Ethambutol is often used along with isoniazid in the treatment of tuberculosis.
Ethambutol may interfere with the absorption of copper and zinc by binding to them.
In order to avoid deficiency, you may wish to take supplements of these essential minerals. Make sure to separate your ethambutol dose and your mineral supplements by at least 2 hours.
Solecki TJ, et al. Effect of a chelating drug on balance and tissue distribution of four essential metals.
31(3–4): 207–216, 1984.