This medication is an antibiotic, prescribed for skin and abdominal infections. It works by killing sensitive bacteria.If you have an allergy to tigecycline or any other part of this drug. Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs. If you have a tetracycline allergy, talk with your doctor. If you are pregnant or may be pregnant.