When I lie down, my face gets blood red, then standing up, really red again?been on pradaxa for a year for atrial fib. nausea, gas, bloating was all I noticed first. Lately, I noticed the blood rushes to my face when I lie down at night and when I sit up it does the same. only when I am standing does this go away. I feel cold all the time. I blame this on Pradaxa. at a recent physical, my blood tests showed an abnormal liver result and my doctor asked me if I drank much. I don't drink at all. Is this a result of Pradaxa??? please help me.I am considering going back on warfarin. Yes, the blood tests were a nuisance but I understood where I stood with it. NOW I don't know what is going on in my body with this drug.