Comparison of the pharmacokinetics and safety of three formulations of infliximab (CT-P13, EU-approved reference infliximab and the US-licensed reference infliximab) in healthy subjects: a randomized, double-blind, three-arm, parallel-group, single-dose, Phase I study

Objective: To compare the pharmacokinetics (PK), safety and tolerability of biosimilar infliximab (CT-P13 [Remsima (R), Inflectra (R)]) with two formulations of the reference medicinal product (RMP) (Remicade (R)) from either Europe (EU-RMP) or the USA (US-RMP). Methods: This was a double-blind, three-arm, parallel-group study (EudraCT number: 2013-003173-10). Healthy subjects received single doses (5 mg/kg) of CT-P13 (n = 71), EU-RMP (n = 71) or US-RMP (n = 71). The primary objective was to compare the PK profiles for the three formulations. Assessments of comparative safety and tolerability were secondary objectives. Results: Baseline demographics were well balanced across the three groups. Primary end points (C-max, AUC(last) and AUC(inf)) were equivalent between all formulations (CT-P13 vs EU-RMP; CT-P13 vs US-RMP; EU-RMP vs US-RMP). All other PK end points supported the high similarity of the three treatments. Tolerability profiles of the formulations were similar. Conclusion: The PK profile of CT-P13 is highly similar to EU-RMP and US-RMP. All three formulations were equally well tolerated.