Home » Ortho Related » Medications » Carbidopa/Levodopa (Sinemet) Carbidopa/Levodopa (Sinemet) September 17, 2020July 22, 2020 by Data Trace Editor - For Parkinson's dz; Start at 10/100 mg bid/tid; titrate as needed; - May cause psychic disturbances, orthostatic hypotension, dyskinesias, cardiac arrhythmias; * may promote bone healing L-dopa in the treatment of nonunited fractures.