Patient K. came in with complaints of fever up to 40C, weakness, dyspnea, shortness of breath. When Covid-19 test was performed, the result was positive. A CT scan of the OGC was performed in the emergency room - bilateral polysegmental pneumonia. Past medical history: chronic gastritis, bronchial asthma. The patient was prescribed favipiravir, heparin, cefaperazone, dexamethasone. On the third day the patient noted a sharp deterioration of well-being and tarry stools. On the OAC - Hemoglabin 88, erythrocytes 2.14*1012 . The patient was administered intravenous omeprazole and 2000 ml of NaCL 0.9% 1. justify potential drug interactions 2. Classify drug interactions 3. Describe the mechanism of drug interaction 4. Suggest options for eliminating drug intaraction