carbidopa
noun
car·bi·do·pa ˌkär-bə-ˈdō-pə 
: a drug C10H14N2O4·H2O that inhibits decarboxylation of L-dopa in tissues outside the brain and that is administered with L-dopa in the treatment of Parkinson's disease to increase the amount of L-dopa available for transport to the brain
Example Sentences
Recent Examples on the Web Hinz's most controversial claim is that carbidopa — a component of the prescription Sinemet, the mainstream treatment for Parkinson's — is associated with greater death rates from the disease. 
Joe Carlson And Brooks Johnson, Star Tribune, 23 July 2021 Turns out that certain intestinal microbes can also digest the drug, and, surprisingly, carbidopa does not stop them. Claudia Wallis, Scientific American, 1 Jan. 2020
Joe Carlson And Brooks Johnson, Star Tribune, 23 July 2021 Turns out that certain intestinal microbes can also digest the drug, and, surprisingly, carbidopa does not stop them. Claudia Wallis, Scientific American, 1 Jan. 2020 Word History
First Known Use
1972, in the meaning defined above
Medical Definition
carbidopa
noun
car·bi·do·pa ˌkär-bə-ˈdō-pə
: a drug C10H14N2O4·H2O that inhibits decarboxylation of L-dopa in tissues outside the brain and that is typically administered in combination with L-dopa in the treatment of Parkinson's disease to increase the amount of L-dopa available for transport to the brain
Note: Trademarks for preparations containing carbidopa include Duopa, Lodosyn, Parcopa, Rytary, Sinemet, and Stalevo.