A concept generally used in relation to the approach to preventing alcohol related harm and problems. As a legal and socially accepted drug or substance for many cultures the policy promoted in many countries is to encourage "responsible use" of alcohol which means limiting the amount drunk at any one time or over a period or even abstaining from drinking when harm might occur as a result of the intoxication levels. E.g. when about operating machinery or on work duty, driving, responsible for children, avoiding mixing when on medication, etc.