I was diagnosed with fibromyalgia and ultracet has helped me function. The pain from this disease is horrible and this is the only drug that helps it. I take it only when I'm in pain and I don't take it with any other thought in mind. I only take it for pain. To me, this medication is a miracle and I've been on it for over a year with no side effects. When I'm not in pain, I just don't take it, and it doesn't affect me in any way. Sometimes I think that medication does to you, what you want it to do. I don't feel hi when I take it, it just takes away the terrible pain...thank God for this drug.