Tired

My FFS surgeon put me on a new medication and coupled with the Effexor XR I take for my depression, it's making me so sleepy. Both drugs are known to cause drowsiness and I guess I haven't had enough time to adjust to the new medication, thus it's all I can do to stay awake. I slept till noon today, got up for a couple of hours and went back to bed and slept two or three more hours. One would think that would have done the trick but one would be wrong. It's only 6:30 and I could go right to bed and sleep till morning. Add in the fact that it's getting dark now about 5:30 and it gets even worse. I need a nap.