taking benzos (or other similar drugs) AND drinking is never ever a good idea. this does not put your head in a good place at all and messes with your decision making.
if you feel the medication is not resolving the anxiety issues, you are best talking to your doctor about dosage and other options, rather than just deciding to take more or to add alcohol.
anxiety meds work best when coupled with counseling/therapy. there is no magic pill to fix things. but with a capable professional we can work through our issues and come out the other side.