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Treatment of Patients with Recently Exacerbated Schizophrenia with Paliperidone Palmitate: A Pilot Study of Efficacy and Tolerability

Authors Gattaz WF, Saracco-Alvarez R, Daltio CS, Van de Bilt MT, Ortegón JJ, Villaseñor-Bayardo SJ, Louzã M, Elkis H, Soares B, Cabrera Jaramillo P, Lawson F, Díaz-Galvis L

Received 8 October 2019

Accepted for publication 4 August 2020

Published 10 September 2020 Volume 2020:16 Pages 2063—2072


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Roger Pinder

Wagner F Gattaz,1 Ricardo Saracco-Alvarez,2 Claudiane Salles Daltio,3 Martinus T Van de Bilt,1 Jose Julian Ortegón,4 Sergio J Villaseñor-Bayardo,5 Mario Louzã,6 Helio Elkis,6 Bernardo Soares,7 Patricia Cabrera Jaramillo,7 Fabio Lawson,7 Leonardo Díaz-Galvis8

1Laboratory of Neuroscience (LIM27), Instituto de Psiquiatria do Hospital das Clinicas da Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil; 2Instituto Nacional de Psiquiatría Ramón de la Fuentel, México D.F., México; 3Proesq - Unifesp Schizophrenia Program - Federal University of São Paulo, São Paulo, Brazil; 4Centro de Investigaciones del Sistema Nervioso, Grupo Cisne, Bogotá, Colombia; 5University of Guadalajara, Mexico, Hospital Civil de Guadalajara, “Fray Antonio Alcalde”, Guadalajara, Mexico; 6Instituto de Psiquiatria do HCFMUSP, São Paulo, Brazil; 7Medical Affairs, Janssen, Brazil; 8Medical Affairs, Janssen Canada, Toronto, ON, Canada

Correspondence: Leonardo Díaz-Galvis
Department of Medical Affairs, Janssen Inc, 19 Green Belt Dr, Toronto, ON M3C 1L9, Canada
Tel +1 416 382 5020

Background: Paliperidone palmitate is a long-acting, second-generation antipsychotic (SGA) indicated for the treatment of acute exacerbations and maintenance treatment of adults with schizophrenia. This study addressed the response to paliperidone palmitate in Latin American patients with acute symptoms and recently diagnosed schizophrenia.
Objective: Explore the efficacy and tolerability of paliperidone palmitate administered once a month for 4 months in patients with acute phase and recent diagnosis (within 1– 6 years) of schizophrenia in 3 Latin American countries.
Methods: This was a non-randomized, open-label, multicenter study with paliperidone palmitate injected intramuscularly in the deltoid muscle at an initial loading dose of 150 mg eq. (234 mg) on day 1 and 100 mg eq. (156 mg) on day 8 (± 4 days). The recommended maintenance dose was 75 mg eq. (117 mg) from day 36 to day 92. Efficacy was evaluated with PANSS and CGI-S. The last observation carried forward (LOCF) was used for efficacy analysis for imputation of missing data; no adjustments were made for multiplicity. Adverse events were evaluated during treatment.
Results: The patient retention rate was 84.0% (144 patients received study drug; 121 finished the study). The percentage of patients with a reduction of at least 30% in PANSS total score compared to baseline gradually increased during the study, and at the end, 78.4% of patients showed response. The PANSS total score and CGI-S scores decreased significantly from baseline to LOCF endpoint (P < 0.0001 for both); significant reduction in PANSS total score was observed at day 8 and persisted to the end of the study. Most common adverse events were muscle rigidity (11.8%), akathisia (11.1%), injection-site pain (7.6%), weight gain (7.6%), and insomnia (7.6%).
Conclusion: Paliperidone palmitate was efficacious in Latin American patients studied with an acute exacerbation and recent diagnosis of schizophrenia, and no new safety signals were identified.

Keywords: paliperidone palmitate, recent onset, acute phase, schizophrenia

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