Studies on the efficacy of generic tigecycline injections are limited. Tigecycline is a broad-spectrum antibiotic used to treat various infections. While generic versions of tigecycline have been developed, the specific efficacy and bioequivalence of these generics compared to the brand-name drug Tygacil have not been extensively studied or reported in the sources provided. It is important to consult healthcare professionals and regulatory agencies for the most up-to-date information on generic tigecycline efficacy and safety.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/TIGECYCLINE
[2] https://reference.medscape.com/drug/tygacil-tigecycline-342527
[3] https://go.drugbank.com/drugs/DB00560