Aldonil OD Tablet belongs to a group of medicines known as Aldose reductase inhibitors. It can be taken with or without food but you should try to take it at the same time every day. This will help you to remember to take it. The dose and how often you need it will be decided by your doctor so that you get the right amount to control your symptoms. It may take up to 3 months to get the full benefits of this medicine, but you should keep taking it regularly. Do not stop taking it without asking your doctor, otherwise, your condition may worsen.