Effects of non-medical infliximab biosimilar switching in ocular inflammatory diseases: A case series from a tertiary care center

To describe the course of care and outcomes for 3 uveitis patients formerly on Remicade that were non-medically switched to Inflectra.Retrospective observational case series.•Setting: Tertiary care clinical practice.•Patient population: 3 Uveitis patients, observing both eyes for inflammation as applicable. Patients included if they had been on Inflectra for ≥2 infusions and history of Remicade use. Patients described herein had at least 1 adverse reaction to Inflectra and were switched to Remicade for medical necessity. Patients excluded if they were lost to follow-up or not examined for over 6 months during therapy.•Observation procedures/Interventions: Patients observed for adverse changes in clinical course while on Inflectra. Patients developing these changes on Inflectra were started or restarted on Remicade.The 3 patients described herein developed adverse complications while on Inflectra that required switching to Remicade. They were originally on Remicade, and their clinical course worsened beyond what had been controlled with Remicade alone. Our findings are limited by our small sample size, and further investigation is necessary to explore the scope of effects of non-medical biosimilar switching.Non-medical biosimilar switching from Remicade to Inflectra may induce detrimental side-effects and significant worsening of inflammation in patients with uveitis. Non-medical biosimilar switching from Remicade to Inflectra should be discouraged, and physician input should be sought in establishing an effective and medically-necessary treatment plan for patients with uveitis.