The updated NUWIQ® PI includes data from the NuProtect study, which was the largest prospective study of a single FVIII product in true PUPs. Patients received NUWIQ® for prophylaxis or on-demand treatment and were followed for 100 exposure days or 5 years. Of the 105 PUPs assessed for inhibitor development, 17 (16.2%) developed high-titre inhibitors and 11 (10.5%) developed low-titre inhibitors, 5 of whom had transient inhibitors. Of the 28 patients who developed an inhibitor, 25 did so within 20 days of treatment exposure and no patients developed inhibitors after 34 exposure days.