二羟丙茶碱也称喘定、甘油茶碱，是黄嘌呤药物的一种衍生物，与氨茶碱相似，具有扩张支气管和冠状动脉的作用，也有强心和利尿的作用，但作用没有氨茶碱强。主要用于治疗支气管哮喘、喘息性支气管炎、肺水肿、心源性水肿、心绞痛等。其作用是担当腺苷受体拮抗剂和磷酸二酯酶抑制剂。可能引起恶心、呕吐、头痛、心悸等不良反应。

Dyphylline (USAN) (trade names Dilor, Lufyllin), also known as diprophylline (INN), is a xanthine derivative with bronchodilator and vasodilator effects. It is used in the treatment of respiratory disorders like asthma, cardiac dyspnea, and bronchitis. It acts as an adenosine receptor antagonist and phosphodiesterase inhibitor.