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Benserazide 
An inhibitor of DOPA DECARBOXYLASE that does not enter the central nervous system. It is often given with LEVODOPA in the treatment of parkinsonism to prevent the conversion of levodopa to dopamine in the periphery, thereby increasing the amount that reaches the central nervous system and reducing the required dose. It has no antiparkinson actions when given alone.     
Pharmacological Action Antiparkinson Agents; Dopamine Agents; Enzyme Inhibitors
Other names Seryltrihydroxybenzylhydrazine; Serazide; Ro 44602; Ro 4 4602; Benzylhydrazine, Seryltrihydroxy; Seryltrihydroxy Benzylhydrazine; Ro 4-4602; DL-Serine 2-((2,3,4-trihydroxyphenyl)methyl)hydraz; Seryltrihydroxybenzylhydrazine; Serazide
 
SubstanceCAS Registry & nameCategoriesSourceDrugs*
madopar  37270-69-2   *Benserazide *Levodopa Drug Combinations Dopa Decarboxylase/antagonists & inhibitors. 
Pharma Action Enzyme Inhibitors ; Dopamine Agents
Acta Neurol 28(2):208;1973; Acta Neurol Scand 53(3):189;1976; Br Med J 1(5957):573;1975; Wien Med Wochenschr 123(26):433;1973