There is an abundance of evidence describing the impact of Ramadan on people with T2DM from retrospective to population-based studies. However, there is a lack of evidence available to help guide the management of people with diabetes who wish to observe Ramadan. Fasting and feasting during this holy month can cause health risks for people with diabetes. The Epidemiology of Diabetes and Ramadan 1422/2001 Study ("EPIDAR") was a large population-based, international epidemiological study of diabetes conducted in 13 countries with Muslim populations. One of the aims of this study was to determine the potential effects of fasting in people with diabetes on their well-being and the management of this condition. They observed a 7.5-fold (from 0.4 to 3 events per 100 per month) increased risk of severe hypoglycaemia in patients with T2DM as a result of a change in eating patterns during Ramadan. Severe hypoglycaemia was defined as hypoglycaemia leading to hospitalization. Additionally a 5-fold increase in the incidence of severe hyperglycaemia with/without ketoacidosis was observed in patients with T2DM.