My Dad's caregiver has suggested that we give him an Amino Acid to help him sleep. It contains 1200mg Lysine, 900mg Ornithine, 1200mg Arginine. It is said to work on the brain chemistry. I was very concerned about giving it to him along with his 25/100 mg sinemet 4X a day. If anyone has any information for me I would appreciate it. [log in to unmask]