GPT and Recurrent upper respiratory tract infections: Common AEs occurring in 10% of participants or more were MS relapse (29%), nasopharyngitis (17%), upper respiratory tract infection (15%), increased ALT (15%), increased AST (12%), headache (11%), urinary tract infection (11%), pharyngitis (10%), and back pain (10%; a listing of AEs with a > 5% incidence are shown in Table 4).