Psychoactive substances act on the central nervous system producing mental and behavioral changes leading to clinical manifestations associated with drug abuse. Objective: To evaluate the motor ability and attention span among individuals dependent on psychotropic drugs, who were in treatment in a psychiatric hospital. Method: A single case study, whose unit of analysis was a hospital, assessed the motor skills and attention span of 10 male individuals addicted to illicit psychotropic drugs, with mean age of 31.9 ± 7.07 years and average hospitalization of 23.9 days. The following instruments were used: a structured socio-demographic interview, the Motor Scale for Elderly (EMTI) adapted, and the Trail Making Test (TMT A and B). The average age at first consumption was 15.1 years; and there was a slower performance in the TMT A and B in all age groups. In general motor ability, individuals were classified as follows: two "superior", two "above average", five "average", and one "below average". Results: Their temporal organization was the variable with the lowest performance. Conclusion: Attention deficits were encountered along with average general motor ability and a strong negative association or correlation between motor performance and attention span.