1、 Adenosine is a vasodilator and also can be used as antiarrhythmic drug.The main indications include: （1）Paroxysmal supraventricular tachycardia. For the treatment of paroxysmal supraventricular tachycardia participation in the atrioventricular node reentry ,Adenosine is very effective as a drug of choice for treatment. Because of its short half-life and insignificant side effects, it can also be used when verapamil is ineffective or contraindicated. （2）Differential diagnosis of ventricular tachycardia. （3）Adjuvant of thallium-201 myocardial perfusion imaging. 2、Adenosine is used for the synthesis of adenosine triphosphate (ATP), Adenosine 5'-monophosphate(AMP), Vidarabine, coenzyme A and other important intermediates. 3、Adenosine can stimulate hair growth to reduce hair loss.