Cubist Pharmaceuticals has 5 drugs losing patent protection between 2026 and 2031 in this data. The nearest is Dificid (fidaxomicin) on January 31, 2028; the company listed 10 patents on it with the FDA, and that is the last one to expire.
This is the earliest date a generic could enter; it is not a guarantee one will. We calculate it as the later of the last patent the company listed with the FDA and the last regulatory exclusivity. Companies often reach settlement agreements with generic makers for a different date, and those agreements are not public in this data.
Dificid (fidaxomicin)Cubist Pharmaceuticals · 10 patents · January 31, 2028
Entereg (alvimopan)Cubist Pharmaceuticals · 1 patent · February 12, 2030
Cubicin (daptomycin)Cubist Pharmaceuticals · 2 patents · November 23, 2030
Dates from the FDA Orange Book, the official record of which patents cover
which approved drug; updated monthly. Facts only, not investment advice. Verify against the
Orange Book and primary filings. pdufa.bio is not affiliated with the FDA.
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