I wrestle with this issue myself at times. There is the whole HALT issue, not to let ourselves get too Hungry, Angry, Lonely or Tired, and not sleeping can be a huge trigger for me.
I do sometimes take an antihistamine to help me sleep. If all you need is help sleeping, I'm with the others, stay away from Tylenol unless indicated for pain. It' is way harsh on the liver.
There are a lot of non medicine ways to address sleeplessness as well.