Children receiving ADHD medication don’t have an increased risk of heart problems during treatment.

A new study of 1.2 million US youths across 28 states confirms there are no short-term effects from central nervous system stimulants.

Concerns were raised about children who were on continuous stimulant medication for more than 10 years and into their adulthood. The effects of even minor increases in blood pressure and heart rate over the long term are unknown.

It has been recommended that cardiovascular monitoring should continue throughout a course of treatment.