GPT and Thrombocytopenia: Abnormalities in laboratory tests may occur in patients receiving levodopa.[23,24,25] These include elevations in liver and kidney function test parameters, such as alkaline phosphatase, serum glutamic-oxaloacetic transaminase/aspartate aminotransferase, serum glutamic-pyruvic transaminase/alanine aminotransferase, and bilirubin levels, and abnormalities in BUN and creatinine levels.[23] Thrombocytopenia has also been reported.