question: In the last 3 months I have started taking Effexor XR with my Vyvanse. My Effexor is 37.5 mg once daily and my Vyvanse is 60 mg once daily. Over the last two months I have been experiencing a lot of nausea. However the last three weeks it has gotten worse and there are other things going on. I have been shaky, muscle weakness, fatigue, headaches, general nervous feeling, headaches, chills (not with fever), cloudy mind. Am I having a reaction to the two medications being mixed? What do I need to do to get off the effexor if I am?