SPL Set ID: aa5028d6-fd0a-4cf1-b708-c93bb2a7c76a
1 drug(s) with this SPL Set ID
Carbidopa and levodopa extended-release tablets, USP are an extended-release combination of carbidopa and levodopa for the treatment of Parkinson’s disease and syndrome. Carbidopa, USP, an inhibitor of aromatic amino acid decarboxylation, is a white, crystalline compound, slightly soluble in water, with a molecular weight of 244.25. It is designated chemically as (-)-L-α-Hydrazino-3,4-dihydroxy-α-methylhydrocinnamic acid monohydrate. Its molecular formula is C 10 H 14 N 2 O 4 •H 2 O and its structural formula is: Tablet content is expressed in terms of anhydrous carbidopa, which has a molecular weight of 226.23. Levodopa, USP, an aromatic amino acid, is a white, crystalline compound, slightly soluble in water, with a molecular weight of 197.19. It is designated chemically as (-)-3-(3,4-Dihydroxyphenyl)-L-alanine. Its molecular formula is C 9 H 11 NO 4 and its structural formula is: Each extended-release tablet, for oral administration, contains either 25 mg of carbidopa and 100 mg of levodopa or 50 mg of carbidopa and 200 mg of levodopa. In addition, each tablet contains the following inactive ingredients: FD&C Blue No. 2 Aluminum Lake, FD&C Red No. 40 Aluminum Lake, hydroxypropyl cellulose, hypromellose, and magnesium stearate. The 25 mg/100 mg tablets are purple, oval, unscored tablets debossed with MYLAN on one side of the tablet and 88 on the other side of the tablet. The 50 mg/200 mg tablets are purple, oval, scored tablets debossed with MYLAN on one side of the tablet and 9 to the left of the score and 4 to the right of the score on the other side of the tablet. Carbidopa and levodopa extended-release tablets are designed in a drug delivery system that controls the release of carbidopa and levodopa as the tablets slowly erode. The 25 mg/100 mg carbidopa and levodopa extended-release tablet is available to facilitate titration and as an alternative to the half-tablet of 50 mg/200 mg carbidopa and levodopa extended-release. FDA approved dissolution test specifications differ from USP. Carbidopa Structural Formula Levodopa Structural Formula