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Optic neuropathy in ethambutol-treated renal tuberculosis.

Abstract
Ethambutol is frequently used in the treatment of tuberculosis, and, although optic neuropathies have been reported with the use of ethambutol, this adverse side effect has been considered to be rare and generally reversible with discontinuation of the medication. However, we recently saw two patients with renal tuberculosis treated with ethambutol in whom visual loss from toxic optic neuropathies was severe and irreversible despite careful ophthalmological monitoring and prompt discontinuation of the agent at the first sign of impaired visual function. While ethambutol treatment is most commonly instituted for pulmonary tuberculosis, it is interesting to note that both of these patients had renal tuberculosis. Since ethambutol is actively excreted via the renal system, compromise of renal function such as due to renal tuberculosis may lead to serum concentration elevations of ethambutol sufficient to produce optic neuropathy.
AuthorsE G DeVita, M Miao, A A Sadun
JournalJournal of clinical neuro-ophthalmology (J Clin Neuroophthalmol) Vol. 7 Issue 2 Pg. 77-86 (Jun 1987) ISSN: 0272-846X [Print] United States
PMID2956288 (Publication Type: Case Reports, Journal Article)
Chemical References
  • Ethambutol
Topics
  • Adult
  • Aged
  • Ethambutol (adverse effects, therapeutic use)
  • Female
  • Fluorescein Angiography
  • Humans
  • Male
  • Middle Aged
  • Optic Neuritis (chemically induced)
  • Tuberculosis, Renal (drug therapy)
  • Visual Acuity (drug effects)
  • Visual Fields (drug effects)

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