Financial reimbursement incentives in the use of biosimilars for rheumatoid arthritis in Japan

The results indicate that while the reimbursement policy was associated with a short-term increase in the uptake of etanercept biosimilars, it had limited impact on infliximab biosimilars. This variation suggests that financial incentives alone may not be sufficient to enhance biosimilar adoption and that policies must consider drug-specific and healthcare setting-specific factors.