Dear Susan, There are many possible reasons for leg cramps; one possible cause in older adults is a change in eating patterns such that the person ingests too little calcium, magnesium, and/or potassium. I would speak with her physician, who can best advise whether this might be the case, and if so, can refer her to a registered dietitian. An RD can help her plan a regime that will work with her Parkinson's disease. My very best regards, Kathrynne > Is there anything that will help my mother's leg cramps? A drug or > what? > -- Kathrynne Holden, MS, RD "Nutrition you can live with!" Medical nutrition therapy http://www.nutritionucanlivewith.com/ Tel: 970-493-6532 // Fax: 970-493-6538