A Study Evaluating the Safety, Pharmacokinetics, and Efficacy of HSK21542 Injection in Subjects Undergoing Hemodialysis

Exclusion Criteria

• •1. Expected to undergo kidney transplantation and/or parathyroidectomy during the study;
• •3. Used opioids within one week before screening, or unable to avoid the use of opioids other than the investigational product during the study;
• •4. Participated in any clinical trial of other drug or medical device within 1 month before screening (received study medication or treated by the medical device in the clinical trial);
• •5. Used blood perfusion within 3 months before screening;
• •6. History of medication or drug abuse;
• •7. Average daily alcohol consumption greater than 15 g (15 g of alcohol is equivalent to 450 mL of beer or 150 mL of wine or 50 mL of light liquor) within 3 months before screening;
• •8. Unable to comply with the standard dietary plan and unable to avoid coffee or tea during the study;
• •9. Blood pressure of upper limbs in the supine position at screening: systolic blood pressure \< 90 mmHg, or diastolic blood pressure \< 60 mmHg, or systolic blood pressure \> 180 mmHg, or diastolic blood pressure \> 110 mmHg;
• •10. New York Heart Association (NYHA) Class ≥ III at screening; or confirmed to have abnormal ECG at screening and determined by the investigator to be inappropriate to be enrolled, including QTcF ≥ 480 ms;
• •11. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) or total bilirubin ≥ 1.5 × upper limit of normal (ULN) at screening;
• •12. Blood sodium \> 155 mmol/L at screening;
• •13. Hemoglobin ≤ 80 g/L at screening;
• •14. Positive for hepatitis B surface antigen (HBsAg), hepatitis C antibody (HCVAb), syphilis antibody, or human immunodeficiency virus (HIV) antibody at screening;
• •15. Underwent major surgery (determined by the investigator as major surgery) within 3 months before screening;
• •16. Having a total blood loss of ≥ 200mL within 1 month before screening, except for the blood loss during menstruation in females;
• •17. Females who are pregnant or breastfeeding;
• •18. Any physiological or psychological diseases or conditions that may increase the risk of the trial, affect the subject's compliance with the protocol, or affect the subject's completion of the trial, as judged by the study physician, including but not limited to:
• •1. Severe mental illness or cognitive impairment (e.g., dementia);
• •2. Any other relevant acute or chronic neurological and psychiatric diseases (e.g., encephalopathy, coma, delirium) within 3 months before screening;
• •3. Patients with malignant tumors (including malignant tumors that have been cured without recurrence).