The short version
16 companies supply this market — deep enough that no single failure threatens the supply. The generic price is up 24% over the past year, to $0.1173 per unit. The brand runs $7.20 per unit — 61× 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%).