Yes, these medications can enlarge the heart, which is why a good doctor would tell you off the bat that an EKG should be done every 2 years at minimum! My son has been on ADHD medication
since he was 5 years old. I've read every book, manual, talked to hundreds of doctors, researched online, you name it I've done it! And I've made sure that he gets an EKG every 2 years at least, so that a problem like this can be picked up early.