Uptake of a Switching Program for Patients Receiving Intravenous Infliximab and Vedolizumab to Subcutaneous Preparations.

Background: Recent trials support the clinical efficacy and safety of subcutaneous infliximab (IFX) or vedolizumab (VDZ) for Inflammatory Bowel Disease (IBD). We evaluated the uptake and rationale for choosing to switch from intravenous infusions to subcutaneous injections.

Methods: Retrospective analysis of all adult patients receiving standard dosing IFX or VDZ maintenance therapy to investigate uptake of subcutaneous injections and the rationale for switching to subcutaneous injections.

Results: Of 232 eligible patients (total = 258: IFX = 190, VDZ = 68, and no longer eligible = 26), 58% of patients on IFX and 59% of patients on VDZ chose to switch to subcutaneous treatment. Age, sex, diagnosis, drug, line of treatment, and duration of treatment were not predictors for willingness to switch. Questionnaire responses ( = 51) demonstrate that the decision to switch was not influenced by COVID-19 exposure risk, impact on wider IBD service provision, impact on patient mental health, financial savings, seeking support following a switch, or a sense of independence managing IBD. Switchers (68%) were more motivated by time savings than non-switchers (25%; = 0.0042).

Conclusions: Switch uptake rates were 58%, with 90% of patients eligible to switch. Switch decision was influenced by time savings for patients but not by other patient-related factors.