_____ is the most effective agent for the management of Parkinson's disease

Fill in the blank(s) with correct word

Levodopa: Levodopa is the most effective agent for the management of Parkinson's disease and is most effective in relieving muscle rigidity and bradykinesia. Since dopamine cannot get through the blood-brain barrier and get into the brain, it must be given in the form of levodopa, which, once past the blood-brain barrier, converts into dopamine.