I hope all is well.
I’m sorry to hear that your husband has been experiencing sleep issues. Unfortunately, this is actually a very common symptom of Parkinson’s and we have an entire 'Sleep ’ section on the Parkinson’s UK website, here for further information on it.
We also have a helpline service which you can call on 0808 800 0303 for further advice on how to manage your husband’s sleep condition along with the help available to you both.
I hope you find the above information useful.
All the best.