Sinemet is classified as a combination medication that contains two active ingredients, carbidopa and levodopa. Carbidopa helps prevent the breakdown of levodopa before it can reach the brain and be converted to dopamine. It is primarily used to treat symptoms of Parkinson's disease.

Levodopa itself is not well tolerated, which is why it is combined with carbidopa. Carbidopa decreases peripheral metabolism of levodopa, which allows for lower doses of levodopa and less-severe side effects.

the two most-commonly prescribed forms of levodopa include an amino-acid-decarboxylase (AADC) inhibitor: carbidopa (in Sinemet) or benzaseride (in Madopar).

yes

No, it is a purer form of the over the counter remedy 'Dopa Mucuna,' a mood enhancement suppliment; however, make no mistake, although Levodopa is over the counter it is still a psychoactive drug with potential side effects.