The present disclosure provides a method for the treatment of Parkinson's disease comprising simultaneously or sequentially administering to a patient in need of treatment of Parkinson's disease a dosage form comprising (i) levodopa in an amount ranging from 50 mg to 300 mg, (ii) carbidopa in an amount ranging from 25 mg to 150 mg or a therapeutically equivalent amount of another aromatic amino acid decarboxylase inhibitor, and (iii) entacapone in an amount ranging from 50 mg to 300 mg, wherein the proportion of entacapone to carbidopa in said dosage form ranges from 0.3:1.0 to 3.2:1.0 by weight, a moderately potent COMT inhibitor in an amount ranging from 25 mg to 200 mg, wherein the proportion of said COMT inhibitor to carbidopa in said dosage form ranges from 0.16:1.0 to 3.08:1.0 by weight, or a highly potent COMT inhibitor in an amount ranging from 1 mg to 100 mg, wherein the proportion of said COMT inhibitor to carbidopa in said dosage form ranges from 0.006:1.0 to 1.54:1.0 by weight. Pharmaceutical dosage forms used in said methods are also disclosed.
