What is Substance?
Substance use disorder is an addiction where the person experiences discomfort or withdrawal symptoms when they are unable to use the substance. Their lives are dominated by getting and using the substance. These can be legal (alcohol) or illegal (poppy husk). When a person is using substances in a dependent fashion, they continue to use them despite evidence that using substances is having a negative impact on their physical health e.g. developing infections, liver damage from drinking, psychological health e.g. depression, irritability, anger, insomnia, social health e.g. poor pro-social support, limited progress in education and employment avenues.