depression
"I started out on a quarter of a 50 mg Trazadone tablet every other night at bedtime.  I did this for a week then increased to a quarter tab every night.  After two nights of one quarter tablets I started waking with a stuffy nose and a headache.   Morning 3, I was in a full blown migraine and had to take zomig.  I have attempted this exact process 4 times now with weeks in between (no trazadone) to make sure it is a side effect of the medicine. Now, I am sure Trazadone is causing the headaches and I never have taken more than 1/4."