Investigation of Drug-drug Interaction of Ritonavir and Itraconazole on the Pharmacokinetics of SHR-A1811 in Subjects With HER2-expressing Advanced Breast Cancer

Exclusion Criteria5

• Known active central nervous system metastases that have not been treated with surgery or radiation, except those that have been stable for at least 1 month after treatment and have discontinued corticosteroids for \>2 weeks;
• Having cardiac diseases, such as severe/unstable angina, symptomatic congestive heart failure (NYHA II-IV), clinically significant supraventricular or ventricular arrhythmias requiring treatment or intervention, myocardial infarction within 6 months before the first administration, etc.
• Known severe allergic history to any component of the SHR-A1811 product (ADC, total antibody, unconjugated toxin SHR169265 or its excipients), or hypersensitivity to humanized monoclonal antibody products (such as trastuzumab, pertuzumab, etc.);
• Having contraindications to ritonavir or itraconazole use;
• Having one or more factors that affect oral medication (such as inability to swallow, chronic diarrhea and intestinal obstruction, partial or total gastrectomy, etc.), or having active gastrointestinal diseases or other diseases that may significantly affect drug absorption, distribution, metabolism, or excretion.