I got my wisdom teeth pulled and they gave me some Vicodin. I used it and it removed my pain. I got a bad headache at the end of the healing process and I took one and it relieved the pain like nothing I have ever taken. I can see how people with pain become addicted because it removes it so fast. Get someone with a constant back problem and I can see how it could happen.
My sister would be the perfect example of that. She has had back problems (exasperated by a botched back operation) for many years. Only the Vicodin she takes makes her life bearable.