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It is suggested in this paper that drug addiction is closely related to the manic-depressive illness, but not identical with it. The drug addict uses certain manic and depressive mechanisms which are reinforced and consequently altered by the drugs. The drug has both a symbolic meaning which relates to the unconscious phantasies attached to it and the drugging and also a pharmacotoxic effect which increases the omnipotence of the mechanisms used and the omnipotence of the impulses.
The use of the mechanisms of idealization, identification with ideal objects, and denial of persecutory and depressive anxieties is related to a positive or defensive aspect of mania.