A member asked:

Why can't dopamine cross the blood brain barrier?

A doctor has provided 1 answer
Dr. Zeyad Morcos answered

Specializes in Neurology

Biochemistry: Actually this why we give patient Levodopa-Carbidopa together, or SINEMT. Dopamine just as molecule can not, but Levo can. Levodopa is a prodrug that is converted to dopamine by DOPA decarboxylase and can cross the blood-brain barrier.

Answered 8/29/2018

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