insomnia
"I've been taking trazadone for about five years and it works great for me.  At one point my dose was up to 200mg but I decided to taper it back slowly because I felt that it was too much and I still get the same effect from just 100mg now.  My only annoying side effect is that it sometimes really dries out my mucus membranes (mouth and nose).  Especially my nose, to the point where it's hard for me to fall asleep because I have to breathe through my mouth."