Previous reports of drug-induced PML using the FAERS database have focused on all kinds of diseases, multiple sclerosis, or multiple myeloma; however, none have centered on RA (Raisch et al., 2016; Focosi et al., 2019; Oshima et al., 2019; Jonasson et al., 2023). The gene discussed is PML; the disease is AL amyloidosis.