The short version
Just 3 companies supply this market — thin enough that a single exit would be felt immediately.
Market view
13 marketed package NDCs · 3 active manufacturers
Most dispensed: DIPHENHYDRAMINE HYDROCHLORIDE 25 mg · Tablet · #1000 tablets/bottle · DIPHENHYDRAMINE HYDROCHLORIDE 25 mg · Tablet · #600 tablets/bottle
Just 3 companies supply this market — thin enough that a single exit would be felt immediately.
Every detected change for diphenhydramine hcl 25 mg, newest first — price moves, shortages, recalls, and manufacturers entering or leaving. Detected by comparing each day’s federal data against the day before.
Other molecules FDA puts in Histamine-1 Receptor Antagonist, with whether each is in shortage right now. Same class is not the same drug — substitution is a clinical decision, and this is a supply picture, not a recommendation.
Expand a strength to see its dosage forms, then package sizes, then each manufacturer and NDC. Click an NDC for its full detail page.