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 And Simethicone · DIMETHICONE 80 mg/1; CALCIUM CARBONATE 750 mg/1 · Tablet, Chewable · Oral · Bayer HealthCare LLC.
NDC 00280-0225-01 · 110 TABLET, CHEWABLE in 1 BOTTLE, PLASTIC · OTC MONOGRAPH DRUG · View full market →
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.
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 →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.
There's no legal definition — it meets 1 of 6 public criteria. Why that matters →
No FDA shortage reports for this drug or its presentations.
No enforcement reports list this package NDC.
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Bayer HealthCare LLC. | DIMETHICONE 80 mg/1; CALCIUM CARBONATE 750 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Haleon US Holdings LLC | CALCIUM CARBONATE 750 mg/1; DIMETHICONE, UNSPECIFIED 80 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Bayer HealthCare LLC. | DIMETHICONE 750 mg/1; CALCIUM CARBONATE 80 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Bayer HealthCare LLC. | CALCIUM CARBONATE 750 mg/1; DIMETHICONE 80 mg/1 | Jul 15, 2026 | Jul 15, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "Alka-Seltzer Heartburn Plus Gas ReliefChews Tropical Punch — NDC 00280-0225-01," retrieved September 3, 2026, https://drugdashboards.com/drug/00280022501.
Free to cite with attribution — see how the data is put together.