“…In humans, this has been termed "neuroleptic-induced supersensitivity psychosis" (Chouinard et al, 1978;Chouinard and Jones, 1980), and has been observed after withdrawal from antipsychotic drugs such as quetiapine (Margolese et al, 2002), clozapine (Ekblom et al, 1984;Tollefson et al, 1999), olanzapine (Llorca et al, 2001), haloperidol (Kahne, 1989), and fluphenazine enanthate (Chouinard and Jones, 1980). In keeping with the clinical observations, animal studies show that withdrawal from antipsychotic treatment reveals an increased psychomotor response to apomorphine (Asper et al, 1973;Gianutsos et al, 1974;Sayers et al, 1975;Davis, 1975, 1976;Clow et al, 1979;Montanaro et al, 1982), amphetamine (Smith and Davis, 1975;Rebec et al, 1982;Meng et al, 1998), and dopamine injected into the caudate-putamen or nucleus accumbens (Halperin et al, 1983). Although such studies have conclusively demonstrated dopamine supersensitivity after withdrawal from an antipsychotic, much less is known about what happens during ongoing treatment.…”