ChEBI: Carbidopa (anhydrous) is 3-(3,4-Dihydroxyphenyl)propanoic acid in which the hydrogens alpha- to the carboxyl group are substituted by hydrazinyl and methyl groups (S-configuration). Carbidopa is a dopa decarboxylase inhibitor, so prevents conversion of levodopa to dopamine. It has no antiparkinson activity by itself, but is used (commonly as its hydrate) in the management of Parkinson's disease to reduce peripheral adverse effects of levodopa. It has a role as an EC 4.1.1.28 (aromatic-L-amino-acid decarboxylase) inhibitor, an antiparkinson drug and a dopaminergic agent. It is a member of hydrazines, a monocarboxylic acid and a member of catechols.NCI Thesaurus (NCIt): Carbidopa Anhydrous is the anhydrous, levorotatory isomer of a synthetic hydrazine derivative of the neurotransmitter dopamine. Carbidopa, a peripheral dopa decarboxylase inhibitor, is used as an adjunct with levodopa to prevent levodopa degradation to dopamine in extracerebral tissue, thereby decreasing the peripheral side effects of levodopa. Carbidopa does not penetrate the blood brain barrier; therefore, it does not interfere with the central nervous system (CNS) metabolism of levodopa to the active neurotransmitter dopamine which, in high concentrations in the brain, has anti-parkinsonian effects. The hydrate of 3-(3,4-dihydroxyphenyl)propanoic acid in which the hydrogens alpha- to the carboxyl group are substituted by hydrazinyl and methyl groups (S-configuration). Carbidopa is a dopa decarboxylase inhibitor, so prevents conversion of levodopa to dopamine. It has no antiparkinson activity by itself, but is used in the management of Parkinson's disease to reduce peripheral adverse effects of levodopa. ChEBI: Carbidopa is the hydrate of 3-(3,4-dihydroxyphenyl)propanoic acid in which the hydrogens alpha- to the carboxyl group are substituted by hydrazinyl and methyl groups (S-configuration). Carbidopa is a dopa decarboxylase inhibitor, so prevents conversion of levodopa to dopamine. It has no antiparkinson activity by itself, but is used in the management of Parkinson's disease to reduce peripheral adverse effects of levodopa. It has a role as an EC 4.1.1.28 (aromatic-L-amino-acid decarboxylase) inhibitor, an antiparkinson drug, a dopaminergic agent and an antidyskinesia agent. It is a member of hydrazines, a hydrate, a monocarboxylic acid and a member of catechols. It contains a carbidopa (anhydrous).