The short version
Only one company currently supplies this market — there is no backup if it stumbles.
Market view
1 marketed package NDCs · 1 active manufacturer
Most dispensed: 50 mg/mL · Powder, For Solution · #50 packets/carton / 10 ml in 1 packet · 500 mg · Tablet, Film Coated · #100 tablet, film coateds/bottle · 500 mg · Tablet · #100 tablets/bottle · 1 kg/kg · Powder · #50 kg/drum
Only one company currently supplies this market — there is no backup if it stumbles.
Other molecules FDA puts in Anti-epileptic Agent, 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.