TABLE 1.

Substitutions

Pretreatment (dose)	A50 DAR	n/n	A50 Rate Reduction	n/n
Cocaine	1.96 (1.46–2.64)	29/29	Not calculated	4/29
Amphetamine	0.33 (0.22–0.54)	7/7	Not calculated	3/7
U-50488	Not applicable	0/6	9.32 (6.25–13.90)	6/6
Scopolamine	0.90 (0.29–2.76)	4/8	Not calculated	3/8
Methylscopolamine	4.46 (2.95–14.15)	6/8	33.13 (20.34–53.95)	5/8

n/n indicates the number of mice showing ≥50% reduction in %DAR and ≥50% reduction in response rates, respectively, over the number of mice tested.