The short version
16 companies supply this market — deep enough that no single failure threatens the supply.
Market view
24 marketed package NDCs · 16 active manufacturers
Most dispensed: 50 mg/50mL · Injection · #1 vial/carton / 50 ml in 1 vial · 250 mg/2.5mL · Injection · #1 vial/carton / 2.5 ml in 1 vial
16 companies supply this market — deep enough that no single failure threatens the supply.
Other molecules FDA puts in Anti-coagulant, 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.