I was on amitriptyline for problems with sleep when I was first diagnosed with depression. I felt drowsy all the time while I was on it. But I was on 25mg and that might have been too high a dose. The other big problem I had with it was dry mouth - I drank a lot of water while I was taking it. I was only on it for a few weeks until the SSRI kicked in and I got my sleep/wake cycles back. It did help me to sleep and wake up feeling rested so I could keep working while I waited for the SSRI to reach a therapeutic level.