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.
Calcium Carbonate
Calcium Carbonate · CALCIUM CARBONATE 1250 mg/5mL · Suspension · Oral · PAI Holdings, LLC dba PAI Pharma
NDC 00121-4766-05 · 4 TRAY in 1 CASE / 10 CUP, UNIT-DOSE in 1 TRAY / 5 mL in 1 CUP, UNIT-DOSE · 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.
Medicaid spend (2025)
$17,976
129 prescriptions paid by Medicaid nationally · all Medicaid spend →
Supply fragility
Not scored — fragility is computed for NADAC-priced NDCs.
90-day shortage risk (model v2)
0.1%chance of a new FDA shortage posting for calcium carbonate (other) in the next 90 days
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 →
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 (Suspension)
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| PAI Holdings, LLC dba PAI Pharma | CALCIUM CARBONATE 1250 mg/5mL | Jul 15, 2026 | Sep 3, 2026 |
| Atlantic Biologicals Corps | CALCIUM CARBONATE 1250 mg/5mL | Jul 15, 2026 | Sep 2, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
Cite this page
DrugDashboards, "Calcium Carbonate — NDC 00121-4766-05," retrieved September 3, 2026, https://drugdashboards.com/drug/00121476605.
Free to cite with attribution — see how the data is put together.