LAUSR

BACKGROUND The selective modulation of lymphocyte numbers and function is an attractive concept in the treatment of relapsing-remitting multiple sclerosis (RMS). OBJECTIVE Cladribine tablets (Mavenclad®), an oral RMS medication with an innovative treatment concept, have been available since August 2017. This review article summarizes the currently available clinical study data on cladribine tablets and aspects of their use in clinical practice. RESULTS Cladribine tablets are administered during two treatment phases of 8-10 (two times 4-5) days with a 1-year interval. The drug selectively reduces the number of T and B lymphocytes, which are subsequently gradually reconstituted with divergent kinetics. A pronounced and sustained effect on the clinical and paraclinical MS disease activity is achieved with good tolerability and a favorable overall safety profile. After completing the two short treatment phases, a relevant proportion of the treated patients experience a prolonged treatment-free period with absence of relevant disease activity. Regular monitoring of lymphocyte counts and reliable contraception during the required time frames are the most important safety measures. There is no evidence of an increased risk of malignancies. CONCLUSION Cladribine tablets are an important addition to the therapeutic landscape in RMS. With patient-friendly short dosing periods and a favorable adverse event profile, cladribine tablets provide a sustained and strong reduction of MS disease activity. The primary target population for cladribine tablets is patients with relevant MS disease activity (highly active RMS) while on first-line treatment, e. g. with injectable disease-modifying drugs.