Biosimilars (BS) are promoted worldwide because of the high cost of biologics. However, patients are apprehensive about switching to BS. For some diseases, several factors, which may be disease-dependent, influence patients' acceptance of switching to BS. Herein, we evaluated whether factors influencing acceptance for switching were disease-dependent among Japanese patients with different diseases. This cross-sectional study involved pharmacists' interviews with patients who used or planned to use biologics. Demographic and clinical characteristics were retrospectively investigated using the patients' medical records. Multivariate logistic regression showed that switch refusal was associated with a history of adverse reactions to biologics (odds ratio [95% confidence interval (CI)] = 3.38 [1.35-8.44]), history of complaints related to disease activity (3.57 [1.53-8.32]), and unacceptability of generic drugs (7.62 [2.70-21.60]). Subgroup analyses suggested that the unacceptability of generic drugs was a common factor, regardless of the disease. Concomitantly, histories of adverse reactions to biologics and complaints related to disease activity were disease-dependent factors. Healthcare professionals should help patients in selecting BS, considering these factors according to the disease.

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http://dx.doi.org/10.1248/bpb.b22-00429DOI Listing

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