Hand sanitizers are ubiquitous. They are used by staff in hospitals, and many people keep a small bottle of hand sanitizer in their bags or purses. The active ingredient is often some kind of alcohol, such as isopropanol (rubbing alcohol) or ethanol (the drinkable kind). New research published in the American Journal of Infection Control suggests that professionals who administer breath alcohol tests should stay away from sanitizers that contain ethanol, as they can cause breathalyzers to produce a false positive result.
http://acsh.org/news/2016/12/03/hand-sanitizer-can-cause-false-positive-breathalyzer-test-10525