The short version
7 companies supply this market — a reasonable cushion if one runs into trouble. The generic price has fallen 34% in a year, to $47.69 per mL — and generics that get this cheap tend to get abandoned rather than defended. The brand runs $87.14 per mL — 1.8× more. Historically, drugs in this position went on to a new shortage within 90 days about 0.3% of the time — roughly 2× the typical drug (0.1%).