The short version
11 companies supply this market — deep enough that no single failure threatens the supply.
Market view
26 marketed package NDCs · 11 active manufacturers
Most dispensed: DISODIUM HEMIPENTAHYDRATE 500 mg/20mL · Injection, Powder, Lyophilized, For Solution · #1 vial/carton / 20 ml in 1 vial · DISODIUM HEMIPENTAHYDRATE 100 mg/4mL · Injection, Powder, Lyophilized, For Solution · #1 vial/carton / 4 ml in 1 vial
11 companies supply this market — deep enough that no single failure threatens the supply.
Other molecules FDA puts in Folate Analog Metabolic Inhibitor, 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.