Drugs other than those listed here may also interact with carbidopa. However, levodopa, the metabolic precursor of dopamine, does cross the blood-brain barrier, and is converted to dopamine in carbidopa online na dobirku the basal ganglia. Canadian residents should call their local poison control center directly. Browse: Unanswered questions Most-recent questions Reference library Enter word or phrase. Rarely convulsions have however causal relationship with SINEMET has not been established. This has been demonstrated when carbidopa is given before levodopa and when the two medicines are given simultaneously. Carbidopa may also be used for purposes other than those listed in this medication guide.