Table 1. Drug Use History.

	MDMA (N=20)					Non-MDMA (N=20)
	N	Minimum	Maximum	Mean (SD)	Abstinence (days), mean (SD)	N	Minimum	Maximum	Mean (SD)	Abstinence (days), mean (SD)
MDMA
Episodes	20	3	155	33.25 (37.79)	479.95 (580.65)	0
Milligrams		300	10 000	2692.38 (2712.01)
Alcohola
Episodes	17	23	3851	653.85 (979.40)	14.85 (8.41)	19	4	2620	659.37 (888.48)	36 (57.23)
Units		91	23 754	3481.66 (6289.04)			4	11 567	2281.71 (3355.99)
Cannabis
Episodes	16	9	2000	644.76 (727.62)	142.65 (339.71)	15	0	1599	124.03 (352.78)	217.87 (244.69)
Joints		9	4000	854.66 (1161.18)			0	1063	81 (234.64)
Cocaine
Episodes	17	0	40	9.65 (11.24)	449.82 (587.71)	0
Grams		0	46	6.16 (10.55)
METH
Episodes	7	0	166	19.65 (45.23)	1092.33 (1482.18)	0
Milligrams		0	8110	850.51 (2073.08)
Sedatives
Episodes	12	0	80	18.40 (26.84)		2	0	10	0.80 (2.55)	509.00 (577.00)
Milligrams		0	800	177.75 (368.29)			0	100	8.00 (25.46)
LSD
Episodes	16	0	148	18.20 (33.71)	982.93 (692.81)	1	0	15	0.75 (3.35)	3173 (—)
Milligrams		0	19 940	3243.75 (5458.40)			0	1800	90.00 (402.49)
Psilocybin
Episodes	15	0	25	6.80 (6.89)	573.92 (671.04)	4	0	6	0.60 (1.57)	1114.75 (1660.75)
Grams		0	100	20.58 (27.17)			0	12	1.11 (3.14)
Codeine
Episodes	10	0	20	3.30 (5.61)	510.78 (452.22)	1	0	30	1.5 (6.71)	1860 (—)
Milligrams		0	800	120.55 (211.82)			0	300	15 (67.08)
Opium
Episodes	13	0	106	10.20 (23.22)	881.42 (1028.04)	0
Milligrams		0	20 000	1305.15 (4438.52)

^aAlcohol units: 1 unit=8 oz beer=1 glass wine=1 mixed drink.