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Optic neuropathy in ethambutol-treated renal tuberculosis
Journal of Clinical Neuro-Ophthalmology
|June 1, 1987
Summary
Ethambutol can cause irreversible vision loss in patients with renal tuberculosis due to elevated drug levels. Prompt discontinuation may not prevent severe optic neuropathy in these cases.
Area of Science:
- Ophthalmology
- Nephrology
- Infectious Diseases
Background:
- Ethambutol is a key treatment for tuberculosis.
- Optic neuropathy is a known, though rare, side effect of ethambutol.
- This side effect is typically reversible upon medication cessation.
Observation:
- Two patients with renal tuberculosis developed severe, irreversible vision loss.
- These patients were treated with ethambutol.
- Vision loss occurred despite ophthalmological monitoring and early drug discontinuation.
Findings:
- Renal tuberculosis may impair ethambutol excretion.
- This impairment can lead to elevated serum ethambutol concentrations.
- Elevated levels may cause severe toxic optic neuropathy.
Implications:
- Standard ethambutol protocols may need adjustment for renal tuberculosis patients.
- Increased risk of irreversible optic neuropathy in renal impairment.
- Highlights the importance of monitoring visual function in patients with compromised renal function receiving ethambutol.