Used primarily in the treatment of diabetes, it helps manage blood sugar levels by inhibiting the enzyme aldose reductase. This enzyme is involved in converting glucose to sorbitol, which can accumulate and cause damage in tissues, particularly in the eyes, nerves, and kidneys. By blocking this process, it helps prevent or delay complications associated with diabetes, such as diabetic neuropathy and retinopathy. It is often prescribed as part of a comprehensive diabetes management plan, alongside diet, exercise, and other medications.