Enprofylline increases heart rate (HR). Injection of Enprofylline (7.5 and 30 mg/kg) increases HR in male WT mouse from 529±23 to 590±20 and 562±20 after the low and high dose, respectively. A high dose of Enprofylline (30 mg/kg) also decreases temperature compared with saline injection in female (but not in males) WT mice, but a low dose (7.5 mg/kg) has little effect on mouse temperature.