Glycoprotein IIb/IIIa inhibitors play a key role in the treatment of patients who have acute coronary syndromes and undergone percutaneous coronary intervention. However, its serious complication is diffused alveolar hemorrhage. A 73-year-old diabetic woman presented with chest pain and dynamic ST elevation in ECG and positive troponin. She had occlusion in two coronary arteries and underwent percutaneous coronary intervention. The eptifibatide was administered. After hours, she showed respiratory symptoms, as well as drop of blood pressure and hemoglobin. All differential diagnoses suggested for her clinical presentation were evaluated, and finally, on the sixth day diffuse alveolar hemorrhage was diagnosed. Although respiratory symptoms such as hemoptysis and dyspnea may occur as complications of pulmonary edema and/or pneumonia, assumed clinical suspicion for pulmonary hemorrhage leading to early detection of it. Moreover, there is no definitive guideline for decreased bleeding complications and treatment of alveolar hemorrhage caused by glycoprotein IIb/IIIa receptor inhibitors.