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Ciprofloxacin microprecipitates and macroprecipitates in the human corneal epithelium

R A Eiferman1, J P Snyder, R E Nordquist

  • 1Research Service, Veterans Administration Medical Center, Louisville, Kentucky, USA. reiferman@cs.com

Journal of Cataract and Refractive Surgery
|November 1, 2001
PubMed

Insights

Ciprofloxacin eye drops can form precipitates in the cornea after surgery. These precipitates, identified as pure ciprofloxacin, showed antibacterial activity in lab tests.

Area of Science:

  • Ophthalmology
  • Pharmacology
  • Materials Science

Background:

  • Corneal transplantation is a surgical procedure to restore vision.
  • Ciprofloxacin ophthalmic drops are commonly used to prevent infection.
  • Epithelial damage can occur during or after corneal surgery.

Observation:

  • Microprecipitates were observed in the corneas of 2 out of 4 patients receiving preoperative ciprofloxacin.
  • A large macroprecipitate formed in a corneal ulcer in another patient.
  • These precipitates were analyzed using electron microscopy and high-pressure liquid chromatography.

Findings:

  • The crystalline precipitates were identified as pure ciprofloxacin.
  • The macroprecipitate exhibited significant antibacterial activity in vitro, demonstrating a large zone of inhibition.
  • The precipitates were confirmed to be bioactive and bioavailable in laboratory settings.

Implications:

  • Ciprofloxacin precipitates may form in damaged corneal tissue.
  • The precipitates retain antibacterial properties, suggesting potential therapeutic roles.
  • Further research is needed to understand the clinical significance and management of these precipitates in ophthalmic surgery.

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