Hyperuricemia, the condition when serum uric acid level is above normal value, is not only a risk factor for the occurrence of gout, but also the incidence of cardiovascular disease. Red dragon fruit (Hylocereus polyrhyzus) are rich in flavonoids which have the potential as antihyperuricemia. This study aims to prove the effect of red dragon fruit to hyperuricemic rats on the activity of xanthine oxidase enzyme and the levels of nitric oxide (NO). The methods used is a true-experimental randomized pre-post with control group design. The hyperuricemic rats treating with broth blocks and potassium oxonate. The sample in this study consisted of thirty Wistar rats (Rattus norvegicus) were divided into 6 groups: healthy control (K0), hyperuricemic control (K1), and treatment groups (K2, K3, K4, K5). Intervention was given for 28 days with allopurinol 1.8 mg.200g-1 rat's BW and red dragon fruit juice intervention dose of 6 gr.200g-1 rat's BW, 12 gr.200g-1 rat's BW and 18 gr.200g-1 rat's BW. Uric acid levels, XO activity, and NO levels were measured using FS TBHBA method, Xanthine Oxidase Chekine tm Assay Kit, and Nitric Oxide (NO) Colorimetric Assay Kit. The difference in increased UA levels and the smallest XO activity indicated by the K2 group ( p <0.05), the smallest degree of decreasing the small number is shown by the K5 group ( p <0.05) compared to the K0 and K1 groups ( p <0.05). The K5 group has the most effective dose in preventing hyperuricemia and maintaining NO levels 140 mg.200g-1 rat's body weight.