My husband takes amantadine in addition to his Sinemet for energy. Also we started on Merentine and I’m seeing a big change in energy, speech, social participation. Please know he works out with trainers 4 to 5 times a week. Half dose Miralax per day is taking care of constipation. High interval intensity training-HITT I believe is helping him as well to produce his own dopamine. May be helping with constipation. The YMCA has adaptive training programs for Parkinson’s and the cost is minimal. Medicare will pay for physical therapy as long as you are progressing. He’s the best he’s been in 3 years.