Glucophage is a biguanide used to treat diabetes mellitus (sugar diabetes) in patients who may or may not also require insulin.
Why is Metformin prescribed?
Metformin is an oral antidiabetic medication used to treat type 2 (non-insulin-dependent) diabetes. Diabetes develops when the body proves unable to burn sugar and the unused sugar builds up in the bloodstream. Metformin lowers the amount of sugar in your blood by decreasing sugar production and absorption and helping your body respond better to its own insulin, which promotes the burning of sugar. It does not, however, increase the body's production of insulin. Metformin is sometimes prescribed along with insulin or certain other oral antidiabetic drugs such as Micronase or Glucotrol. It is also used alone. Standard Metformin tablets are taken two or three times daily. An extended-release form (Metformin XR) is available for once-daily dosing.
Always remember that Metformin is an aid to, not a substitute for, good diet and exercise. Failure to follow a sound diet and exercise plan can lead to serious complications such as dangerously high or low blood sugar levels. Remember, too, that Metformin is not an oral form of insulin and cannot be used in place of insulin.
Where can I order Metformin from? Can I buy Metformin at Canadian Prices?
Yes, if you are from the U.S. then you can buy Metformin at Canadian prices. Currently we will only accept an order for Metformin from U.S. and Canadian residents. Both U.S. and Canadian residents require a prescription to purchase Metformin and when you order Metformin it will be delivered with express shipping.
How should you take Metformin?
Do not take more or less of this medication than directed by your doctor. The drug should be taken with food to reduce the possibility of nausea or diarrhea, especially during the first few weeks of therapy. If taking Metformin XR, be sure to swallow the tablet whole; do not crush it or chew it. The inactive ingredients in the tablet may occasionally appear in the stool. This is not a cause for concern. --If you miss a dose...Take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Never take 2 doses at the same time. --Storage instructions...
Store it at room temperature.
What side effects may occur with Metformin?
Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Metformin. If side effects from Metformin occur, they usually happen during the first few weeks of therapy. Most side effects are minor and will go away after you've taken Metformin for a while.
More common side effects may include:
Abdominal discomfort, diarrhea, gas, headache, indigestion, nausea, vomiting, weakness
Less common side effects may include:
Abdominal distention, abnormal stools, altered sense of taste, chest discomfort, chills, constipation, dizziness, flu-like symptoms, flushing, increased sweating, low blood sugar, light-headedness, muscle pain, nail disorders, pounding heartbeat, rash, shortness of breath, upper respiratory infection
Possible food and drug interactions
If Metformin is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Metformin with the following:
Amiloride (Moduretic)
Calcium channel blockers (heart medications) such as Calan, Isoptin, and Procardia
Cimetidine (Tagamet)
Decongestant, airway-opening drugs such as Sudafed and Ventolin
Digoxin (Lanoxin)
Estrogens such as Premarin
Furosemide (Lasix)
Glyburide (Micronase)
Isoniazid (Rifamate), a drug used for tuberculosis
Major tranquilizers such as Thorazine
Morphine
Niacin (Niaspan)
Nifedipine (Adalat, Procardia)
Oral contraceptives
Phenytoin (Dilantin)
Procainamide (Procanbid, Pronestyl)
Quinidine (Quinidex)
Quinine
Ranitidine (Zantac)
Steroids such as prednisone (Deltasone)
Thyroid hormones such as Synthroid
Triamterene (Dyazide, Dyrenium)
Trimethoprim (Bactrim, Septra)
Vancomycin (Vancocin)
Water pills (diuretics) such as HydroDIURIL, Dyazide, and Moduretic
Do not drink too much alcohol, since excessive alcohol consumption can cause low blood sugar and alcohol enhances some effects of this drug.
Special information if you are pregnant or breastfeeding
If you are pregnant or plan to become pregnant, tell your doctor immediately. Metformin should not be taken during pregnancy. Since studies suggest the importance of maintaining normal blood sugar (glucose) levels during pregnancy, your doctor may prescribe insulin injections instead.
It is not known whether Metformin appears in human breast milk. Therefore, women should discuss with their doctors whether to discontinue the medication or to stop breastfeeding. If the medication is discontinued and if diet alone does not control glucose levels, then your doctor may consider insulin injections.
Recommended dosage
Your doctor will tailor your dosage to your individual needs.
ADULTS
Metformin
The usual starting dose is one 500-milligram tablet twice a day, taken with morning and evening meals. Your doctor may increase your daily dose by 500 milligrams at weekly intervals, based on your response up to a total of 2,000 milligrams. An alternative starting dose is one 850-milligram tablet a day, taken with the morning meal. Your doctor may increase this by 850 milligrams at 14-day intervals, to a maximum of 2,550 milligrams a day. The usual maintenance dose ranges from 1,500 to 2,550 milligrams daily. If you take more than 2,000 milligrams a day, your doctor may recommend that the medication be divided into three doses, taken with each meal. Metformin XR The usual starting dose is one 500-milligram tablet once daily with the evening meal. Your doctor may increase your dose by 500 milligrams at weekly intervals, up to a maximum dosage of 2,000 milligrams a day. If a single 2,000-milligram dose fails to control your blood sugar, you may be asked to take 1,000-milligram doses twice a day. If you need more than 2,000 milligrams a day, the doctor will switch you to regular Metformin.
CHILDREN
Metformin
For children 10 to 16 years old, the usual starting dose is one 500-milligram tablet twice a day with meals. The dosage may be increased by 500 milligrams at weekly intervals up to a maximum of 2,000 milligrams daily. Metformin has not been tested in children younger than 10. Metformin XR This form of the drug has not been tested in children younger than 17.
OLDER ADULTS
Older people and those who are malnourished or in a weakened state are generally given lower doses of Metformin because their kidneys may be weaker, making side effects more likely.
Overdosage
An overdose of Metformin can cause lactic acidosis (see "Most important fact about this drug"). If you suspect a Metformin overdose, seek emergency treatment immediately.
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