“…The results indicate alcohol (Birhanu et al, 2014 Ghebremichael et al, 2009;Glozah et al, 2015;Kalema et al, 2015;Koopman et al, 2008;Medley et al, 2014;Onya et al, 2012;Papas et al, 2012;Peltzer & Pengpid, 2012;Schneider et al, 2016;Takahashi et al, 2018Takahashi et al, , 2017Watt et al, 2016;Wechsberg et al, 2008) as the most predominantly used substance in most of the countries. The second commonly reported type of substance used in other countries is cigarette smoking (Ali et al, 2012;Birhanu et al, 2014;Embleton et al, 2013;Gravely et al, 2018;Jradi et al, 2013;Peltzer & Pengpid, 2012;Sreeramareddy et al, 2014;Takahashi et al, 2017). Additionally, studies from South Africa indicate a variety of substances used such as alcohol (Cubbins et al, 2012;Koopman et al, 2008;Medley et al, 2014;Onya et al, 2012;Peltzer & Pengpid, 2012;Schneider et al, 2016;Watt et al, 2016;Wechsberg et al, 2008), methamphetamine (Meade et al, 2015;Mushanyu et al, 2017;Wechsberg et al, 2008), amphetamine-type stimulants (ATS) (Scheibe et al, 2016), heroin (Scheibe et al, 2016;Wechsberg et al, 2008), cocaine (Wechsberg et al, 2008), crack cocaine (Wechsberg et al, 2008), tobacco (Wechsberg et al...…”