Ethambutol
Ethambutol is an antibiotic used with other medicines to treat Tuberculosis. It should not be used alone for active tuberculosis because combination treatment is needed to reduce treatment failure and resistance.
Key points
- Ethambutol is one component of a regimen selected using the infection site, test results, resistance pattern and patient factors.
- Visual acuity and red-green colour perception may need assessment before and during treatment.
- New blurred vision, altered colour vision, eye pain or a blind spot requires immediate clinical review.
Listings are for comparison and general information, not a tuberculosis regimen; suitability and supply depend on a tuberculosis clinician, pharmacy checks, kidney and vision assessment and prescription requirements.
How ethambutol works
Ethambutol inhibits enzymes involved in building the mycobacterial cell wall. It slows susceptible tuberculosis bacteria while companion medicines attack the infection through other pathways.
Important safety checks
Baseline vision, ability to report visual changes, kidney function and other medicines should be reviewed. Reduced kidney clearance can increase exposure. Follow the complete tuberculosis plan and contact the treating service before any interruption; missed or incomplete treatment can harm the patient and complicate infection control.
When to seek urgent care
Stop and obtain immediate advice from the tuberculosis team for new visual blurring, loss of colour discrimination, blind spots or reduced vision. Seek urgent care for jaundice, severe rash, facial swelling, breathing difficulty, confusion or rapidly worsening tuberculosis symptoms.