My husband has three stents in his heart. His recent Echocardiogram was negative. His doctor put him on Imdur because my husband complained about feeling winded easily. Sometimes he has trouble catching his breath. He never had chest pains when he had his first heart attack three years ago and got one Stent. Only discomfort on his upper left shoulder and down his left arm. Then he had pressure in his chest several months ago and had two more Stents. Still no chest pains. Today was the first time he experienced sharp pains. He started the generic brand of Imdur four days ago. If the pains come back, should he take a Nitro pill or go to the emergency?