Columbia subject headings:
Drug abuse--Research.
Drug interactions--Research.
Neuropsychopharmacology--Research.
Psychotropic drugs--Research.
Harvard subject headings:
Drug abuse--Research.
Drug interactions--Research.
Drugs of abuse--Research.
Neuropsychopharmacology--Research.
Princeton subject headings:
Drug abuse--Research.
Drug interactions--Research.
Drugs of abuse--Research.
Neuropsychopharmacology--Research.