... ethambutol and isoniazid versus rifampicin and ethambutol". Thorax. 56 (3): 167-172. doi:10.1136/thorax.56.3.167. PMC 1758783. ... The introduction of macrolides led to this use greatly decreasing. However, since rifampicin is broadly underdosed in M. avium ... Hypersensitivity reactions are also common and can present with a maculopapular rash and fever. Gynecomastia may occur. ... For active tuberculosis, it is often used together with rifampicin, pyrazinamide, and either streptomycin or ethambutol. For ...