What is this medication for?
Metformin belongs to a class of medications called oral hypoglycemics (medications that lower blood sugar). It is used for the control of blood glucose (blood sugar) by people with type 2 diabetes. It is used when diet, exercise, and weight reduction have not lowered blood glucose well enough on their own. Metformin works by reducing the amount of glucose made by the liver and by making it easier for glucose to enter the tissues of the body.
Your doctor may have suggested this medication for conditions other than those listed here. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor. Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it. Do not stop taking this medication without consulting your doctor.
What form(s) does this medication come in?
Glucophage® is available as:
Some medications may have other generic brands available. Always ask your doctor or pharmacist about the safety of switching between brands of the same medication.
How should I use this medication?
The recommended adult dose of metformin ranges from 500 mg three or four times daily to 850 mg two or three times daily. The usual starting dose of metformin for children is 500 mg twice daily. The maximum daily dose should not exceed 2,550 mg daily for adults and 2,000 mg for children 10 to 16 years of age. Tablets should be taken with food whenever possible to reduce the risk of nausea and vomiting.
Metformin may be used alone or with other medications that reduce blood glucose. To ensure the medication is working well, monitor your blood glucose on a regular basis as directed by your doctor or diabetes specialist.
It is important that this medication be taken exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
Store this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Who should NOT take this medication?
This medication should not be taken by anyone who:
- is allergic to metformin or any ingredients of the medication
- has kidney disease or kidney dysfunction
- has congestive heart failure requiring medication
- has acute or chronic metabolic acidosis, including diabetic ketoacidosis
- is receiving injections of iodinated contrast materials for radiological studies
