... weeks ago for severe anxiety. It seemed to work great for about 2 weeks. Then I had a major back set with the anxiety overnight. My psychiatrist increased it to 50 mg. 3 times a day. When I was on the 25mg. no grogginess, but on the 50 mg. I stay groggy. I've only been on the 50 mg. for 4 days. Will this go away when my body gets used to it? I also take 1mg. Xanax 3 times a day along with 100 mg. of Pristiq. I've been on the xanax and pristq for about 3-4 years. I would appreciate any info out there. Thank you and God Bless