A drug interaction is a modification of the effect of one drug by another. This interaction can be beneficial or harmful, or has no discernible effect. Common psychotropic drug interactions include pharmacokinetic, pharmacokinetic, and pharmacodynamic interactions.

Narcotic substances, psychotropic drugs need to be differentiated 2 to be effective in treating disease and avoid danger to the patient. In any case, the patient should also use the drug prescribed by the doctor.