{Reference Type}: Journal Article {Title}: Peripheral oedema as an adverse effect of treatment of secondary progressive multiple sclerosis with siponimod: A case series. {Author}: Chang EH;Hardy TA; {Journal}: J Neuroimmunol {Volume}: 389 {Issue}: 0 {Year}: 2024 Apr 15 {Factor}: 3.221 {DOI}: 10.1016/j.jneuroim.2024.578330 {Abstract}: Siponimod is a sphingosine 1-phosphate receptor (S1P) modulator used to treat secondary progressive multiple sclerosis (SPMS). We report 3 SPMS patients treated with siponimod who developed new or worsening peripheral oedema soon after commencing treatment. In one case, peripheral oedema resulted in immobility. Siponimod-related peripheral oedema deserves wider recognition due to the potential for morbidity and over-investigation. Clinicians should assess for pre-existing oedema and coexisting conditions that may predispose to developing peripheral oedema prior to commencing siponimod.