Budget impact analysis of the subcutaneous infliximab (CT-P13 SC) for treating inflammatory bowel disease in the Big-5 European (E5) countries

Switching from intravenous to subcutaneous infliximab maintenance therapy in inflammatory bowel disease: Post hoc longitudinal analysis of a randomized trial

BACKGROUND

Pharmacokinetic non-inferiority of subcutaneous (SC) to intravenous (IV) CT-P13 maintenance therapy was demonstrated in a randomized trial (NCT02883452). This post hoc analysis evaluated longitudinal clinical outcomes with the two infliximab treatment strategies.

METHODS

Patients with Crohn's disease or ulcerative colitis received CT‑P13 IV loading doses (5 mg/kg; Week [W] 0 and W2) before randomization (1:1) to receive CT-P13 SC (body weight-based dosing every 2 weeks [Q2W]; W6-54; 'SC maintenance group') or CT‑P13 IV (5 mg/kg Q8W; W6-22) then CT-P13 SC (Q2W; W30-54; 'IV-to-SC switch group'). Paired W30/W54 patient-level data were analyzed.

RESULTS

Fifty-three (IV-to-SC switch) and fifty-nine (SC maintenance) patients were analyzed. Median trough serum CT-P13 concentrations were significantly higher at W54 versus W30 in the IV-to-SC switch group (20.4 versus 2.3 µg/mL; p < 0.00001), while remaining consistent in the SC maintenance group. Statistically significant improvements in pharmacokinetics, efficacy, fecal calprotectin levels, and quality of life were seen following switch to SC administration at W30 in the IV-to-SC switch group; safety findings were similar pre- and post-switch.

CONCLUSION

Formulation switching from IV to SC infliximab maintenance therapy was well tolerated and may provide additional clinical improvements. Findings require confirmation in larger prospective studies.

Benefits of Biosimilars in the Management of Patients with Inflammatory Bowel Disease: An International Survey

Background/Objectives: The development of biosimilar drugs has revolutionized the management of patients with inflammatory bowel diseases (IBD), significantly reducing healthcare costs. However, the impact of biosimilar availability on patient care is unknown. We conducted a survey to investigate the benefits of using biosimilars in patients with IBD. Methods: Physicians involved in the IBD care were invited to participate in an anonymous online survey. The questionnaire consisted of 42 questions addressing availability, cost, recommendations, and positioning regarding the use of biosimilars. Results: A total of 233 physicians (88.4% gastroenterologists) from 63 countries worldwide participated in the survey. Most respondents had >10 years of practice (202/233, 85.9%). Biosimilars were available in almost all cases (221, 94.8%), and over two-thirds of respondents had more than one biosimilar of adalimumab or infliximab on hospital formulary. In most cases, adalimumab and infliximab biosimilars had a reduced cost of at least 30% compared to the originators. The savings resulting from the use of biosimilars allowed physicians to improve patient care (3/233, 1.3%) or to improve research (2/233, 0.8%) in only a few cases. Interestingly, for about 50% of respondents, the cost of biologics was a limitation for patient access to therapy. For the majority of participants, the availability of biosimilars did not influence treatment decisions in Crohn's disease (70/165, 42.4%) and ulcerative colitis (83/165, 50.3%). Conclusions: The reduced cost of biosimilars compared to reference products is the main driver of choice in IBD. The impact of biosimilars of ustekinumab and vedolizumab in improving access to therapies and changing the treatment algorithm remains to be defined.

Subcutaneous Infliximab (CT-P13) as Maintenance Therapy for Inflammatory Bowel Disease: 2 Randomized Phase 3 Trials

BACKGROUND & AIMS

CT-P13 subcutaneous (SC), an SC formulation of the intravenous (IV) infliximab biosimilar CT-P13 IV, creates a unique exposure profile. We aimed to demonstrate superiority of CT-P13 SC vs placebo as maintenance therapy in patients with Crohn's disease (CD) and ulcerative colitis (UC).

METHODS

Two randomized, placebo-controlled, double-blind studies were conducted in patients with moderately to severely active CD or UC and inadequate response or intolerance to corticosteroids and immunomodulators. All patients received open-label CT-P13 IV 5 mg/kg at weeks 0, 2, and 6. At week 10, clinical responders were randomized (2:1) to CT-P13 SC 120 mg or placebo every 2 weeks until week 54 (maintenance phase) using prefilled syringes. Co-primary end points were clinical remission and endoscopic response (CD) and clinical remission (UC) at week 54 (all-randomized population).

RESULTS

Overall, 396 patients with CD and 548 patients with UC received induction treatment. At week 54 in the CD study, statistically significant higher proportions of CT-P13 SC-treated patients vs placebo-treated patients achieved clinical remission (62.3% vs 32.1%; P < .0001) and endoscopic response (51.1% vs 17.9%; P < .0001). In the UC study, clinical remission rates at week 54 were statistically significantly higher with CT-P13 SC vs placebo (43.2% vs 20.8%; P < .0001). Achievement of key secondary end points was significantly higher with CT-P13 SC vs placebo across both studies. CT-P13 SC was well tolerated, with no new safety signals identified.

CONCLUSIONS

CT-P13 SC was more effective than placebo as maintenance therapy and was well tolerated in patients with moderately to severely active CD or UC who responded to CT-P13 IV induction.

CLINICALTRIALS

gov, Numbers: NCT03945019 (CD) and NCT04205643 (UC).

Switching from intravenous to subcutaneous infliximab and vedolizumab in patients with inflammatory bowel disease: impact on trough levels, day hospital visits, and medical expenses

OBJECTIVE

Subcutaneous (SC) infliximab (IFX) and vedolizumab (VDZ) have recently become available. We aimed to examine the impact of switching from intravenous (IV) to SC IFX and VDZ in patients with inflammatory bowel disease (IBD) on costs, the day hospital burden, trough levels, and clinical outcomes.

METHODS

Our study comprised the cohort of IBD patients receiving IV IFX or VDZ at our hospital in 2022. We evaluated costs, day hospital visits, trough levels, biochemical markers, relapse rates, and self-report outcomes until Jun 30th 2023.

RESULTS

Of 114 patients, 18 continued IV therapy, 80 were switched to SC therapy, and 16 were inductions. Eighty-eight (90%) remained in steroid-free remission with no difference between the IV or SC groups. The mean IFX trough level changed from 8.2 ± 4.5 µg/ml to 14.5 ± 5.9 µg/ml, p < 0.001, and the VDZ trough level from 14.7 ± 7.1 mg/ml to 26.5 ± 13.8 mg/ml, p < 0.001. The average yearly costs of infusions and injections per patient were 2 580 € and 7 482 € for IFX and 15 990 € and 13 101 € for VDZ. The annual reduction of day hospital visits was 6,9 per patient.

CONCLUSIONS

IV and SC IFX and VDZ are equally effective in maintaining remission in IBD, but SC administration reduces day hospital visits and results in higher trough levels. SC VDZ is less and SC IFX more expensive than IV therapy. Further studies are needed to assess optimal dosing and separate trough levels for SC therapy.

Long-term effectiveness and acceptability of switching from intravenous to subcutaneous infliximab in patients with inflammatory bowel disease treated with intensified doses: The REMSWITCH-LT study

BACKGROUND

The long-term risk of relapse after switching from intravenous (IV) to subcutaneous (SC) infliximab remains unknown in inflammatory bowel disease (IBD).

AIMS

To assess the long-term effectiveness and acceptability of switching from IV to SC infliximab in patients with IBD treated with or without an intensified IV regimen.

METHODS

We extended the follow-up of the REMSWITCH study including patients with IBD in clinical remission who were switched from IV to SC infliximab (120 mg/2 weeks). Relapse was defined as clinical relapse or faecal calprotectin increase ≥150 μg/g compared to baseline.

RESULTS

After median follow-up of 18 [15-20] months, among 128 patients, rates of relapse were 13.8% (8/58), 18.4% (7/38), 35.3% (6/17) and 86.7% (13/15) at last follow-up (p < 0.001), in those receiving 5 mg/kg/8 weeks, 10 mg/kg/8 weeks, 10 mg/kg/6 weeks and 10 mg/kg/4 weeks at baseline, respectively. Among relapsing patients, dose escalation led to clinical remission in 82.1% (23/28). In multivariable analyses, factors associated with higher risk of relapse were IV infliximab 10 mg/kg/4 weeks (OR = 61.0 [6.1-607.0], p < 0.001) or 10 mg/kg/6 weeks (OR = 4.7 [1.1-20.2], p = 0.017), and decreased (OR = 5.6 [1.5-20.3], p = 0.004) or stable (OR = 5.0 [1.6-15.0], p = 0.009) serum levels of infliximab between baseline and first post-switch visit. Acceptability was improved at 6 months and did not decrease over time (6.9 ± 1.6 before the switch vs. 8.8 ± 1.3 at 6 months and 8.8 ± 1.3 at last follow-up; p < 0.001). No severe adverse events were reported.

CONCLUSIONS

Switching from IV to SC infliximab 120 mg every other week is safe and well accepted leading to low long-term risk of relapse. Tight monitoring and dose escalation should be recommended for patients receiving 10 mg/kg/6 weeks and 4 weeks, respectively.

Real-world experience with subcutaneous infliximab: broadening treatment strategies for inflammatory bowel disease

INTRODUCTION

The first subcutaneous (SC) formulation of infliximab (IFX), CT‑P13 SC, has been approved in Europe and Australia, including for the treatment of inflammatory bowel disease (IBD).

AREAS COVERED

We provide a comprehensive overview of available clinical trial and real-world data for IFX SC treatment of IBD, focusing on the potential benefits of switching from IFX intravenous (IV) to IFX SC. We evaluate emerging evidence for IFX SC treatment for difficult-to-treat IBD, use as monotherapy, and suitability for patients receiving escalated IFX IV doses. Therapeutic drug monitoring approaches and patient and healthcare system perspectives on IFX SC are also discussed.

EXPERT OPINION

IFX SC represents a significant treatment innovation in the tumor necrosis factor inhibitor class after approximately 20 years of IFX IV availability. Evidence suggests that IFX SC is well tolerated and is associated with high patient acceptance and satisfaction. In addition, effectiveness is maintained in patients with stable disease following switch from IFX IV. Switching may be advisable, given the clinical benefits of IFX SC and its potential to improve healthcare service capacity. There are several areas requiring further research, including the role of IFX SC in difficult-to-treat and refractory disease, and the feasibility of IFX SC monotherapy.

Inflammatory Bowel Disease Patients' Acceptance for Switching from Intravenous Infliximab or Vedolizumab to Subcutaneous Formulation: The Nancy Experience

BACKGROUND

Subcutaneous infliximab and vedolizumab formulations have been developed for maintenance therapy in inflammatory bowel disease. The objective of this study was to explore the inflammatory bowel disease patient's acceptance for switching from intravenous infliximab or vedolizumab to subcutaneous, as well as to describe the causes of refusal or, conversely, the factors associated with acceptance.

METHODS

Patients were prospectively recruited between June 2021 and March 2022 during their infusion of infliximab or vedolizumab in the Medical Day Hospital of Nancy University Hospital. Adult patients with an established diagnosis of inflammatory bowel disease in clinical remission were eligible for inclusion in this study if they had been treated with intravenous infliximab or vedolizumab for at least six months.

RESULTS

One hundred and thirty patients were included in this study. Thirty-six patients (27.7%) received vedolizumab and ninety-four patients (72.3%) received infliximab. Median duration of treatment at inclusion was 7.0 years [3.0-11.0]. In this cohort, 77.7% of patients accepted the switch from intravenous infliximab or vedolizumab to subcutaneous. The main reasons for patient's refusal for switching from intravenous to subcutaneous formulation were fear of loss of efficacy, a more spaced-out medical follow-up, increased frequency of administration, and self-administered injection. A short duration of treatment was associated with a high switch acceptance rate (odd ratio (OR) (95% confidence interval (CI)) = 0.9 (0.8-0.9); p = 0.0002).

CONCLUSION

A large majority of the patients included accepted the switch of their treatment with infliximab or vedolizumab from the intravenous form to the subcutaneous form. This study identified one predictor influencing the acceptance rate in inflammatory bowel disease population: short treatment duration. Subcutaneous infliximab and vedolizumab hold potential for greater patient flexibility by self-administration, reducing travel and hospital attendance for infusion.