My Son Is 5 And Was Given His Dads Atorvastatin

My son is 5 and was given his dads atorvastatin by accident I asked his 16 year old sister to bring his medicine,as I was in another trying to get things ready for bed. And he told his sister gave him the wrong medicine. I then went down stairs to see what she gave him and and she handed me the atorvastatin.