Is tigecycline less effective when taken with antacids?

Does combining tigecycline with antacids affect its effectiveness?

Tigecycline reaches the bloodstream through intravenous delivery, so antacids taken by mouth do not affect its blood levels or effectiveness. Oral antacids change stomach pH and interfere with oral antibiotics such as tetracyclines, but tigecycline bypasses the gastrointestinal tract.

What happens when tigecycline interacts with other drugs?

Tigecycline has limited drug-drug interactions. Most reported cases involve drugs that are metabolized by CYP enzymes, but antacids do not share that pathway. Studies show no significant change in tigecycline’s pharmacokinetics when combined with antacids.

When does tigecycline patent expire?

Tigecycline’s compound patent expired in 2014. The formulation patent held by Pfizer for Tygacil expired in 2020. Generic versions entered the U.S. market in 2021.