My Father Accidentally Took Double Dosage Od Carvedilol 3.125..isosorbide Dn

My father accidentally took double dosage od carvedilol 3.125..isosorbide dn 5 mg...metformin 500 mg...told daughter he didnt take his night meds when he did first dose 7:30 next dose cause he said he didnt take it but di was at 9:00 cst..what should we do his heart is very bad in need of bypass