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Study on rectal administration of azithromycin by suppository for pediatric use
Rectal azithromycin (AZM) suppositories offer an alternative for children with mycoplasma pneumonia who experience vomiting from oral AZM. The suppository showed 20.3% bioavailability compared to oral administration, suggesting potential for improved tolerability.
Area of Science:
- Pharmacology
- Pharmaceutical Sciences
- Pediatric Medicine
Background:
- Azithromycin (AZM) is a first-line treatment for pediatric mycoplasma pneumonia.
- Oral AZM administration frequently causes vomiting in children.
- Rectal drug administration bypasses first-pass metabolism in the liver.
Purpose of the Study:
- To develop an azithromycin (AZM) suppository.
- To evaluate the pharmaceutical properties of the AZM suppository.
- To investigate the pharmacokinetics of rectal AZM administration in humans.
Main Methods:
- Five healthy volunteers participated in a randomized study.
- Subjects received either oral AZM tablets or rectal AZM suppositories (125mg, 250mg, 500mg).
- Serum AZM concentrations were measured using HPLC with electrochemical detection at various time points post-administration.
Main Results:
- The bioavailability of the azithromycin (AZM) suppository via rectal administration was 20.3% relative to oral dosing.
- Serum concentrations of AZM were determined through high-performance liquid chromatography (HPLC).
Conclusions:
- Rectal AZM suppositories may serve as an effective alternative when oral administration is not tolerated.
- Further research is needed to optimize rectal absorption and confirm safety in pediatric populations.
- The surface area available for absorption in the rectum may influence AZM bioavailability.
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