The "on-off" effect.
D004296:Dopa Decarboxylase / Q000378:metabolism; D006801:Humans; D007980:Levodopa / Q000009:adverse effects*; D009069:Movement Disorders / Q000139:chemically induced* / Q000201:enzymology / Q000378:metabolism; D010300:Parkinson Disease / Q000188:drug therapy*; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
D007980:Levodopa; D014446:Tyrosine 3-Monooxygenase; D004296:Dopa Decarboxylase