The short version
Just 3 companies supply this market — thin enough that a single exit would be felt immediately. One of its named manufacturing plants, Aurobindo Pharma Limited, failed FDA inspectionwithin the last two years — the agency’s most serious outcome. 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%).
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