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Tocilizumab Effectiveness After Switching from Intravenous to Subcutaneous Route in Patients with Rheumatoid
Jean Darloy1, Nicolas Segaud2, Jean-Hugues Salmon3
1Rheumatology Department, Hôpital Roger Salengro, University Hospital of Lille, Lille, France. jeandarloy@gmail.com.
Rheumatology and Therapy
|January 12, 2019
Summary
Switching to subcutaneous tocilizumab maintained effectiveness in rheumatoid arthritis (RA) patients. This real-world study confirmed similar outcomes for patients switching from intravenous to subcutaneous formulations at 6 and 12 months.
Area of Science:
- Rheumatology
- Pharmacology
- Clinical Trials
Background:
- Rheumatoid arthritis (RA) management often involves biologic therapies like tocilizumab.
- Transitioning from intravenous (IV) to subcutaneous (SC) formulations aims to improve patient convenience and potentially maintain treatment efficacy.
- Real-world data is crucial for understanding treatment effectiveness outside controlled trial settings.
Purpose of the Study:
- To assess the sustained effectiveness of subcutaneous tocilizumab 6 months after switching from IV formulation in RA patients.
- To evaluate patient and disease characteristics, long-term effectiveness up to 12 months, and therapeutic maintenance.
- To identify potential predictors for switching from IV to SC tocilizumab.
Main Methods:
- Observational study analyzing RA patients treated with tocilizumab from a shared medical file.
- Inclusion criteria: patients treated between April 2015 and January 2016.
- Primary endpoint: proportion of patients maintaining or improving their DAS28-ESR disease activity category at 6 months post-switch. Propensity score analysis was used to balance groups.
Main Results:
- 71.2% of patients maintained or improved their DAS28-ESR category at 6 months, with no significant difference between switchers and non-switchers (73.3% vs. 70.3%).
- The study demonstrated sustained effectiveness at both 6 and 12 months.
- Therapeutic maintenance rates were comparable between patients who switched and those who did not. No clinical factors predicted switching in patients already in remission.
Conclusions:
- The RoSwitch study confirms that switching from intravenous to subcutaneous tocilizumab maintains treatment effectiveness in rheumatoid arthritis patients.
- The transition to a subcutaneous formulation is a viable option for long-term RA management.
- Real-world evidence supports the efficacy and therapeutic maintenance of SC tocilizumab post-IV to SC switch.
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