My husband died suddenly with Parkinson's disease almost 3 years ago. When I complained about being kicked and hit he said that he bet someone else could sleep with him. I just laughed. Even the cat would run off when he started running in his sleep.
He took high doses of melatonin that stopped the sun downing in the middle of the night, (running outside and falling face down in the dirt ) but nothing really helped him sleep.
There are few things harder than being your husband's caretaker. I still have nightmares about it.