The short version
Just 2 companies supply this market — thin enough that a single exit would be felt immediately.
Market view
4 marketed package NDCs · 2 active manufacturers
Most dispensed: 200 mg · Capsule, Extended Release · #100 capsule, extended releases/bottle · 100 mg · Capsule, Extended Release · #100 capsule, extended releases/bottle · 400 mg · Capsule, Extended Release · #100 capsule, extended releases/bottle · 300 mg · Capsule, Extended Release · #100 capsule, extended releases/bottle
Just 2 companies supply this market — thin enough that a single exit would be felt immediately.
Every detected change for theophylline anhydrous, 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 Methylxanthine, 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.