What is metformin?
Metformin is an oral diabetes medicine that helps control blood sugar levels. Metformin is for people with type 2 (non-insulin-dependent) diabetes. Metformin is sometimes used in combination with insulin or other medications, but it is not for treating type 1 diabetes. Metformin may also be used for purposes other than those listed in this medication guide.
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What is the price of this medication and similar alternatives?
Pricing information provided by drugstore.com.
| Actoplus Met 15-500MG TABS | TAKEDA PHARMACEUTICALS | 30/$95.99 or 90/$626.98 |
| Actoplus Met 15-850MG TABS | TAKEDA PHARMACEUTICALS | 30/$95.99 or 90/$262.96 |
| Avandamet 1-500MG TABS | GLAXO SMITH KLINE | 60/$67.85 or 180/$189.32 |
| Avandamet 2-1000MG TABS | GLAXO SMITH KLINE | 60/$129.99 or 180/$365.96 |
| Avandamet 2-500MG TABS | GLAXO SMITH KLINE | 60/$136.68 or 180/$378 |
| Avandamet 4-1000MG TABS | GLAXO SMITH KLINE | 60/$222.87 or 180/$647.5 |
| Avandamet 4-500MG TABS | GLAXO SMITH KLINE | 60/$225.99 or 180/$629.96 |
| Fortamet 1000MG TB24 | SCIELE PHARMA | 60/$203.99 or 180/$595.98 |
| Glucophage 1000MG TABS | B-M SQUIBB U.S. (PRIMARY CARE) | 60/$119.97 or 180/$325.96 |
| Glucophage 500MG TABS | B-M SQUIBB U.S. (PRIMARY CARE) | 60/$48.99 or 180/$139.97 |
| Glucophage 850MG TABS | B-M SQUIBB U.S. (PRIMARY CARE) | 60/$96.33 or 180/$268.27 |
| Glucophage XR 500MG TB24 | B-M SQUIBB U.S. (PRIMARY CARE) | 60/$57.99 or 180/$161.96 |
| Glucophage XR 750MG TB24 | B-M SQUIBB U.S. (PRIMARY CARE) | 30/$41.99 or 90/$118.97 |
| Metformin HCl 1000MG TABS | MUTUAL PHARMACEUTICAL | 30/$17.99 or 60/$31.97 |
| Metformin HCl 500MG TABS | IVAX PHARMACEUTICALS, INC. | 60/$33.99 or 180/$85.99 |
| Metformin HCl 500MG TB24 | TEVA PHARMACEUTICALS USA | 60/$39.99 or 180/$119.97 |
| Metformin HCl 750MG TB24 | TEVA PHARMACEUTICALS USA | 30/$32.99 or 90/$89.99 |
| Metformin HCl 850MG TABS | MUTUAL PHARMACEUTICAL | 60/$51.99 or 180/$130.99 |
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What are the possible side effects of metformin?
Get emergency medical help if you have any of these symptoms of lactic
acidosis: weakness, increasing sleepiness, slow heart rate, cold feeling, muscle pain,
shortness of breath, stomach pain, feeling light-headed, and fainting.
Stop using metformin and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face,
lips, tongue, or throat.
Call your doctor at once if you have any of these serious side effects:
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feeling short of breath, even with mild exertion;
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swelling or rapid weight gain; or
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fever, chills, body aches, flu symptoms.
Less serious side effects may include:
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headache or muscle pain;
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weakness; or
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mild nausesa, vomiting, diarrhea, gas, stomach pain.
This is not a complete list of side effects and others may occur. Tell
your doctor about any unusual or bothersome side effect.
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How should I take metformin?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results from this medication. Take metformin with a meal, unless your doctor tells you otherwise. Some forms of metformin are taken only once daily with the evening meal. Follow your doctor's instructions. Metformin is only part of a complete program of treatment that also includes diet, exercise, and weight control. It is important to use this medicine regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.
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What is the most important information I should know about metformin?
Do not use metformin if you have kidney disease, or if you are in a state of diabetic ketoacidosis (call your doctor for treatment with insulin). Before taking metformin, tell your doctor if you have liver disease or a history of heart disease. Some people have developed a life-threatening condition called lactic acidosis while taking metformin. Get emergency medical help if you have any of these symptoms of lactic acidosis: weakness, increasing sleepiness, slow heart rate, cold feeling, muscle pain, shortness of breath, stomach pain, feeling light-headed, and fainting.
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What happens if I miss a dose?
Take the missed dose as soon as you remember (be sure to take the medicine with food). If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
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What other drugs will affect metformin?
You may be more likely to have hyperglycemia (high blood sugar) if you are taking metformin with other drugs that raise blood sugar. Drugs that can raise blood sugar include: isoniazid; diuretics (water pills); steroids (prednisone and others); phenothiazines (Compazine and others); thyroid medicine (Synthroid and others); birth control pills and other hormones; seizure medicines (Dilantin and others); and diet pills, or medicines to treat asthma, colds or allergies. You may be more likely to have hypoglycemia (low blood sugar) if you are taking metformin with other drugs that lower blood sugar. Drugs that can lower blood sugar include:
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Can I take this if I am pregnant or trying to get pregnant or if I am breastfeeding?
Metformin has been assigned to pregnancy category B by the FDA. Animal studies have failed to reveal evidence of fetotoxicity. There are no controlled data in human pregnancy. Insulin remains the mainstay of therapy for gestational diabetes due to the close glucose control it affords. Metformin is only recommended for use during pregnancy when benefit outweighs risk.
There are no data on the excretion of metformin into human milk. Metformin is excreted into the milk of rats and achieves milk concentrations comparable to those found in plasma. The manufacturer recommends that due to the potential for serious adverse reactions in nursing infants, a decision should be made to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.
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Who should NOT use this medication?
- Sole therapy in patients with type 1 diabetes and in patients with diabetes complicated by acute or chronic metabolic acidosis, including diabetic ketoacidosis with or without coma.
- Renal impairment (e.g., ≥1.5 or 1.4 mg/dL in men or women, respectively) or abnormal Scr. Renal impairment may result from conditions such as cardiovascular collapse (shock), AMI, or septicemia.
- Congestive heart failure requiring drug therapy (e.g., digoxin, furosemide).
- Known hypersensitivity to metformin hydrochloride or any ingredient in the formulations.
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What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this medicine. You may have signs of low blood sugar, such as hunger, headache, confusion, irritability, drowsiness, weakness, dizziness, tremors, sweating, fast heartbeat, seizure (convulsions), fainting, or coma. An overdose of metformin may cause a life-threatening condition called lactic acidosis. Get emergency medical help if you have any of these symptoms of lactic acidosis: weakness, increasing sleepiness, slow heart rate, cold feeling, muscle pain, shortness of breath, stomach pain, feeling light-headed, and fainting.
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What should I discuss with my healthcare provider before taking metformin?
Some people have developed a life-threatening condition called lactic acidosis while taking metformin. Get emergency medical help if you have any of these symptoms of lactic acidosis: weakness, increasing sleepiness, slow heart rate, cold feeling, muscle pain, shortness of breath, stomach pain, feeling light-headed, and fainting. You may be more likely to develop lactic acidosis if you have congestive heart failure. Older adults may also have a higher risk of developing lactic acidosis. Talk with your doctor about your individual risk.
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Can I stop taking the medication if I feel better?
As a general rule, you should always take your medications exactly as prescribed and do not change the dosage or stop taking the medication without first discussing it with your healthcare provider.
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I am on so many medications; do I have to take them all?
This is called polypharmacy—many different medications being used at the same time by one person. Sometimes, being on multiple medications is acceptable and appropriate but at other times it may be problematic. If you are receiving your medications from multiple physicians you need to ensure that they all know what medications you are taking. The best way to do this is to make a list of all the medications you are currently using, including all nutritional supplements, homeopathic remedies, vitamins and over-the-counter drugs (if possible, also include all the diseases you have been diagnosed with). Give a copy to every doctor who takes care of you so they have it on file, this way they can avoid duplicating medications and perhaps even try to consolidate some. After every doctor's visit remember to update the list accordingly. Also, as much as you possibly can, try to use the same pharmacy to fill all your prescriptions, this way any potential drug interactions can be caught and averted.
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Where can I get more information?
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