A model‐based approach to characterize the population pharmacokinetics and the relationship between the pharmacokinetic and safety profiles of RBP‐7000, a new, long‐acting, sustained‐released formulation of risperidone
Abstract
RBP‐7000 is a sustained‐release (once‐monthly injection for subcutaneous administration) formulation of risperidone using the ATRIGEL® Delivery System, developed for treatment of schizophrenia to address compliance issues associated with oral administration. The objective of this analysis was to report the results of a population pharmacokinetic analysis and to describe the relationship between risperidone and 9‐hydroxyrisperidone levels with dopamine (DA) D2‐receptor occupancy, prolactin levels, and adverse events using data collected in 45 clinically stable schizophrenic patients receiving RBP‐7000 in single ascending doses (risperidone) of 60, 90, and 120 mg. The population PK model accounted for an initial peak, a delayed and slow delivery, the disposition of risperidone, and the conversion of risperidone to 9‐hydroxyrisperidone. BMI was a covariate affecting absorption of risperidone and ultimately formation of 9‐hydroxyrisperidone. A logistic analysis indicated a correlation between the increase in Active Moiety (risperidone + 9‐OH‐risperidone) exposure (C max) and the probability of observing GI disorders. An E max population PK/prolactin model best described the relationship between the circulating Active Moiety and the serum prolactin levels. Gender was a significant covariate associated with E max. These data provided a comprehensive characterization of the relationship between circulating Active Moiety and the efficacy/safety profile of RBP‐7000 in clinically stable schizophrenic patients.
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RLAI-polymer uses the biodegradable polymer ATRIGEL® delivery system, whereby risperidone is dissolved and suspended in a polymer that solidifies upon contact with tissue fluids.
“This formulation of risperidone uses the biodegradable polymer ATRIGEL® delivery system, whereby risperidone is dissolved and suspended in a polymer that solidifies upon contact with tissue fluids [92].”
From Pharmacokinetic Characteristics of Long-Acting Injectable Antipsychotics for Schizophrenia: An Overview (2021) · cites this paper as [92]
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- Authors
- Gomeni, R., Heidbreder, C., Fudala, P. J., & Nasser, A. F.
- Affiliations
- Alleantis Research Triangle Park North Carolina
- Reckitt Benckiser (United States) (US)
- Venue
- The Journal of Clinical Pharmacology
- Publisher
- Wiley
- Published
- 2013-07-19
- Volume
- 53
- Issue
- 10
- Pages
- 1010-1019
- ISSN
- 0021-9754 (ISSN-L)
- 0091-2700
- 1552-4604
- OpenAlex
- W1598068766
- Cited by
- 38
- References
- 18
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 5 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 6 · 2016: 5 · 2015: 1 · 2014: 3 · 2013: 1
- FWCI
- 2.36
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Clinical Pharmacology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Pharmaceutical studies and practices
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
- Keywords
- risperidone, population pharmacokinetics, paliperidone, dopamine D2 receptor occupancy, prolactin, antipsychotic adverse effects, gastrointestinal diseases, Emax model, body mass index, schizophrenia
- MeSH terms
- Paliperidone Palmitate, Adolescent, Adult, Delayed-Action Preparations, Female, Humans, Injections, Subcutaneous, Isoxazoles, Male, Middle Aged, Models, Biological, Polyglactin 910, Prolactin, Pyrimidines, Schizophrenia, Antipsychotic Agents, Receptors, Dopamine D2, Risperidone, Cytochrome P-450 CYP2D6, Young Adult
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