Initiation of quarterly palmitate paliperidone in French clinical practice: Results from the observational, cross-sectional OPTIMUS study.

Purpose: Long-term antipsychotic treatment is key to a positive clinical outcome in schizophrenia. Recent guidelines recommend the prescription of long-acting antipsychotic formulations (LAIs) as early as the first episode in patients with schizophrenia. The OPTIMUS study evaluated real-world use of a new three-monthly paliperidone palmitate formulation (PP3M) in France.

Methods: For this observational cross-sectional study, all French psychiatrists were invited to enrol patients who had initiated PP3M in the previous 4 months. Snapshot data were collected at a routine consultation, without any modification of clinical practice.

Results: This population of 350 patients with schizophrenia started on PP3M predominantly included single men, living independently with a diagnosis of schizophrenia for a median of 9.3 years. Demographic characteristics were broadly comparable to those reported in other studies on LAIs. Investigators cited treatment simplification (96.9%) and patient comfort (93.3%) as the most common reasons for switching to PP3M; enhancing adherence was mentioned less often (61.1%) with most patients previously considered as adherent, and a majority of them expressing a positive attitude to their treatment. One-third of patients accepted the psychiatrist's proposal to initiate PP3M treatment without any discussion, and relatives were involved in the therapeutic decision-making process in only 23.7% of cases. After initiation, few changes were seen in professional follow-up frequency or concomitant pharmacological and non-pharmacological treatment modalities except for a decrease in antipsychotic polytherapy.

Conclusions: PP3M is mostly prescribed in adherent patients with fairly stable schizophrenia, and the longer dosing interval does not substantially affect patient care.