: My son began taking Concerta about two months ago. His behavior in
: the after school hours has improved. He says he can concentrate
: better. However, I am concerned because he has been having
: irregular heartbeats. We don’t know if that started after he began
: the Concerta or before. The doctor says it’s nothing to worry
: about, but I wonder if anyone else has noticed irregular or rapid
: heartbeat with Concerta. It is a known possible side effect, but
: should I worry?