Thank You...my Husband Has Been Scary Mean Since He Started

Thank you...my husband has been scary mean since he started Proscar 2mos ago for BPH w/one episode of retention. I begged him to get off of it on the 3rd day after I did some research...he won't!...that stuff works fast and I understand it has a half life. He's 72 and I'm 63 and we had a great sex life...overnight all that changed. I want to leave this new creature and get my husband back...he does NOT recognize any changes...what can I do? He actually gives me evil looks and acts like hE'S nuts. im tired IGUESS MONEY'S MORE IMPORTANT THAN LIFE...