The short version
Just 3 companies supply this market — thin enough that a single exit would be felt immediately.
Market view
9 marketed package NDCs · 3 active manufacturers
Most dispensed: 100 mg · Capsule, Gelatin Coated · #1 bottle/carton / 5 capsule, gelatin coated in 1 bottle · 10 mg · Capsule, Gelatin Coated · #1 bottle/carton / 5 capsule, gelatin coated in 1 bottle · 40 mg · Capsule, Gelatin Coated · #1 bottle/carton / 5 capsule, gelatin coated in 1 bottle
Just 3 companies supply this market — thin enough that a single exit would be felt immediately.
Other molecules FDA puts in Alkylating Drug, 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.