Fioricet is great for relieving tension headaches and migraines, I'm told. It's also a product that seems to be much in demand, if you look at search figures on some blogs. I've known some people who suffer from tension headaches, and have to lie in a dark room. In fact, I remember that one of my exes, who had a very controlling mother, used to be quite gleeful when his mum was suffering (dreadful boy!) because it meant he could stay out late without having to answer to anyone. Mind you, all that freedom didn't lead to anything much – just getting in after 1am was enough rebellion for him.