FDA Section 4 \u2022 who must NOT take this
Ethambutol - Contraindications
These conditions, allergies, and situations mean Ethambutol should NOT be used. From the US FDA-approved drug label Section 4.
CONTRAINDICATIONS Ethambutol hydrochloride is contraindicated in patients who are known to be hypersensitive to this drug.
It is also contraindicated in patients with known optic neuritis unless clinical judgment determines that it may be used.
Ethambutol hydrochloride is contraindicated in patients who are unable to appreciate and report visual side effects or changes in vision (e.g., young children, unconscious patients).