The short version
Just 2 companies supply this market — thin enough that a single exit would be felt immediately. The price has jumped 540% in a year, to $3.20 per unit — sharp rises like this often mean supply is already tightening. 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 0.9% of the time — roughly 6× the typical drug (0.1%).
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