They contain psychoactive substances from the cannabinol group, which act antagonistically to human cannabinoid receptors (along with tetrahydrocannabinol (THC)) and exhibit psychotropic effects.

Depending on the amount taken, cannabis presents various effects, including sedative, appetite stimulant, bronchodilator, irritant or analgesic. At present, several varieties of it are known are: Cannabis sativa and its subspecies indica and Cannabis ruderalis. The use of cannabis can be very dangerous to the health and life of the patient.