Recently i had to quit the Entyvio , my doctor GI mind you sent me to a nuerologist. After all the testing they dicovered brain atrophy. I was like what me?? Well they they discovered that the Entyvio can cause you to have this infection of the brain called PML that's for sure what I had. I was confused a lot, dizzy all the time, loss of balance. I was tested for PML and it was negative, thank God! after all the testing its being malnurished and not absorbing things the right way. which they have been working a lot . But I just want to inform others if taking Etyvio You can develop PML its happened to people using Entyvio. so Beware!!!!