The short version
15 companies supply this market — deep enough that no single failure threatens the supply.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Acetaminophen, Diphenhydramine HCl · ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 · Tablet, Film Coated · Oral · American Sales Company
NDC 41520-0514-71 · 1 BOTTLE in 1 CARTON / 50 TABLET, FILM COATED in 1 BOTTLE · OTC MONOGRAPH DRUG · View full market →
15 companies supply this market — deep enough that no single failure threatens the supply.
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.
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 →
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 |
|---|---|---|---|
| L.N.K. International, Inc. | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Amazon.com Services LLC | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| American Sales Company | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Army And Air Force Exchange Service | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Bryant Ranch Prepack | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| CVS Pharmacy, Inc. | DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1; ACETAMINOPHEN 500 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| Cvs Woonsocket Prescription Center, Incorporated | ACETAMINOPHEN 325 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Dolgencorp Inc | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Aug 26, 2026 | Sep 2, 2026 |
| HyVee Inc | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Aug 5, 2026 | Sep 2, 2026 |
| L. Perrigo Company | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Publix Super Markets Inc | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Salado Sales, Inc. | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Walgreen Company | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Walmart Inc. | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Walmart Inc. | ACETAMINOPHEN 325 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| CVS Pharmacy, Inc. | DIPHENHYDRAMINE HYDROCHLORIDE 500 mg/1; ACETAMINOPHEN 25 mg/1 | Jul 22, 2026 | Aug 19, 2026 |
| Dolgencorp, LLC | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Aug 19, 2026 |
| CVS Pharmacy, Inc. | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Jul 15, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "CareOne Acetaminophen PM — NDC 41520-0514-71," retrieved September 3, 2026, https://drugdashboards.com/drug/41520051471.
Free to cite with attribution — see how the data is put together.