Sinemet Carbidopa; Levodopa tablets What do carbidopa-levodopa tablets do?CARBIDOPA-LEVODOPA (Atamet(R), Sinemet(R)) is used to treat Parkinson’s disease. Levodopa can help correct an imbalance of chemicals in the brain caused by Parkinson’s disease. Levodopa will not cure Parkinson’s disease, but will help to control the symptoms. Carbidopa helps levodopa work better, and this can decrease some side effects, such as nausea. Generic carbidopa-levodopa tablets are available.