The short version
10 companies supply this market — deep enough that no single failure threatens the supply. The brand price has held steady around $9.99 per unit over the past year. Generic versions run $0.7645 per unit — 13× cheaper. 2 Class II recalls hit this product in the past year (Amgen, Inc.). Put together: worth watching — several of the pressures that precede supply trouble are present at once.
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