I am on 25 mg of Atenolol daily for benign PVCs. I have no heart problems, structurally normal, just am aware of the PVCs. The allergist I just saw told me in the event of a major reaction I may have to take something beyond benedaryl. He would rather I not take epinephrine and prescribed glucagon something diabetics use? It is in a syringe and he told me it is not as dangerous as epinephrine.