Treatment of tuberculosis; often part of multi-drug regimen.
Optic neuritis with decreased visual acuity, central scotomata and loss of green and red perception
Peripheral neuropathy and headache (~1%)
Rashes (rare), arthralgia (rare), hyperuricemia (rare)
Frequency not defined
Myocarditis, pericarditis
Confusion, disorientation, dizziness, hallucination, headache, malaise
Dermatitis, erythema multiforme
Hyperuricemia
Abdominal pain, anorexia, gastric distress, nausea, vomitting
Eosinophilia, leukopenia, lymphadenopathy, neutropenia, thrombocytopenia
Hepatitis, hepatotoxicity
Arthralgia
Nephritis
Pneumonitis
Aluminum salts (e.g. aluminum hydroxide).