATE 800 mg/10mL; MAGNESIUM HYDROXIDE 270 mg/10mL | Jul 15, 2026 | Jul 15, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
Cite this page
DrugDashboards, "Supreme Antacid — NDC 37808-0614-05," retrieved September 3, 2026, https://drugdashboards.com/drug/37808061405.
Free to cite with attribution — see how the data is put together.