depression
"I have been taking Trazodone for nearly 18 years. For the most part of this period I have taken 150mg dose. I have never experienced any severe side effects on this medication. However if I miss a dose, I have incredibly bad nightmares and very agitated. To a lesser degree whilst taking these tablets I have a very dry mouth, slight dizziness when standing. The positives are a slightly lifted mood and reduced anxiety. 

More recently I have been prescribed 300mgs, this was to help with anxiety and extreme depression. The increased dose worked brilliantly for the anxiety and depression, however I experienced Priapism and was reduced back to 150mg."