How often does tigecycline cause severe diarrhea?
Clinical safety data for tigecycline report that severe diarrhea is uncommon, with rates in the low single-digit percentages. In multiple prescribing-information safety summaries, diarrhea is generally reported more often than severe cases, and severe diarrhea is listed as an adverse reaction with an incidence around 1–2% depending on the indication and study population.[1][2]
Is “severe diarrhea” the same as “C. difficile”?
Not necessarily. Tigecycline can cause diarrhea as an adverse effect, and severe cases can occur. Separately, antibiotics—including tigecycline—can be associated with Clostridioides difficile (C. difficile) infection, which can present with severe diarrhea. Package-insert warnings typically address both severe diarrhea and C. difficile–associated diarrhea/colitis as distinct concepts.[1][2]
What increases the risk of severe diarrhea during tigecycline?
Risk tends to be higher in people with factors that predispose to antibiotic-associated diarrhea, such as recent or concurrent antibiotic exposure, older age, hospitalization, and underlying gastrointestinal conditions. In practice, clinicians also monitor more closely when diarrhea is prolonged, worsening, or accompanied by fever or abdominal pain, because that pattern can fit C. difficile or other severe enterocolitis.
Where can I find the exact number for my patient’s indication?
The frequency can differ slightly across trials and indications because the denominator and baseline risk change. The most reliable source for the exact percentage used in your setting is the tigecycline prescribing information for the specific country and formulation, which lists adverse-reaction frequencies by severity category.[1][2]
Sources
- https://www.accessdata.fda.gov/drugsatfda_docs/label/
- https://www.ema.europa.eu/en/medicines/ (tigecycline product information/EPAR)