A drug is any substance that changes the way you think, feel, or behave.
Legal substances, such as alcohol, tobacco, and cannabis are commonly used. There are also illegal substances such as cocaine, LSD, amphetamines, and heroin.
Prescription medicines such as painkillers, sleeping pills, and anti-depressants are meant to be used under a doctor's supervision. But many prescription medicines are not used the way they were prescribed.
Substance use can cause problems in your life. It can affect your health, relationships, job, and finances.
If you're concerned about your or someone else's substance use, or you want to learn more about substance use, call the Addiction and Mental Health Helpline, any time of the day or night, at 1-866-332-2322 (Alberta only).
For help to quit smoking or using smokeless tobacco, go to albertaquits.ca.
Current as of: June 1, 2023
Author: Poison & Drug Information Service, Alberta Health Services
This material is not a substitute for the advice of a qualified health professional. This material is intended for general information only and is provided on an "as is", "where is" basis. Although reasonable efforts were made to confirm the accuracy of the information, Alberta Health Services does not make any representation or warranty, express, implied or statutory, as to the accuracy, reliability, completeness, applicability or fitness for a particular purpose of such information. Alberta Health Services expressly disclaims all liability for the use of these materials, and for any claims, actions, demands or suits arising from such use.