Try a gluten free diet & probiotics.
get him to the Dr. ask for pain management for times like this. he will mellow right out.
Get him to fast for about ten days. There are lots of fasts out there, water, carrot juice, vitamin C water etc. The closest to consuming nothing but water is best. He should start to feel relief pretty soon. The problem is the flora in his gut is messed up. A fast will kill off the bad flora and encourage the healthy flora. After the fast, from which you have to work up slowly to a normal diet, make sure he eats well.
please don't listen to these people suggesting gluten free diets and fasting. there is no evidence these are a treatment for IBS. a diet that has had successful results is a low-FODMAP diet. It can be tricky but many people swear by it. I am an IBS sufferer and have nothing but sympathy for you and your husband. He may be feeling worthless, humiliated and depressed because of his condition and antidepressants, a gastroenterologist, a dietician and counselling may help him manage this. The important thing is to never get mad at him if he soils himself or is having an attack. He's depressed enough. You can help him by researching a low-FODMAP diet, giving him peppermint and chamomile teas, attending counselling with him and directing him to support groups where he can vent (it's important that when you have a chronic illness that you have a space to let off some steam about how sick you are). You seem like a kind and caring person who really loves him, OP, he is very likely feeling really lucky to have you in his life. Having at least one person who cares and wants to help and support them is important too. IBS is a horrible thing to live with but he doesn't have to give up and be depressed, there's a light at the end of the tunnel.
