Only taken two 40mg tablets so far- one this morning and one just a few minutes ago. They certainly seem to calm me down. Now I don't know if it's because I've had little sleep the past few days or the way I'm feeling at the moment but my head feels very fuzzy and when I went out I was very lightheaded. I'm obviously very tired but my joints ache a lot when I climb steps/stairs. I guess my question is is this normal or is this simply as a result of how tired I am after a very arduous few days?