Due to the increase in life expectancy, there is an increase in the number of geriatric patients. Elderly patients with atrial fibrillation have multiple concomitant diseases, which requires special attention. These conditions include a high risk of bleeding/stroke, polypragmasia, chronic kidney disease (CKD), and a tendency to falls. In turn, there is a need for the use of direct oral anticoagulants (POAC). For this reason, there is a need to improve the results of the use of POAC in this group — an increase in the safety of taking the drug and an assessment of drug interactions. The purpose of the work. study of drug interactions of direct oral anticoagulants in elderly patients with AF and CKD on the occurrence of complications. Materials and methods. The study included 503 elderly and senile patients with atrial fibrillation and chronic kidney disease (CKD), stages C2 — C4. Results. The group included 503 patients (mean age 81.4±7.1 years), of whom 186 were men (37 %) and 317 were women (63 %). CKD C2: 32.6 %, C3a: 37.6 %, C3b: 6.6 %, C4: 23.2 %. Coronary heart disease: 63.8 %, hypertension: 87.8 %, cerebrovascular disease: 60.2 %, CHF: 66 %, obesity: 52 %. Polypragmasia: up to 5 drugs — 6.0 %, 5–10–62.0 %, more than 10–32.0 %. 94 patients (p=0.045) were discontinued due to hemorrhages. «Minor» bleeding: nasal and gingival — 13.3 %, hematomas — 3.8 %, gastrointestinal tract — 0.6 %, ulcer exacerbation — 0.2 %, surgery — 0.4 %. Associations were found between «minor» bleeding and rivaroxaban with metoprolol (p=0.01), mebeverine (p=0.027), vaseline oil (p=0.005), citramone (p=0.004), levofloxacin (p=0.04), tobromycin (p=0.04). Also with dabigatran and mebeverine (p=0.007), glimepiride (p=0.019), verapamil (p=0.019), vinpocetine (p=0.007), tamsulosin (p=0.01). Apixaban is associated with bleeding when administered with saxagliptin (p=0.04) and rosuvastatin (p=0.0037). Conclusions. Complications of ASD occurred in 18.7 % of patients, most often nosebleeds and gingival bleeding. Comorbid conditions (CKD stages 2-3a, obesity) affect the pharmacokinetics and efficacy of POAC. Polypragmasia increases the risk of interactions with other drugs, requiring careful monitoring and correction of therapy. Dabigatran etexilate has a lower safety profile compared to rivaroxaban and apixaban.