Luye Pharma Group (“Luye Pharma”), a pharmaceutical company committed to advancing innovative therapies for patients with diseases of the central nervous system, announced a study entitled “Population pharmacokinetics and dosing simulations for paliperidone palmitate 351 mg as alternative maintenance dose in patients with schizophrenia or schizoaffective disorder” published in The Journal of Clinical Psychiatry. The study suggested that paliperidone palmitate, brand name ERZOFRI®, an atypical antipsychotic, once-monthly long-acting injectable (LAI), may offer an alternative maintenance dose treatment option across different dosing intervals for adults with schizophrenia or schizoaffective disorder.
“Medication adherence is a persistent challenge in schizophrenia care, and long-acting injectables can play an important role in supporting continuity of treatment for patients,” said Leslie Citrome, M.D., M.P.H., Clinical Professor of Psychiatry and Behavioral Sciences at New York Medical College and study co-author. “Our findings suggest that the 351 mg dose of paliperidone palmitate may offer clinically meaningful flexibility as an alternative maintenance dose, with the potential to support less frequent dosing approaches while maintaining paliperidone exposure comparable to established regimens.”
The study analysis simulated paliperidone exposure associated with alternative maintenance dosing regimens of ERZOFRI®, which received U.S. Food and Drug Administration approval in 2024 for the treatment of schizophrenia and schizoaffective disorder in adults. ERZOFRI® became available in the United States in April 2025, and is initiated with a single 351 mg injection, followed by recommended monthly maintenance doses up to 234 mg.
The analysis suggests that paliperidone palmitate (351 mg) at different dosing intervals may offer additional treatment options for clinical use. Currently, there are no clinical data to support the alternative dosing regimens.
About the Study
The study’s objective was to investigate steady-state paliperidone exposure following administration of 351 mg as a maintenance dose at different dosing intervals using population pharmacokinetic (popPK) analysis.
Using popPK modeling and simulation methods based on data from two Phase 1 clinical studies, the analysis evaluated the potential use of the 351 mg dose of paliperidone palmitate (ERZOFRI®) as an alternative maintenance regimen and demonstrated that administration of 351 mg every four weeks produced steady-state paliperidone exposure comparable to that of 234 mg paliperidone palmitate administered every three weeks. The analysis also showed that 351 mg administered every six weeks provided similar exposure to 234 mg administered every four weeks at steady state.
“In clinical practice, patients require individualized approaches when response to standard maintenance dosing is insufficient,” said Jonathan Meyer, M.D., Voluntary Clinical Professor of Psychiatry at the University of California San Diego and study co-author. “By evaluating exposure across different dosing intervals, the data provide a basis for maintenance strategies that may better align with individual patient needs.”
ERZOFRI® is a LAI with the highest available initiation dose of paliperidone palmitate to simplify treatment initiation for schizophrenia or schizoaffective disorder.1 Schizophrenia is a chronic and severe psychiatric disorder that affects approximately 23 million people worldwide.2
“At Luye Pharma, we are committed to advancing research that helps address the evolving needs of individuals living with schizophrenia and schizoaffective disorder, including the evaluation of treatment approaches that may improve adherence, support individualized care, and expand treatment options,” said Rongbing Yang, Executive Director of Luye Pharma Group. “As we continue to expand the clinical evidence, we remain focused on advancing innovative solutions that improve long-term disease management and patient outcomes.”
About Luye Pharma Group
Luye Pharma Group is an international pharmaceutical company dedicated to developing, manufacturing, and selling innovative medications. With R&D centers in China, the U.S., and Europe, the company is an international leader in novel drug delivery systems such as microspheres, liposomes, and transdermal patches. Luye Pharma also has multiple innovative products in two categories: new chemical entities and antibodies.
To date, the company has launched approximately 50 products in oncology, central nervous system, cardiovascular, and other therapeutic areas. It conducts business in over 80 countries and regions, including major pharmaceutical markets such as China, the U.S., Europe, and Japan, as well as fast-growing emerging markets.
ABOUT ERZOFRI®
What is ERZOFRI (paliperidone palmitate) extended-release injectable suspension?
ERZOFRI is an atypical antipsychotic indicated for:
- The treatment of schizophrenia in adults.
- The treatment of schizoaffective disorder in adults as monotherapy and as an adjunct to mood stabilizers or antidepressants.
IMPORTANT SAFETY INFORMATION FOR ERZOFRI
WARNING: INCREASED MORTALITY IN ELDERLY PATIENTS WITH DEMENTIA-RELATED PSYCHOSIS
Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. ERZOFRI is not approved for use in patients with dementia-related psychosis.
CONTRAINDICATIONS: ERZOFRI is contraindicated in patients with a known hypersensitivity to either paliperidone or risperidone, or to any of the excipients in the ERZOFRI formulation. Hypersensitivity reactions, including anaphylactic reactions and angioedema, have been reported in patients treated with risperidone and in patients treated with paliperidone.
WARNINGS AND PRECAUTIONS
Cerebrovascular Adverse Reactions: In clinical trials in elderly patients with dementia-related psychosis, increased risk of cerebrovascular adverse reactions (cerebrovascular accidents and transient ischemic attacks), including fatalities, have been reported in patients taking atypical antipsychotic medications compared to placebo. ERZOFRI is not approved for the treatment of patients with dementia-related psychosis.
Neuroleptic Malignant Syndrome (NMS): NMS, a potentially fatal symptom complex, has been reported in association with antipsychotic drugs. Manage with immediate discontinuation and close monitoring.
QT Prolongation: Paliperidone causes a modest increase in the corrected QT (QTc) interval. The use of paliperidone should be avoided in combination with other drugs that are known to prolong QTc. Paliperidone should also be avoided in patients with congenital long QT syndrome and in patients with a history of cardiac arrhythmias.
Tardive Dyskinesia (TD): TD, a syndrome consisting of potentially irreversible, involuntary, dyskinetic movements, may develop in patients treated with antipsychotic drugs. Although the prevalence of the syndrome appears to be highest among the elderly, especially elderly women, it is impossible to predict which patients will develop the syndrome. Whether antipsychotic drug products differ in their potential to cause TD is unknown.
The risk of developing TD and the likelihood that it will become irreversible appear to increase with the duration of treatment and the cumulative dose. The syndrome can develop after relatively brief treatment periods, even at low doses. It may also occur after discontinuation of treatment. TD may remit, partially or completely, if antipsychotic treatment is discontinued. Antipsychotic treatment itself may suppress (or partially suppress) the signs and symptoms of the syndrome and may thus mask the underlying process. The effect that symptomatic suppression has upon the long-term course of the syndrome is unknown.
If signs and symptoms of TD appear in a patient treated with ERZOFRI, drug discontinuation should be considered. However, some patients may require treatment with ERZOFRI despite the presence of the syndrome.
Metabolic Changes: Atypical antipsychotic drugs have been associated with metabolic changes, including hyperglycemia, dyslipidemia, and body weight gain.
- Hyperglycemia and Diabetes Mellitus: Hyperglycemia and diabetes mellitus, in some cases extreme and associated with ketoacidosis or hyperosmolar coma or death, have been reported in patients treated with all atypical antipsychotics. Patients with an established diagnosis of diabetes mellitus who are started on atypical antipsychotics should be monitored regularly for worsening glucose control. Patients with risk factors for diabetes mellitus who are starting treatment with atypical antipsychotics, including ERZOFRI, should undergo fasting blood glucose testing at the beginning of treatment and periodically during treatment. Any patient treated with atypical antipsychotics should be monitored for symptoms of hyperglycemia including polydipsia, polyuria, polyphagia, and weakness. Patients who develop symptoms of hyperglycemia during treatment with atypical antipsychotics should undergo fasting blood glucose testing. In some cases, hyperglycemia resolved when the atypical antipsychotic was discontinued; however, some patients required continuation of anti-diabetic treatment despite discontinuation of the suspect drug.
- Dyslipidemia: Undesirable alterations in lipids have been observed in patients treated with atypical antipsychotics.
- Weight Gain: Weight gain has been observed with atypical antipsychotic use. Monitoring weight is recommended.
Orthostatic Hypotension and Syncope: Paliperidone can induce orthostatic hypotension and syncope in some patients. Use ERZOFRI with caution in patients with known cardiovascular disease (e.g., heart failure, history of myocardial infarction or ischemia, conduction abnormalities), cerebrovascular disease, or conditions that predispose the patient to hypotension. Monitoring of orthostatic vital signs should be considered in patients who are vulnerable to hypotension.
Falls: Somnolence, postural hypotension, motor and sensory instability have been reported with the use of antipsychotics, including paliperidone palmitate, which may lead to falls and, consequently, fractures or other fall-related injuries. For patients, particularly the elderly, with diseases, conditions, or medications that could exacerbate these effects, assess the risk of falls when initiating antipsychotic treatment and recurrently for patients on long-term antipsychotic therapy.
Leukopenia, Neutropenia, and Agranulocytosis: Events of leukopenia, neutropenia, and agranulocytosis have been reported temporally related to antipsychotic agents. Patients with a history of a clinically significant low white blood cell count (WBC)/absolute neutrophil count (ANC) or past drug-induced leukopenia/neutropenia should have their complete blood count (CBC) monitored frequently during the first few months of therapy. Discontinuation of ERZOFRI should be considered at the first sign of a clinically significant decline in WBC in the absence of other causative factors.
Monitor patients with clinically significant neutropenia for fever or other symptoms or signs of infection and treat promptly if such symptoms or signs occur. Discontinue ERZOFRI in patients with absolute neutrophil count <1000/mm3 and follow their WBC until recovery.
Hyperprolactinemia: Like other drugs that antagonize dopamine D2 receptors, paliperidone elevates prolactin levels and the elevation persists during chronic administration. Paliperidone has a prolactin-elevating effect similar to that seen with risperidone, a drug that is associated with higher levels of prolactin than other antipsychotic drugs. Long-standing hyperprolactinemia, when associated with hypogonadism, can lead to decreased bone density in males and females.
Potential for Cognitive and Motor Impairment: Antipsychotics, including ERZOFRI, have the potential to impair judgement, thinking, and motor skills. Patients should be cautioned about performing activities requiring mental alertness, such as operating hazardous machinery or operating a motor vehicle, until they are reasonably certain that paliperidone therapy does not adversely affect them.
Seizures: ERZOFRI should be used cautiously in patients with a history of seizures or with conditions that potentially lower the seizure threshold.
Dysphagia: Esophageal dysmotility and aspiration have been associated with antipsychotic drug use. Antipsychotic drugs, including ERZOFRI, should be used cautiously in patients at risk for aspiration.
Priapism: Priapism has been reported with oral paliperidone during postmarketing surveillance. Severe priapism may require surgical intervention.
Disruption of Body Temperature Regulation: Disruption of the body’s ability to reduce core body temperature has been attributed to antipsychotic agents. Appropriate care is advised when prescribing ERZOFRI to patients who will be experiencing conditions which may contribute to an elevation in core body temperature, such as exercising strenuously, exposure to extreme heat, receiving anticholinergic medications, or dehydration.
ADVERSE REACTIONS
The most common adverse reactions (incidence ≥ 5% and occurring at least twice as often as placebo) were injection site reactions, somnolence/sedation, dizziness, akathisia, and extrapyramidal disorder.
DRUG INTERACTIONS
An additive effect may occur when co-administered ERZOFRI with drugs that may cause orthostatic hypotension.
Avoid using a strong inducer of CYP3A4 and/or P-glycoprotein (P-gp) during a dosing interval for ERZOFRI. If concomitant use is necessary, consider using paliperidone extended-release tablets.
USE IN SPECIFIC POPULATIONS
Pregnancy: May cause extrapyramidal and/or withdrawal symptoms in neonates with third trimester exposure. There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to atypical antipsychotics, including ERZOFRI, during pregnancy. Healthcare providers are encouraged to register patients by contacting the National Pregnancy Registry for Atypical Antipsychotics at 1-866-961-2388 or online at http://womensmentalhealth.org/clinicaland-research-programs/pregnancyregistry/.
Lactation: Infants exposed to ERZOFRI through breastmilk should be monitored for excess sedation, failure to thrive, jitteriness, and extrapyramidal symptoms (tremors and abnormal muscle movements).
Fertility: Based on the pharmacologic action of paliperidone (D2 receptor antagonism), treatment with ERZOFRI may result in an increase in serum prolactin levels, which may lead to a reversible reduction in fertility in females of reproductive potential.
Pediatric Use: Safety and effectiveness of ERZOFRI in pediatric patients have not been established.
Please see full Prescribing Information at https://www.luye.cn/lvye_en/erzofri.pdf, including BOXED WARNING, for ERZOFRI.
References
- ERZOFRI®. https://ErzofriHCP.com/. Accessed June 10, 2026.
- World Health Organization, Schizophrenia. https://www.who.int/news-room/fact-sheets/detail/schizophrenia. Accessed June 10, 2026.
©2026 Luye Pharma Group Ltd. All rights reserved. US-ERZ-PM-260700004-v1.0-09/2026
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