ASSIST is designed to be used in primary health care settings where hazardous and harmful substance use among clients may go undetected,or become worse. The ASSIST (version 3.1)is an 8 item questionnaire designed to be administered by a health worker to a client using paper and pencil,and takes about 5-10 minutes to administer. The ASSIST was designed to be culturally neutral and useable across a variety of cultures to screen for use of tobacco products,alcohol,cannabis,cocaine,amphetamine-type stimulants (ATS),sedatives and sleeping pills (benzodiazepines),hallucinogens,inhalants,opioids,and 'other'drugs.