[Clinical safety of azithromycin]
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Updated: Sep 27, 2026

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Published on: November 16, 2016
1First Department of Internal Medicine, Faculty of Medicine, University of Ryukyus, Okinawa 903-0215, Japan.
Abstract:
The safety of azithromycin has been assessed in the clinical trial in Japan. Among the patients treated with azithromycin, side effects were recorded in 82(4.35%) of 1,886 adults and in 22(3.03%) of 726 children. The most common side effects in both groups were diarrhea, abdominal pain, and other gastrointestinal symptoms. All side effects were classed as mild or moderate. Laboratory abnormalities were recorded in 125(7.75%) of 1,279 adults and 85(19.23%) of 442 children, which included eosinophilia, neutropenia, and increases of GOT and GPT, and so on. All laboratory abnormalities were not severe and transient. Overall, azithromycin was well tolerated and can be safely used to treat bacterial infections in patients of all ages.
Insights
Azithromycin demonstrated a favorable safety profile in Japanese clinical trials. Most side effects were mild gastrointestinal issues, indicating azithromycin is safe for treating bacterial infections across all age groups.
Area of Science:
- Pharmacology
- Clinical Trials
- Infectious Disease
Context:
- Azithromycin is a widely used antibiotic for bacterial infections.
- Assessing antibiotic safety is crucial for patient care and treatment guidelines.
- Japanese clinical trials provide region-specific safety data.
Purpose:
- To evaluate the safety and tolerability of azithromycin in a Japanese patient population.
- To document the incidence and nature of adverse events associated with azithromycin use.
- To assess laboratory abnormalities in patients receiving azithromycin.
Summary:
- A clinical trial in Japan assessed azithromycin safety in 1,886 adults and 726 children.
- Reported side effects included mild to moderate gastrointestinal symptoms like diarrhea.
- Transient, non-severe laboratory abnormalities such as eosinophilia and elevated liver enzymes were observed.
Impact:
- Azithromycin was well-tolerated in the studied Japanese population.
- The findings support the safe use of azithromycin for bacterial infections in all age groups.
- This data contributes to the global understanding of azithromycin's safety profile.
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