Some medications used to treat ADHD cause vomiting. The medications that cause this adverse side effect do so often. However, this is usually a mild side effect that remits when the patient stops taking the treatment
What is the relationship between ADHD treatment and vomiting?
Most medications used to treat ADHD cause vomiting. Studies lasting a few weeks or months have shown that just under 10% of patients may have this adverse side effect. This is slightly less than twice that of ADHD patients not receiving active treatment. However, this adverse effect is usually mild and improves by lowering the dose of treatment and remits when treatment is withdrawn.