What Is The Dosage Of Lovan Or Pristiq For Depression?

Hi there.. I ve been taking LOVAN 1 tablet a day for my depression and I decided after 4years to stop taking them. I gradually got off them by going to 1 tablet ever second day. I stopped Bec I had no Lobito.... I feel ver anxious and feel like I can make decision etc etc. my cousin told me about Prostiq and I m thinking of discussions with my doctor. Can you tell me the difference on each medication. I was on 20mg with Lovan and I hear Prostiq has a 50mg and a 100mg...I m worried that this might be too much compared to what I was on...thank you