The group of inventions relates to medicine, pharmacology, namely to psychiatry and can be used for effective and safe treatment of mental disorders associated with dysfunction of dopamine and serotonin (5-hydroxytryptamine) neurotransmitter systems. Pharmaceutical compositions containing halogenated clozapine, in an amount effective as selective antagonists of D4 and 5NT2A receptors, and at least one pharmaceutically acceptable carrier, as well as their use and methods of treatment are offered for this purpose. The inventions make it possible to create a new drug with a well-balanced receptor profile, the intake of which will allow to treat mental disorders in an effective way without causing side effects associated with exposure to receptors that are not involved in the pathology of a mental disorder.
