as per the details u have given,
your husband having CAD with angioplasty
done.. all the above drugs are used to prevent the further blocks in coronary arteries and they doesnt cause the side effects that could worry u..all the above drugs are strictly recommended .
i advise you to take him to a cardiologist and make him to check in blood pressure..
blood pressure issue/ work stress
may be the cause for his irritability.