The treatment schedule for neuroleptic therapy is of relevance when evaluating the development of side-effects. Seventy-five rats were treated discontinuously or continuously with the predominantly dopamine D2 receptor blocker haloperidol or the combined dopamine D1/D2 receptor blocker zuclopenthixol for 15 weeks. During and after treatment, a broad spectrum of behavioural parameters including vacuous chewing movements and tongue protrusions were observed. Discontinuous neuroleptic treatment as opposed to continuous neuroleptic treatment produced a significant long-lasting increase in oral activity. The changes were most pronounced in haloperidol-treated rats. The differences observed may have methodological implications for animal models of neuroleptic-induced movement disorders. Our findings are consistent with the hypothesis that pharmacological sensitization to the dyskinetic side-effects of neuroleptics develops when the drug effect is allowed to wear off between repeated administrations.
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http://dx.doi.org/10.1016/0014-2999(90)94191-y | DOI Listing |
Background: Antibiomania is the manifestation of manic symptoms secondary to taking an antibiotic, which is a rare side effect. In these cases, the antibiotics most often incriminated are macrolides and quinolones, but to our knowledge, there are no published cases of antibiomania secondary to cotrimoxazole. Furthermore, we also provide an update of pharmacovigilance data concerning antibiomania through a search of the World Health Organization (WHO) database.
View Article and Find Full Text PDFBMC Psychiatry
January 2025
Department of Psychiatry, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, Kanagawa, 236-0004, Japan.
Background: Paliperidone is a second-generation antipsychotic and the main active metabolite of risperidone, formulated to provide consistent therapeutic effects through an extended-release system, designed to provide consistent therapeutic effects through an extended-release formulation. While commonly used in clinical practice, switching from risperidone to paliperidone, particularly during valproate therapy, can pose challenges due to potential pharmacokinetic interactions that may increase the risk of extrapyramidal symptoms (EPS). Despite clinical observations suggesting these interactions, case reports documenting such adverse effects are scarce.
View Article and Find Full Text PDFNeuropsychopharmacol Rep
March 2025
Department of Neurology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
Aim: We aimed to create a rat model of drug-induced parkinsonism and tardive dyskinesia by chronic administration of haloperidol and examine the expression of direct and indirect pathway markers in the striatum of the model rats.
Methods: We treated 21 rats, 14 with haloperidol decanoate and 7 with placebo. The number of vacuous chewing movements per 2 min was counted, and haloperidol-treated rats were classified into two groups: mild and severe tardive dyskinesia.
Sci Rep
January 2025
Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706, Santiago de Compostela, Spain.
Aripiprazole (ARI) is an atypical antipsychotic which is a substrate of P-glycoprotein (P-gp), a transmembrane glycoprotein that plays a crucial role in eliminating potentially harmful compounds from the organism. ARI once-monthly (AOM) is a long-acting injectable form which improves treatment compliance. Genetic polymorphisms in ABCB1 may lead to changes in P-gp function, leading to individual differences in drug disposition.
View Article and Find Full Text PDFNeurochem Res
January 2025
Department of Pharmacology, Central University of Punjab, Ghudda, Bhatinda, Punjab, 151401, India.
Antipsychotic medications are used to treat a psychological condition called 'Schizophrenia'. However, its long-term administration causes irregular involuntary motor movements, targeting the orofacial regions. Glycyrrhizic acid (GA) is a naturally occurring triterpene saponin glycoside obtained from the roots of the Glycyrrhiza glabra (liquorice) plant and well known for its antioxidant, antiapoptotic and neuroprotective abilities.
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