Carbidopa USP For Compounding (API)Carbidopa USP active pharmaceutical ingredient (API) is a type of drug substance used in the manufacture of medications for the treatment of Parkinson's disease. It works by increasing the level of a chemical called dopamine in the brain, which helps to control movement and other functions affected by Parkinson's disease. Carbidopa is often used in combination with levodopa, another API, to enhance its effectiveness and reduce side effects. It is