Risarestat is primarily used in the treatment of diabetic complications, particularly diabetic neuropathy. It functions as an aldose reductase inhibitor, which helps in reducing the accumulation of sorbitol in nerve cells. This accumulation is a key factor in the development of nerve damage in diabetic patients. By inhibiting aldose reductase, Risarestat helps in alleviating symptoms such as pain, numbness, and tingling sensations in the extremities. It is also being researched for its potential benefits in preventing other diabetes-related complications, such as retinopathy and nephropathy, by mitigating the harmful effects of high glucose levels on various tissues.