what are the dangers of a heart patient (someone who had a triple bipass last october) who quit taking his prescription for carvedilol for two weeks then started taking it again, im concerned because he hasnt felt good and when i checked on his meds he said he ran out and his next dr. apt is next week so i called the drug store and the script was there ready to pick up. i got the meds, and i read the precautions and it says DO NOT STOP THIS MEDICATION WITHOUT DR. AUTHORIZATION. so im wondering if the effects of starting this med again would be more harm than good at this point?