Aim. To make a comparative clinical and economic assessment of a transdermal therapeutic system (TTS) for fendivia and traditional opioid analgesics in patients with malignant neoplasms (MN) during palliative care. Materials and methods. Pharmacoeconomic analysis of opioid analgesics used in patients with MN during analgesic therapy was made using the cost-effectiveness analysis in the framework of a budget impact analysis (BIA). Results. The assessment of the medical cost structure in the fendivia and morphine groups (100 patients in each group), which was made in the framework of BIA, demonstrated that the cost of pharmacotherapy in the fendivia group was comparable with that of an ambulance call for additional analgesia and correction of the side effects of performed therapy (615,804.00 and 645,337.60 rbl. monthly, respectively). At the same time, in the morphine group the cost of an ambulance call was more than 20 times that of pharmacotherapy (2,117,514.00 and 93,120.00 rbl. monthly, respectively). Thus, the total savings from applying the fendivia TTS in the group of 100 patients ranged up to 949,492.40 rbl. monthly. Conclusion. The application of the fendivia TTS is clinically and pharmacoeconomically valid and leads to a considerable reduction in public health care costs.