Isoniazid and levodopa.
D004347:Drug Interactions; D006801:Humans; D007538:Isoniazid / Q000009:adverse effects*; D007980:Levodopa / Q000009:adverse effects*; D008297:Male; D008995:Monoamine Oxidase / Q000172:deficiency
D007980:Levodopa; D008995:Monoamine Oxidase; D007538:Isoniazid