Acetaminophen Diphenhydramine HCl · ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 · Tablet, Coated · Oral · QUALITY CHOICE (Chain Drug Marketing Association)
NDC 83324-0166-50 · 1 BOTTLE, PLASTIC in 1 BOX / 50 TABLET, COATED 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 price has held steady around $0.0444 per unit over the past year. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want.
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 →Estimates: latest NADAC unit price × quantity. Pharmacy acquisition cost only — excludes dispensing fees, markup, and insurance terms.
Some pressure is visible, but not much — here’s everything the score found to count.
The score counts pressure that is already visible — fewer makers, shortages, recalls, falling prices. 0 means none of it; 100 means all of it at once. Recomputed daily · as of Sep 3, 2026
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 |
|---|---|---|---|
| P & L Development, LLC | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| QUALITY CHOICE (Chain Drug Marketing Association) | ACETAMINOPHEN 500 mg/1; DIPHENHYDRAMINE HYDROCHLORIDE 25 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "Pain Reliever PM — NDC 83324-0166-50," retrieved September 3, 2026, https://drugdashboards.com/drug/83324016650.
Free to cite with attribution — see how the data is put together.