Ethambutol is a common medicine used to treat tuberculosis. But it can sometimes damage the optic nerve, leading to vision loss. A new analysis looked at data from over 260,000 people to understand who is at risk. The goal was to protect patients from losing their sight while they fight this serious infection.
The study found that people with kidney issues or high blood pressure face a much higher chance of this side effect. Those with kidney problems had nearly four times the risk. People with high blood pressure had more than double the risk. These conditions make the eyes more vulnerable to the drug.
For those who develop vision problems, the outlook depends on age and timing. Younger patients had a better chance of recovering their sight. Stopping the medicine early also helped improve visual outcomes. The researchers noted that detecting early changes in the eye nerves was harder with some tests than others. This means doctors need to watch patients closely, especially those with high blood pressure or kidney disease.