Effect of Melatonin in Patients With Diabetic Peripheral Neuropathy

Inclusion Criteria: 1. Patients aged 40-75 years diagnosed with type 2 DM. 2. Diabetes duration at least 1 year. 3. Patients diagnosed with diabetic peripheral neuropathy. 4. Stable antidiabetic medication for at least 1 month before enrollment and during the trial Exclusion Criteria: 1. Patients with autoimmune disorders (such as lupus and rheumatoid arthritis), thyroid diseases, peripheral arterial disease and cancer patients. 2. Patients with severe kidney or liver dysfunction. 3. Patients diagnosed with neurodegenerative diseases. 4. Active infection. 5. Use of medications or supplements known to cause or treat peripheral neuropathy. 6. Alcohol consumption or substance abuse. 7. Patients consuming any antioxidant supplements or anti-inflammatory medicines during or 3 months before enrollment. 8. Pregnancy or lactation or expecting to get pregnant during the study. 9. Allergy to melatonin.