Ethnopsychopharmacology is the pharmacology area that studies the effect of psychoactive drugs on patients having different ethnic characteristics. Some important factors in the management of these patients are the differences in enzymatic characteristics, cultural practices in relation with medicine and food, and the biases of medical professionals in their relationship with patients from different ethnic group (which is called <<cross-cultural transference>>). At present, when immigration has become an important issue in our country, some basic knowledge on this subject seems compulsory.