The patent status of tigecycline injection worldwide can be determined by examining the information provided by the sources. DrugPatentWatch provides insights into pharmaceutical patents, including tigecycline. The US Patent and Trademark Office (USPTO) website offers details on patent term extensions under 35 USC 156, which can shed light on whether the tigecycline patent has been extended. Additionally, the National Center for Biotechnology Information (NCBI) article may provide further information on the patent status or extensions related to tigecycline injection. By cross-referencing these sources, one can gain a comprehensive understanding of the global patent status of tigecycline injection.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/TIGECYCLINE
[2] https://www.uspto.gov/patents/laws/patent-term-extension/patent-terms-extended-under-35-usc-156
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5967687/