Paul and I oversaw the care of my step-mother for almost eight years. She did not have PD but will share some of the secrets we learned from the convalescent home. For constipation they gave her milk of magnesia laced with cascara. It looked like one of those beautiful desserts one orders in a French restaraunt. The milk of magnesia was the white background with the brown cascara sworled through it. The dose was in a very small cup taken with a chaser of juice of apple sauce. There was one other use for milk of mag. that I have never seen or read about anywhere. For pressure sores it was swabbed on the sore with a "Qtip."