pain
"I have cervical stenosis.  I can live with the varying levels of pain and discomfort through the day as long as I'm able to move around and change positions.  But lying down in bed and trying to sleep was a serious problem for me.  I couldn't fall asleep until I was really exhausted and even then I was wakened after an hour or less by pain.

My doctor prescribed Percocet 5/325.  The full tablet was a bit strong but it did the trick.  I fell asleep after ten minutes and slept for six straight hours.  I then split the tablets and take one ten minutes before lying down.  That gets me to sleep and I sleep for about four hours.  When I wake up (usually in pain) I take the other half and I'm good for the day.  That's been my regimen for two years."