The short version
Only one company currently supplies this market — there is no backup if it stumbles.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Acetaminophen and Diphenhydramine citrate · ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE CITRATE 38 mg/1 · Tablet · Oral · InvaTech Pharma Solutions LLC
NDC 57631-0010-00 · 30000 TABLET in 1 BOX · OTC MONOGRAPH DRUG · View full market →
Only one company currently supplies this market — there is no backup if it stumbles.
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 |
|---|---|---|---|
| InvaTech Pharma Solutions LLC | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE CITRATE 38 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "Acetaminophen and Diphenhydramine citrate — NDC 57631-0010-00," retrieved September 3, 2026, https://drugdashboards.com/drug/57631001000.
Free to cite with attribution — see how the data is put together.