Although co-administration of amenamevir (a helicase–primase inhibitor) reportedly decreases exposure to midazolam, a CYP3A4 substrate, it remains unclear whether induces the metabolism calcineurin inhibitors (tacrolimus and cyclosporine) metabolized by CYP3A4. Herein, we illustrated two cases induction for amenamevir. The concentration/dose normalized body weight was defined as inhibitors. fir...