It seems the effect on blood pressure is reversible if you stop drinking. In one study,25 13 out of 18 heavy drinkers saw their blood pressure return to normal levels after one month of abstinence. However, if you’re a heavy drinker, you’ll need to cut down slowly rather than cut it out immediately, or you may get a rebound effect of very high blood pressure from the noradrenaline surge that comes with withdrawal.