Need for uncombined carbidopa to treat parkinsonism.
D002230:Carbidopa / Q000008:administration & dosage*; D004359:Drug Therapy, Combination; D006801:Humans; D006834:Hydrazines / Q000008:administration & dosage*; D007980:Levodopa / Q000008:administration & dosage; D010300:Parkinson Disease / Q000188:drug therapy*
D006834:Hydrazines; D007980:Levodopa; D002230:Carbidopa