Tigecycline, marketed under the brand name Tygacil, is a broad-spectrum antibiotic used to treat various bacterial infections. Adverse reactions associated with tigecycline use include nausea, vomiting, diarrhea, abdominal pain, and headache. Less common side effects may include allergic reactions like rash, itching, swelling, severe dizziness, and trouble breathing. It is essential to seek medical attention if any severe allergic reactions occur while using tigecycline. Patients should inform their healthcare provider of any allergies they have before starting treatment with tigecycline to prevent adverse reactions [2][3].

Sources:
- [2]: https://www.pfizermedicalinformation.com/tygacil/adverse-reactions
- [3]: https://www.mayoclinic.org/drugs-supplements/tigecycline-intravenous-route/side-effects/drg-20072556?p=1