Regadenoson injection is a pharmacologic stress agent used for radionuclide myocardial perfusion imaging in patients unable to tolerate exercise stress testing. This pre-filled syringe delivers 0.4 mg in 5 mL (0.08 mg/mL) for intravenous administration. The convenient single-dose format ensures accurate dosing and reduces preparation time in clinical settings. Sterile and non-returnable, it provides reliable cardiac imaging support for diagnostic evaluation of coronary artery disease.