Suggest Treatment For Cardiomyopathy In A Patient With Parkinson S Disease

My sister Mrs Shah 93 years, osteoporotic, suddenly showed worsening of Parkinson problem despite taking tab Syncapone 100 three times a day for last 4 months. Our neurophysician was baffled. other cardiac drugs taken by her have no reported side effects. Doctor thought of excess Calcium. S.Calcium when tested of Mrs shah is 12.7 mg/dl (normal range reported to be 8.5-10.5 mg/dL). Mrs. shah is a very frail lady about 4.8 tall and weighing 28 kg. Except for cardiomyopathy, she is healthy. Please advise how to lower S. Calcium value. Thanking you, Virbala shah from Mumbai, India