The short version
Only one company currently supplies this market — there is no backup if it stumbles.
Market view
6 marketed package NDCs · 1 active manufacturer
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
Only one company currently supplies this market — there is no backup if it stumbles.
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.