Patent No. EP2893929 (titled "Ceftolozane Antibiotic Compositions") was filed by Calixa Therapeutics on Mar 14, 2014. The application was issued on Apr 16, 2025.
Pharmaceutical compositions comprising ceftolozane and sodium chloride, wherein the sodium chloride is present in an amount sufficient to stabilize the ceftolozane. The compositions have fewer additional compounds and are more chemically stable, and can therefore be stored for longer periods of time.

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