Analysis of Pharmacokinetic and Pharmacodynamic Interactions Between Chlorpromaz...

연구 요약

Analysis of Pharmacokinetic and Pharmacodynamic Interactions Between Chlorpromazine and Risperidone via Simultaneous Measurement of Multiple Receptor Occupancy in the Rat Brain.

Biomedicines 학술지에 발표된 이 연구는 Akashita G, Nakatani E, Tanaka S 외 연구팀이 수행하였습니다.

이 연구는 'Analysis of Pharmacokinetic and Pharmacodynamic Interactions Between Chlorpromazine and Risperidone via Simultaneous Measurement of Multiple Receptor Occupancy in the Rat Brain.'에 대한 과학적 분석을 제공합니다.

핵심 내용

Background/Objectives: Combination therapy for schizophrenia may exacerbate side effects mediated by multiple brain receptors. This study aimed to elucidate the pharmacodynamic and pharmacokinetic interactions between chlorpromazine and risperidone. We investigated dopamine 2 (D2), serotonin 2A (5-HT2A), histamine 1 (H1), and muscarinic acetylcholine (mACh) receptor occupancy in the brain as well as pharmacokinetic interactions after oral administration of chlorpromazine and risperidone in rats. Methods: Rats were orally administered chlorpromazine, risperidone, or their combination. A tracer cocktail solution was injected intravenously to measure multiple receptor occupancies simultaneously. Tracer and drug concentrations in the brain tissue and plasma were quantified by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Results: Receptor occupancy increased in a dose-dependent manner. The doses required for 70% D2 receptor occupancy were 4.5 mg/kg for chlorpromazine and 1.5 mg/kg for risperidone. Co-administration of chlorpromazine (4.5 mg/kg) and risperidone (1.5 mg/kg) resulted in an increase in D2 and 5-HT2A receptor occupancy to approximately 90%. Risperidone alone caused a transient increase in H1 receptor occupancy to 80%, while co-administration increased mACh receptor occupancy to 60%. Co-administration with chlorpromazine significantly increased the plasma concentrations of risperidone and its metabolite, paliperidone, and decreased the oral clearance of risperidone by 5.9-fold. Conclusions: Co-administration of chlorpromazine and risperidone increases the occupancy of D2, 5-HT2A, and mACh receptors in the rat brain and increases the plasma concentrations of risperidone and paliperidone, suggesting a potential risk of enhanced adverse effects due to both pharmacokinetic and pharmacodynamic interactions involving target and non-target brain receptors.

일반인을 위한 해석

구체적인 실천 사항은 담당 의사 또는 약사와 상담하시기 바랍니다.

실천 사항

• 현재 복용 중인 약물이나 영양제에 대해 궁금한 점이 있다면 담당 의사 또는 약사와 상담하시기 바랍니다
• 약물이나 영양제의 용법·용량을 임의로 변경하지 마세요
• 이상 반응이 나타나면 즉시 전문가에게 문의하세요

의사/약사의 전문적 판단을 대체하지 않습니다 (PMID: 41595654)

📄 [전문 보기 (Markdown)](fulltext/41595654-analysis-of-pharmacokinetic-and-pharmacodynamic-interactions.md)