My husband is a pain pill addict. It started 7 years ago. When he was a teenager he should have lost his leg but it was saved. It has caused him pain since. The doctor put him on perks. For about a year they were taken as prescribed, but they stopped working for him. So...he starting buying them from my ex best friend of 26 years behind my back. I was clueless for 2 years. Well...more like stupid. He starting to get sick. He was going to the er nonstop. Sometimes he was so bad he would stay for days at a time. We were co-managers of a local fast food place and I was having to cover for him. This went on for 2 more years. I figured out that it was pills causing all this. I couldnt get anyone to listen to me. He was snorting and smoking these pills cause he stomache eas so messed up. The last year of this I had a mental breakdown. I was crying hysterically for days. The whole time i was at work. The whole time i was in college. The panic attacks were insane. I never thought i was going to die during one....but i sure did wish for it. So...he leaves for 4 months to rehab. When he got back..life went back to 'normal' but although i was on meds and did some counseling...I wasnt well. We went on with life but never worked on me or our relationship. On his 1 year anniversary he relapse. I again had a mental break down. I called off work for 2 weeks for the first time in my life. He has detoxed and stopoed the pulls again. Hes doing out patient rehab this time. Im once again fighting to keep myself together...to make it thru the day. Its all an act. I so badly need my husband back. But its killing me. Heart palpitations, throwing up at least 3 times a week for no reason. Chest pains, no energy. Headaches and neck aches. Is it time to just cut my loses and leave the situation? Will I ever really get over this. Is my life as i dreamt it unreachable? I know he loves me and doesnt abuse me... But.... 
That is such a hard situation. I guess it really depends on if he is actually trying to get better, and if you have kids makes a difference too. If you have kids it's not healthy to have them in that kind of environment so I would say to remove yourself and them from it for now. But if he is really trying to get help and is just not strong, it's hard to say for you to just leave him. If it's ongoing and he can't find the willpower after years of trying to quit, then maybe it is time to give up on your relationship with him bc it's obv not healthy for you either, to be dealing with that. It really depends on his level of effort I guess. I really hope you can figure out a solution and I hope things work out for you.