Amitriptyline
"Was prescribed as a post impact headache help. 

After taking 10mg per night for about 10 days, I spent an entire night unable to sleep with what felt like heart palpitations. This was scary.

Immediately stopped taking it of course, but the next night woke up at 3, thought it was time for work, and made coffee. I slowly came out of a fog and realized the time (I usually get up at 6). 

Previous I had noticed what seemed to be seeing things out of the corner of my eye while driving, but that is no big deal. My better half had mentioned I seemed to care less about things as well.

I see it works for most and that's great. But like any medication be sure to pay close attention."