Drug rehabilitation is the term that is commonly used to describe the mental and psychological treatment and processes that an individual goes through when he or she is dependent on certain psychoactive substances. These substances can be alcohol, opiates, amphetamines, or any other psychoactive substance. Drug rehabilitation in Canada exists for the purpose of helping people get over their addiction, as addiction can often cause serious psychological and social problems if left untreated. There are many different types of drug rehabilitation treatments available. There are treatment centers that are designed to help people with certain types of drug addiction, there are outpatient facilities, there are inpatient facilities and many more. All different types of drug rehab centers in Canada serve the same purpose, however: help individuals fight their drug habit and make healthy decisions. If an individual needs help with his or her drug addiction, the first step to determining what type of drug addiction treatment center that he or she needs is to determine the severity of the addiction. People with severe addictions may need to be in a residential, or in-patient, facility, while others may only require the help of a support group.