I've been on pristiq 50mg for 9 weeks now. By far the most troubling side effect is poor sleep. Either I can't fall asleep, stay asleep or my dreams or so whacked out I don't feel rested or all of the above. I take the med in the morning. Melatonin doesn't help. My doc prescribed an antihistamine but I feel very groggy when I take that and it was prescribed for short term use only until/if i get over this hump. I'm tired and irritable !!! Any suggestions?