According to the United Nations Office of Drugs and Crime, around 284 million people aged between 15 and 64 years used drugs in the year 2020. In addition, it is estimated that over 11 million people were injecting drugs and half of these were living with hepatitis C. Young people are using more drugs than previously, and numbers have increased over the past decade. While numbers are estimated at a global level, there remains little evidence for practitioners...