Adenosine is a ubiquitous extracellular signaling molecule with essential functions in human physiology. From providing the backbone for basic energy transfer through its adenosine triphosphate (ATP) and adenosine diphosphate interactions to its role in cell signaling, adenosine is a fundamental component of human biology (1). Adenosine has far-reaching effects as an extracellular signaling molecule inducing vasodilation in most vascular beds, regulating activity in the sympathetic nervous ... Adenosine is a ubiquitous extracellular signaling molecule with essential functions in human physiology. Due to the widespread expression of adenosine receptors, it has far-reaching effects across ... Adenosine is a medication used in myocardial perfusion scintigraphy and to treat supraventricular tachycardia. Adenosine is an anti-arrhythmic medication. It regulates heart beat by blocking abnormal electrical signals in the heart. Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them.