Please discuss this with your doctor first. First. If you have legitimate reasons (such as the need to drink alcohol) then it should be no problem convincing your doctor. But in any case, your doctor is the one responsible for your prescription and assumes (well, why not?) that his patient (you) is taking it according to plan. It would be unreasonable for you to go off it without the doctor's knowledge--and may be dangerous for you to do so without doctor's help.

I hope you make a good decision.