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Ivermectin detection in serum of onchocerciasis patients: relationship to adverse reactions

F L Njoo1, W M Beek, H J Keukens

  • 1Department of Ophthalmo-Immunology, The Netherlands Ophthalmic Research Institute, Amsterdam.

The American Journal of Tropical Medicine and Hygiene
|January 1, 1995
PubMed

Insights

Ivermectin adverse reactions in onchocerciasis patients are not fully understood. This study found no link between ivermectin levels in the blood and the severity of these reactions.

Area of Science:

  • Pharmacology
  • Tropical Medicine
  • Clinical Parasitology

Background:

  • Ivermectin is a key treatment for onchocerciasis.
  • Adverse reactions to ivermectin can occur, but their pathogenesis is unclear.
  • Previous research suggests a correlation between infection intensity and reaction severity.

Purpose of the Study:

  • To investigate if diminished ivermectin absorption explains why some severely infected onchocerciasis patients have fewer adverse reactions.
  • To analyze the relationship between ivermectin serum concentrations and the grade of adverse reactions.

Main Methods:

  • Serum ivermectin concentrations were measured using high-performance liquid chromatography.
  • 71 onchocerciasis patients with varying reaction severities were analyzed.
  • Ivermectin levels were assessed one and two days post-treatment.

Main Results:

  • The study measured ivermectin concentrations and half-life in treated patients.
  • No significant relationship was found between ivermectin serum concentrations and the grade of adverse reactions.
  • This suggests that absorption is not the primary factor influencing ivermectin's side effects in onchocerciasis.

Conclusions:

  • The pathogenesis of ivermectin-associated adverse reactions in onchocerciasis remains to be elucidated.
  • Diminished ivermectin absorption does not appear to explain the variability in adverse reaction severity.
  • Further research is needed to understand the mechanisms behind ivermectin's side effects.

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