In Ontario, the number of people who present to hospital emergency departments with self-harm is difficult to accurately assess, but the best estimate is about 30,000 each year. The most common form of self-harm seen in emergency departments (around 80% of episodes) is the intentional consumption of an excess of a medicinal or toxic product, whether or not there is evidence that the act was intended to result in death. Injuries, most commonly self-cutting, form 15-20% of episodes.