Janet, the only reason I found out about it is that when I went up in dosage on my trazodone recently my RLS came back like gang-busters. The only thing that seemed to calm it down was omega-3 tablets and 800mgs of ibuprofen. Strange I know.
Here is what I found out about the side effects.....

What side effects may I notice from taking trazodone?
Side effects that you should report to your prescriber or health care professional as soon as possible:
•fainting spells
•fast or irregular heartbeat (palpitations)
•painful erections or other sexual dysfunction
•skin rash
•trembling

Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):
•blurred vision
•constipation
•drowsiness, dizziness
•dry mouth
•headache
•muscle aches or pains
•nausea, vomiting
•unusual tiredness or weakness