The short version
Just 3 companies supply this market — thin enough that a single exit would be felt immediately. The price has fallen 34% in a year, to $62.35 per mL — and generics that get this cheap tend to get abandoned rather than defended. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want. Historically, drugs in this position went on to a new shortage within 90 days about 0.4% of the time — roughly 3× the typical drug (0.1%).
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