The short version
22 companies supply this market — deep enough that no single failure threatens the supply. The generic price is up 21% over the past year, to $6.33 per mL. A shortage here was resolved within the past year — markets usually stay tight for a while after. Historically, drugs in this position went on to a new shortage within 90 days about 0.5% of the time — roughly 4× the typical drug (0.1%).