Prevention and Treatment of Pyrrolitinib-associated Diarrhea

Inclusion Criteria:

1. One of the following two situations:

   A) Plan to take pyrrolitinib for ≥21 days; B) Third-degree diarrhea or second-degree diarrhea with complications after taking pyrrolitinib at present, plan to take pyrrolitinib for ≥21 days;
2. Age ≥18 years;
3. ECOG PS 0-2;
4. Life expectancy ≥6 months;
5. Participate in this study voluntarily, sign informed consent, have good compliance and are willing to cooperate with the follow-up.

Exclusion Criteria:

1. May be allergic to pyrrolitinib or excipients;
2. There are many factors affecting the absorption of oral drugs, such as inability to swallow, nausea and vomiting;
3. Patients with biliary obstruction;
4. Participate in other diarrhea-related clinical trials;
5. Pregnant and lactating women, fertile women who tested positive in the baseline pregnancy test, or women of childbearing age who were unwilling to use effective contraception during the whole trial period;
6. Concomitant diseases (including but not limited to severe hypertension beyond the control of drugs, severe diabetes, etc.) that, according to the judgment of the researcher, seriously endanger the safety of the patient or affect the completion of the study; The investigator concluded that the patient was not eligible for any of the other conditions in the study.