When does tigecycline injection's extended patent expire?

Patents for tigecycline (and any “extended” term) are jurisdiction-specific and refer to different patent families (composition, use, process) plus any term extensions. There isn’t a single global expiration date you can quote.

If you tell me:
- the country/region you care about, and
- whether you mean the basic patent (composition or method), or a patent term extension/SPC,

I can give you a more precise answer and show you how to verify it (e.g., FDA Orange Book for the US, EPO/Google Patents for the EU).