Pharmacokinetics and safety of Intragam 10 NF, the next generation 10% liquid intravenous immunoglobulin, in patients with primary antibody deficiencies

Abstract

Intragam® 10 NF is the next generation 10% intravenous immunoglobulin with three pathogen reduction steps and a noncarbohydrate stabiliser. This open label, cross-over study in patients with primary immunodeficiency was designed to evaluate whether Intragam 10 NF differed in its pharmacokinetics (PK) compared with Intragam P and to assess Intragam 10 NF safety and tolerability. Nineteen primary immunodeficiency patients were administered one cycle of their existing Intragam P dose (0.2-0.8 g/kg 3-4 weekly), followed by seven cycles of Intragam 10 NF administered at the same dosing schedule as Intragam P. The primary objective was to compare serum immunoglobulin G (IgG) trough levels. Secondary endpoints were PK variables, safety and tolerability. There was no significant within-patient difference in the average trough immunoglobulin G concentration between Intragam P and Intragam 10 NF (8.76 g/L, 8.55 g/L respectively) (geometrical mean ratio 1.034; 95% confidence interval 0.996-1.073; P = 0.079). Mean PK parameters for both products were similar, with all 95% confidence interval encompassing 1.0 except for time to maximum concentration. Time to maximum concentration occurred earlier with Intragam 10 NF compared with Intragam P, with a shorter infusion time (mean 1.75 h vs 2.52 h respectively; P < 0.05). Headache was the most frequent treatment-related event following both products. There were no study withdrawals, deaths, or notable changes in laboratory values or vital signs. Intragam 10 NF was well tolerated and exhibited similar PK to Intragam P, with the advantage of a 45 min shorter infusion time.