A Clinical Trial Evaluating the Efficacy and Safety of HSK55718 in Patients for Postoperative Pain Treatment in Abdominal Surgery
Conditions
Interventions
- DRUG: HSK55718 dose level1
- DRUG: HSK55718 dose level2
- DRUG: HSK55718 dose level 3
- DRUG: Placebo control
- DRUG: morphine
Sponsor
Haisco Pharmaceutical Group Co., Ltd.