The SSRIs are know to affect all three stages in some people. Delayed orgasm is known to occur in many people. Indeed some of these drugs are now widely used to help treat premature ejaculation. If this does seem to have happened, you should discuss this with your doctor, as a change in dose, when you take the dose or drug may help reduce any problem. With trazodone, a serious condition known as priapism has been reported very rarely.
Priapism occurs in men and is defined as a persistent painful erection without sexual stimulation.
It is no joke and should be treated as an emergency, as it can cause permanent damage. If this should happen, you should go to a hospital accident and emergency department as soon as possible, and certainly within a couple of hours. These drugs may make you feel drowsy, although this effect is less than with other antidepressants. You should be careful as they may affect your reaction times or reflexes. They are not, however, sleeping tablets, although if you take them at night they may help you get to sleep.