Introduction and objective: Popularity of dietary supplements and over-the-counter analgesics is constantly increasing. Patients diagnosed with CKD (chronic kidney disease) are more exposed to consequences of unreasonable usage of these kinds of preparations. The reasons are electrolytes disorders and polypharmacy resulting from many comorbidities. Research aim is the analysis of dietary supplements and over-the-counter analgesics usage frequency among CKD patients with an attempt of dietary errors assessment. Material and methods: Questionnaire research was conducted on patients diagnosed with chronic kidney disease treated conservatively and dialyzed. 120 patients were included in the study – 46 treated conservatively (16 women and 30 men) and 74 dialyzed (30 women and 44 men). Results: 87,5% of respondents declared dietary supplements and over-the-counter analgesics use. 82% of man and 96% of woman (p = 0,028). It was 93% among dialysis patients, and 78% among treated conservatively (p = 0,018). 48% of patients take over-the-counter analgesics, 52% calcium, 21% magnesium. Conclusions: The research results indicate overuse of dietary supplements and over-the-counter analgesics among patients with CKD, especially among women and dialysis patients. The most frequent taken preparations are analgesics, calcium and magnesium.