Multiple System Atrophy, Parkinson Variant

The main goal of this clinical trial is to learn if ONO-2808 works to treat adults with the Parkinsonian subtype of Multiple System Atrophy (MSA-P). Researchers will compare ONO-2808 to a placebo (a look-alike substance that contains no drug) to see if ONO-2808 works to treat MSA-P. Participants will: * Take ONO-2808 or placebo orally for up to 48 weeks * Make visits to the clinic for checkups and tests * Answer questions about their health throughout the trial.

The goal of this pilot clinical trial is to examine the safety and feasibility of SCONE as home based therapy for orthostatic hypotension and bowel dysfunction in individuals with spinal cord injury or multiple system atrophy. The main aims of the study are: * To establish a safe protocol for home-based transcutaneous spinal cord stimulation therapy at the research centre * To test the safety and feasibility of home-based transcutaneous spinal cord stimulation therapy on orthostatic hypotension and bowel dysfunction Participation will last approximately 10 weeks (excluding screening period) and involves * Attending the study center to collect baseline evaluations and to plan where electrodes will be placed * A 2 week treatment period at the centre with 3 visits per week * A 6 week home based therapy period involving 1 hour treatments twice a day * Attending the study center to collect post-treatment evaluations