What should be normal when first starting Viibryd?

With the caveat that every person may have their own unique response to a medication, I would suggest that what you are experiencing in not "normal". I'm wondering though if what you are experiencing is more related to withdrawal from 20 mg of Trintellix? Did your Doctor slowly taper you off the Trintellix? Is the Trintellix completely out of your system? I have been on both medications, in part, due to an impression that the medications were similar to one another. However, for me, the medications seem like polar opposites. I found Trintellix too be way to stimulating! 5 mg of Trintellix was tolerable but at 10 mg my thoughts were racing uncontrollably. I had to go back to Viibryd which I find to be quite mellow. Viibryd, for me, just produces a seemingly balanced and organic like sense of well being.

I would suggest You give the Viibryd more time if you can. 10 mg is just a starting dose and really isn't a therapeutic dose for MDD. However, based on my experience with Trintellix (I kept thinking my response was temporary and tried to tough it out until I literally could not stand it any longer), I would urge anyone to go with their gut and if they believe a medication is creating a reaction which is torturous, that they cease the medication immediately.

All the best and take care for now.