I had this prescribed to me recently by my Doctor, The first dose wasn't that bad, but the second third and fourth nearly blacked me out. I've had Numbing of the tongue and lips, Chills, Nausea, Headaches, upset stomach, very dizzy constantly now for 4 days and it has worsened my PVC's, I've actually been bed ridden for 95% of the time since I started taking this. And it's only 37mg. Has anybody else experenced this before?