Table 2.

Parallel consumption (%) of the two groups.

Illegal heroin consumers (n = 74)Medical heroin consumers (n = 44)
Cocaine89.215.9
Cannabis41.959.1
Methadone41.934.1
Benzodiazepines29.722.7
Methaqualone9.59.1
Barbiturates5.42.3
Tricyclic antidepressants4.16.8
LSD4.10
Amphetamines1.40
No parallel consumption1.418.2