Does Alcohol Have Any Adverse Effect On Beta Blocker?

I have been prescribed coumadin and then a beta blocker for atrial fibrulation, and after having a TIA. My drinking habit, one that I have had for many years is 1-2 drinks a day. I have taken the coumadin for three months, and it has kept my blood the way it should be, despite my drinking daily. However, I am about to start taking a beta blocker, and I am wondering if I can still drink moderately. Thank you..