Adenoscan, generically known as adenosine, is a prescription medication primarily used in the medical field as a diagnostic agent for myocardial perfusion imaging. This pharmacological agent is administered intravenously during stress tests to evaluate coronary artery disease in patients who cannot undergo exercise stress tests. Adenoscan works by dilating the arteries of the heart, which increases blood flow and allows for clearer imaging of the heart's blood vessels. This helps in identifying areas of poor blood flow or damage within the heart. It is important for patients to be closely monitored while receiving Adenoscan due to potential side effects such as chest pain, shortness of breath, or heart palpitations.