Opioid addiction in many countries has risen considerably in recent years, leading to the increasing use of terms such as the Opioid Crisis and the Opioid Epidemic 1. Substantial international attention has focused on this issue following significant increases in opioid related overdoses resulting in death 1-2. This phenomenon has been particularly marked in countries such as the USA and the UK 3. It is estimated that in 2015 Europe experienced 8,441 deaths from opioid overdose 2. The European Monitoring Centre for Drugs and Drug Addiction (EMCDDA) notes that Ireland has also experienced a significant rise in opioid and methadone related deaths in recent years 2. Evidence suggests that on average heroin users will overdose three times in their lifetime 4, and that one in two heroin addicts will die from an overdose.