Table 2.

Age of Initiation via any Mode of Administration and Lifetime Misuse (n=50)

Substance	Mean Age of Initiation (s.d.)	Total n (%)
Marijuana	12.5 (2.8)	50 (100%)
Alcohol	12.8 (2.6)	50 (100%)
Stimulants§	14.1 (3.2)	41 (82%)
Opioids†	14.5 (2.9)	50 (100%)
Cocaine	15.4 (2.7)	49 (98%)
Tranquilizers‡	15.6 (2.9)	46 (92%)
Mushrooms	15.7 (2.6)	47 (94%)
GHB	15.9 (3.4)	18 (36%)
Muscle Relaxants	15.9 (3.0)	29 (58%)
Over-the-Counter	16.0 (3.7)	34 (68%)
LSD	16.3 (2.3)	45 (90%)
Methamphetamine	16.6 (3.2)	41 (82%)
Heroin	16.6 (3.3)	50 (100%)
Ecstasy	17.0 (2.7)	48 (96%)
Ketamine	17.1 (2.2)	36 (72%)
PCP	17.3 (2.8)	30 (60%)
Crack	17.6 (2.5)	43 (86%)
Sleeping Pills	17.9 (3.4)	21 (42%)

^†Includes Vicodin, Codine, Oxycontin, Morphine and similar medications.

^‡Includes Xanax, Valium, Klonopin, and similar medications.

^§Includes Ritalin, Adderall and Desoxyn.