Tigecycline

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Tigecycline is the only antibiotic in an antibiotic class called glycylcyclines, which are related to tetracyclines.
Tigecycline works by preventing bacteria from producing proteins they need to grow and multiply.
This drug is effective against many resistant bacteria, including those with resistance to tetracyclines. However, the risk of dying is higher with tigecycline than with other antibiotics. Thus, tigecycline is used only if no alternatives are available. Tigecycline is given intravenously.
(See also Overview of Antibiotics.)