Period
	The age of exploration: 1960–1975’	Higher education “just says ‘no’”: 1975–1990	Better than coffee? The new wave of drugs in academe: 1990–present’
Collegiate drug use prevalence in the US	Limited reporting: 20–25% marijuana prevalence127 2–11% LSD prevalence;128 collegiate amphetamine (amph) prevalence unknown	National longitudinal study (MTF, all %s below report past-year use prevalence in 1980):129 51.2% marijuana 6% LSD 22.4% amph (6.2% in 1988) 90.5% alcohol	(MTF past-year use prevalence % in 2011):130 33.2% marijuana 3.4% any hallucinogen 12.3% stimulant medications (up to 35% according to independent estimates131) 77.4% alcohol
Collegiate use motives of most concern in literature132	Primarily recreational	Primarily recreational	Recreational, but increasingly functional
Emergent, newly synthesised, or newly popularised drugs in collegiate populations	Marijuana, LSD, psilocybin	MDMA, cocaine, crack	Prescription stimulants, opioids, sedatives; salvia divinorum; synthetic cannabinoids and cathinones
Environment for human subject research involving recreational or controlled substances133	Open, exploratory	Prohibitive	Controlled
Examples of institutions supporting drug research on human subjects	Harvard Psychedelic & Psilocybin Insts. (psilocybin, LSD);134 UC Irvine (Dr Oscar Janiger’s LSD study)135	Very few involving controlled substances, (especially hallucinogens and drugs used recreationally by youths)	Many involving psilocybin, MDMA, salvia divinorum, etc. at institutions including Johns Hopkins University; University of Arizona; NYU, etc.136
Notable changes in US drug policy	1965–1972: Drug Abuse Control Amendments; 1973: Drug Enforcement Agency	1986: Anti Drug Abuse Act (mandatory minimums)	1995–present: state-by-state cannabis use exemptions