insomnia
"I was prescribed Amitriptyline for insomnia after having a negative experience with taking Ambien. Ambien worked fine until its side effects kicked in then I stopped taking it because the side effects were unreasonable. 
Amitriptyline helped me sleep until one night I awoke to buzzing in my ears/head. 
From reasoning there might be lifelong buzzing in my head I discontinued the Amitriptyline. Shortly after discontinuing the buzzing went away and never returned. 
Bottome line: there are much better oral's to take to assist in sleeping.
I feel Amitriptyline did however correct a brain imbalance that was produced by the Ambien; and I found the culprit to my insomnia: I have an adrenaline allergy, from stress, anxiety and screen-time."