I have been taken only 25mg of trazodone for about a year now for sleep. Trying to come off and doc said to cut that in half for 1 month. I just started on Wednesday. I am not sure if the hives are related to this because they are not all over my body. I have one big one on my neck 2 on my chest 3 on the back of my head and a cluster on my shoulder. they are all on the left side. Just seems weird that if it was from this it would be all over? So if any one else has had this I would greatly appreciate hearing.