Hi,
Ropinirole did it for me, I gambled away a fortune, I am off it now and hopefully your husband is off it too. It changed my personality in such a negative way. I was aware of the damage I was heaping on Maddie, sometimes I just couldn't stop. I did have the humility to apologise for my behaviour, but it took it's toll on our relationship. I still see her from time-to-time and we enjoy each other's company much more now, so there is light at the end of the tunnel. The problem is that your husband needs to accept that he is being unreasonable before it can get better. I have witnessed many Parkinson's patients that take a one-dimensional view of their illness i.e. "Poor old me". They take no notice of how it is affecting the people close to them, and remain angry all the time. This behaviour is also prevalent in other Chronic illnesses e.g. MS.
If you wanted me to speak to him directly please let know, as I have lost the most important centric person in my life. I yearn to be back with Maddie, but I know it will never happen. I might be able to help him realise what he may lose. Did the mood swings start after you married?