Skip to Content

Riomet

Generic Name: metformin (met FOR min)
Brand Names: Fortamet, Glucophage, Glucophage XR, Glumetza, Riomet

What is Riomet?

Riomet (metformin oral solution) is an oral diabetes medicine that helps control blood sugar levels.

Riomet oral soution is used to improve blood sugar control in people with type 2 diabetes.

Riomet is sometimes used in combination with insulin or other medications, but metformin is not for treating type 1 diabetes.

Important information

You should not use Riomet if you have severe kidney disease, or if you are in a state of diabetic ketoacidosis (call your doctor for treatment with insulin).

If you need to have any type of x-ray or CT scan using a dye that is injected into your veins, you will need to temporarily stop taking Riomet.

Riomet may cause a serious condition called lactic acidosis. Get emergency medical help if you have even mild symptoms such as: muscle pain or weakness, numb or cold feeling in your arms and legs, trouble breathing, stomach pain, nausea with vomiting, slow or uneven heart rate, dizziness, or feeling very weak or tired.

Before taking this medicine

You should not use Riomet if you are allergic to metformin, or if you have:

  • severe kidney disease; or

  • if you are in a state of diabetic ketoacidosis (call your doctor for treatment with insulin).

If you need to have any type of x-ray or CT scan using a dye that is injected into your veins, you will need to temporarily stop taking Riomet.

To make sure Riomet is safe for you, tell your doctor if you have:

  • kidney disease;

  • liver disease;

  • a history of heart disease or recent heart attack;

  • if you have recently taken chlorpropamide; or

  • if you are over 80 years old and have not recently had your kidney function checked.

Some people taking Riomet develop a serious condition called lactic acidosis. This may be more likely if you have liver or kidney disease, congestive heart failure, a severe infection, if you are dehydrated, or if you drink large amounts of alcohol. Talk with your doctor about your risk.

It is not known whether Riomet will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medicine.

It is not known whether metformin passes into breast milk or if it could harm a nursing baby. You should not breast-feed while using this medicine.

Riomet should not be given to a child younger than 10 years old.

How should I take Riomet?

Take Riomet oral soultion exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Riomet oral solution is usually taken once or twice daily with a meal. Follow your doctor's instructions.

Your blood sugar will need to be checked often, and you may need other blood tests at your doctor's office.

Low blood sugar (hypoglycemia) can happen to everyone who has diabetes. Symptoms include headache, hunger, sweating, confusion, irritability, dizziness, or feeling shaky. Always keep a source of sugar with you in case you have low blood sugar. Sugar sources include fruit juice, hard candy, crackers, raisins, and non-diet soda. Be sure your family and close friends know how to help you in an emergency.

If you have severe hypoglycemia and cannot eat or drink, use a glucagon injection. Your doctor can prescribe a glucagon emergency injection kit and tell you how to use it.

Check your blood sugar carefully during times of stress, travel, illness, surgery or medical emergency, vigorous exercise, or if you drink alcohol or skip meals. These things can affect your glucose levels and your dose needs may also change. Do not change your medication dose or schedule without your doctor's advice.

Riomet is only part of a complete treatment program that may also include diet, exercise, weight control, and special medical care. Follow your doctor's instructions very closely.

Your doctor may have you take extra vitamin B12 while you are taking metformin. Take only the amount of vitamin B12 that your doctor has prescribed.

Store Riomet at room temperature away from moisture, heat, and light.

See also: Dosage Information (in more detail)

What happens if I miss a dose?

Take the missed dose as soon as you remember (be sure to take the medicine with food). Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of metformin may cause lactic acidosis, which may be fatal.

What should I avoid while taking Riomet?

Avoid drinking alcohol. It lowers blood sugar and may increase your risk of lactic acidosis while taking metformin.

Riomet side effects

Get emergency medical help if you have signs of an allergic reaction to Riomet: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Some people develop lactic acidosis while taking Riomet. Early symptoms may get worse over time and this condition can be fatal. Get emergency medical help if you have even mild symptoms such as:

  • muscle pain or weakness;

  • numb or cold feeling in your arms and legs;

  • trouble breathing;

  • feeling dizzy, light-headed, tired, or very weak;

  • stomach pain, nausea with vomiting; or

  • slow or uneven heart rate.

Common Riomet side effects may include:

  • nausea, vomiting, upset stomach; or

  • diarrhea.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect Riomet?

Tell your doctor about all your current medicines and any you start or stop using, especially:

  • digoxin; or

  • furosemide.

You may be more likely to have hyperglycemia (high blood sugar) if you take Riomet with other drugs that can raise blood sugar, such as:

  • phenytoin;

  • birth control pills or hormone replacement therapy;

  • diet pills or medicines to treat asthma, colds or allergies;

  • a diuretic or "water pill";

  • heart or blood pressure medication;

  • niacin (Advicor, Niaspan, Niacor, Simcor, Slo-Niacin, and others);

  • phenothiazines (Compazine and others);

  • steroid medicine (prednisone, dexamethasone, and others); or

  • thyroid medicine (Synthroid and others).

This list is not complete. Other drugs may increase or decrease the effects of metformin on lowering your blood sugar. Tell your doctor about all medications you use. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Where can I get more information?

  • Your pharmacist can provide more information about Riomet.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Riomet only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2016 Cerner Multum, Inc. Version: 12.01. Revision Date: 2016-04-25, 10:06:10 AM.

Hide