In 2015, arterial hypertension was responsible for 18.1% of the total deaths in Mexico and its mortality rate has increased to 29.9% in the last 6 years. It is currently the main risk factor for preventable premature deaths of adults in the country. Good quality epidemiological information is the first step to improve health services. May Measurement Month 2018 (MMM18) in Mexico is an opportunistic survey, which follows the previously published methodology. MMM18 included screening 10 139 participants, 2187 (21.6%) of whom were classified as having hypertension. Of these, 42.0% were aware of the condition before measurement, and 38.0% were on medication, of which 66.5% were controlled. Hence, of all hypertensive patients, 25.3% were controlled (