insomnia
"At first amitriptyline helped me sleep and for the first two nights I slept thoroughly. Now I'm having the opposite effect and it gives me insomnia as most SSRI's do. Now if I take even 10 mg it is almost impossible to sleep that night and difficult to sleep for the next 3 days. It's been 3 or 4 days since I've taken it and I still feel like it's interfering with my sleep. If you're sensitive to SSRI's do not take this for insomnia."