title: Minocycline levels in tears of patients with active trachoma.
abstract: We determined minocycline levels in human tears and plasma samples using high-performance liquid chromatography. In the first study, we determined the trough tear and plasma levels of minocycline in patients with active trachoma 24 hours after an oral dose. After a single dose of minocycline, the mean concentration of the drug in tear samples was 189 +/- 58 ng/mL and corresponding plasma levels were 578 +/- 290 ng/mL. In a second study, we monitored the pharmacokinetics of the drug in tear and plasma samples of healthy nonfasting adults. Tear and plasma samples were collected at 1 through 6, 12, 24, 48, 72, and 96 hours. The pharmacokinetics study revealed that 48 hours following a single 200-mg dose of minocycline, the mean tear level of minocycline was 68 ng/mL, which is above the in vitro minimal inhibitory concentration required for Chlamydia trachomatis and other susceptible organisms.
authors.affiliation: Research Department, King Khaled Eye Specialist Hospital, Riyada, Saudi Arabia.
authors.forename: K F
authors.initials: KF
authors.lastname: Tabbara
authors.forename: H
authors.initials: H
authors.lastname: Cooper
mesh_terms: D000293:Adolescent; D001682:Biological Availability; D002648:Child; D006801:Humans; D008297:Male; D008911:Minocycline / Q000032:analysis* / Q000097:blood / Q000378:metabolism / Q000627:therapeutic use; D013754:Tetracyclines / Q000032:analysis*; D014141:Trachoma / Q000097:blood / Q000188:drug therapy / Q000378:metabolism*
chemical_list: D013754:Tetracyclines; D008911:Minocycline