It took about two weeks before the medication started working. The first week I felt a bit sick and dizzy but it was ok to deal with if I took them at night. In the beginning I had problems sleeping but after a short time this turned to sleeping a lot instead. It works great for me, canīt remember when I felt so good before, Iīm happier and it is easier to deal with any kind of problems I have. I can think calmer about everything now. I does have some side effects for me. I sleep great but I need about 10 hours every night. I have night sweats and I dream a lot but the nightmares are gone...And although I donīt feel sick constantly I found out that it doesnīt take much for me to get heat illness now so I got to be careful in the sun.