Metformin is a prescription drug specially intended for the treatment of type 2 diabetes. Its effects are based on helping to control the patient's blood sugar levels, which in the long term helps to avoid more serious health complications. This drug is not going to be efficient for the treatment of type 1 diabetes and is therefore not supposed to be taken by patients diagnosed with this condition. Your doctor will be monitoring your condition very carefully to make sure you get all the benefits of your treatment. Therefore, it's important to mention any medical conditions you have or used to have that may affect the success of your treatment. The following ones are especially important to discuss to make sure they do not affect the success of your treatment in any way: liver disease or a history of heart disease. Always take metformin exactly as recommended without skipping doses or missing them. Your dose may be changed form time to time to make sure you get all the benefits of your treatment. Unless your health care provider recommended doing otherwise, take this drug with a meal. An overdose of metformin can be dangerous and even life-threatening, which is why it is supposed to be reported to your local emergency center as soon as possible.