Don’t drink at all or drink within safe limits

For most people, a glass of wine or a pint of normal-strength beer a day does no harm (and may even do some good) but drinking above that level increases blood pressure, which can lead to heart failure.
Alcohol is measured in units therefore a pint of typical strength bitter (about 4% alcohol) contains two to three units, and a glass of wine can contain anything from 1.5 to more than three units, depending on the strength of the wine and size of the glass. Men who regularly drink more than three to four units of alcohol a day, and women who regularly drink more than two to three units a day are likely to be damaging their health. Heavy drinking over a number of years can damage heart muscle, and lead directly to heart failure, as well as having many other harmful effects on your health. It also causes weight gain because of the calories in alcohol.
Binge drinking is particularly likely to increase blood pressure and increase the risk of heart failure. The alcohol intake that amounts to binge drinking may well be lower than you think, and reflects the levels of heavy drinking in a single night that start to seriously affect health. For a man, binge drinking is more than eight units in a night (about three pints of beer with 5% alcohol), while for a woman, it is about six units in a night (three standard or two large glasses of wine).