ethambutol PubChem:14052 CAS:74-55-5 ChEBI:4877 Ethambutol is an antimycobacterial drug prescribed to treat tuberculosis. It is usually given in combination with other tuberculosis drugs, such as isoniazid, rifampicin, and pyrazinamide. Ethambutol inhibits arabinosyl biosynthesis, disrupting mycobacterial cell wall formation. ChEMBL:CHEMBL44884 antibiotic_resistance ARO:3000497 polyamine antibiotic