Drug-Drug Interaction and Food Effect of Sudapyridine(WX-081) With Itraconazole and Rifampin in Healthy Chinese Adults

Lab values

• Participants with central nervous system, cardiovascular, gastrointestinal, urinary, respiratory, musculoskeletal, endocrine, or hematologic diseases or other chronic/acute diseases, or those with significant surgical history affecting drug absorption, distribution, metabolism, or excretion.
  • Participants with conditions that increase the risk of QT prolongation, or with a family history of sudden cardiac death (\<40 years old) or other hereditary diseases.
  • Clinically significant laboratory abnormalities at screening, including:
  • ALT/AST/TBIL values exceeding 2 times the upper limit of normal. Estimated creatinine clearance (ClCr) \< 60 mL/min. Participants with urinary system disorders. Use of any prescription or over-the-counter drugs, supplements, or herbal products within 2 weeks before dosing that may affect the study evaluation.
  • Known allergy to Sudapyridine (WX-081) or other related compounds. Participants positive for hepatitis B surface antigen (HBsAg), anti-hepatitis C virus antibody (Anti-HCV), anti-HIV antibody, or syphilis antibody.
  • History of alcohol or drug abuse:
  • Alcohol: ≥14 units per week; a unit equals 285 mL beer or 100 mL wine. Participants who smoke more than 5 cigarettes/day and cannot stop during the study.
  • Donation of blood exceeding 400 mL within 1 month prior to the study. Participants enrolled in other drug trials within 3 months before the study. Use of CYP3A4 or P-gp inhibitors/inducers within 28 days prior to the study (e.g., itraconazole, rifampin).
  • Unwillingness to avoid grapefruit, pomelo, or other food/drinks affecting drug metabolism during the study.
  • Participants with a history of intestinal surgery affecting drug absorption. Women who are pregnant or lactating or intending to become pregnant. Participants deemed unsuitable by the investigator due to other reasons.

• Participants must be healthy male or female adults of Chinese nationality, aged 18-50 years (including 18 and 50).
  • Male participants must weigh at least 50 kg, and female participants at least 45 kg. Body mass index (BMI) should be between 18 and 28 kg/m² (including 18 and 28), and weight (kg)/height (m²).
  • Participants must undergo a comprehensive physical examination, 12-lead ECG, vital signs assessment, and laboratory tests. Results must be normal or deemed clinically insignificant by the investigator, meeting the following:
  • 12-lead ECG must show QTcF ≤ 450 ms (≤ 200 ms for A Study), QRS duration ≤ 120 ms, and PR interval ≤ 200 ms. PR elongation may allow entry if deemed clinically insignificant by the investigator.
  • Participants (including their partners) must agree to use effective contraception from the date of screening to 6 months after the last study drug administration and must avoid sperm/egg donation during this period.