Abstract:Objective To observe the effect of medical ozone combined with slow-release oxycodone hydrochloride on pain relief, mental state, safety and quality of life in the patients with moderate to severe cancer pain. Methods Eighty cancer patients were randomly divided into two groups with 40 cases in each group. The patients in the combined group received medical ozone combined with slow-release oxycodone, and the patients in the Oxycontin group only received slow-release oxycodone. Pain score, depression score, quality of life, drug dosage and adverse reactions before treatment, 2 weeks after treatment and 1 month after discharge were recorded. Results After treatment, the pain of the two groups were well controlled and had no significant difference. After 2 weeks of treatment and 1 month after discharge, the drug dosage of the combined group was lower than that of the Oxycontin group (P < 0.05). After 2 weeks of treatment and 1 month after discharge, the quality of life and depression of the combined group were significantly improved compared to the Oxycontin group (P < 0.05). There was no serious complication in the two groups. The incidences of nausea and vomiting, drowsiness and pruritus were higher in the Oxycontin group than in the combined group (P < 0.05). Conclusions In the treatment of moderate to severe cancer pain, medical ozone combined with slow-release oxycodone, can significantly improve the mood and quality of life of the patients, reduce the dosage of opioids and has no obvious complications. It is recommended to be used in clinic.