Metformin (Oral Route)

Before Using

Drug information provided by: Merative, Micromedex®

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of metformin oral solution, extended-release oral suspension, and tablets in children 10 to 16 years of age. However, safety and efficacy of metformin extended-release tablets in the pediatric population have not been established.

Geriatric

Although appropriate studies on the relationship of age to the effects of metformin have not been performed in the geriatric population, geriatric-specific problems are not expected to limit the usefulness of metformin in the elderly. However, elderly patients are more likely to have age-related kidney problems, which may require caution in patients receiving metformin. This medicine is not recommended in patients 80 years of age and older who have kidney problems.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Abiraterone Acetate
• Acetazolamide
• Alogliptin
• Aspirin
• Bexagliflozin
• Bictegravir
• Brinzolamide
• Bupropion
• Capmatinib
• Chloroquine
• Chlorpropamide
• Cimetidine
• Ciprofloxacin
• Dasabuvir
• Delafloxacin
• Diatrizoate
• Dichlorphenamide
• Dofetilide
• Dolutegravir
• Dorzolamide
• Enoxacin
• Ethiodized Oil
• Fedratinib
• Fexinidazole
• Gatifloxacin
• Gemifloxacin
• Glimepiride
• Glipizide
• Glyburide
• Grepafloxacin
• Hydroxychloroquine
• Insulin
• Insulin Aspart, Recombinant
• Insulin Bovine
• Insulin Degludec
• Insulin Detemir
• Insulin Glargine, Recombinant
• Insulin Glulisine
• Insulin Lispro, Recombinant
• Iodipamide
• Iodixanol
• Iohexol
• Iopamidol
• Iopanoic Acid
• Iopromide
• Iothalamate
• Iotrolan
• Ioversol
• Ioxaglate
• Ipodate
• Isavuconazole
• Lanreotide Acetate
• Levofloxacin
• Levoketoconazole
• Liraglutide
• Lomefloxacin
• Methazolamide
• Metrizamide
• Moxifloxacin
• Nateglinide
• Norfloxacin
• Octreotide Acetate
• Ofloxacin
• Ombitasvir
• Paritaprevir
• Pasireotide Diaspartate
• Pioglitazone
• Pramlintide
• Ranolazine
• Repaglinide
• Semaglutide
• Sitagliptin
• Somatrogon-ghla
• Sotagliflozin
• Sparfloxacin
• Tafenoquine
• Thioctic Acid
• Tolazamide
• Tolbutamide
• Topiramate
• Trovafloxacin
• Vandetanib
• Zonisamide

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Acebutolol
• Atenolol
• Betaxolol
• Bisoprolol
• Bitter Melon
• Carteolol
• Carvedilol
• Celiprolol
• Colesevelam
• Esmolol
• Fenugreek
• Glecaprevir
• Glucomannan
• Goldenseal
• Guar Gum
• Hydrastis
• Isocarboxazid
• Labetalol
• Levobunolol
• Linezolid
• Methylene Blue
• Metipranolol
• Metoprolol
• Nadolol
• Nebivolol
• Oxprenolol
• Ozanimod
• Patiromer
• Penbutolol
• Phenelzine
• Pibrentasvir
• Pindolol
• Practolol
• Procarbazine
• Propranolol
• Psyllium
• Rasagiline
• Rifampin
• Safinamide
• Selegiline
• Sotalol
• Timolol
• Tirzepatide
• Tranylcypromine
• Verapamil

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

• Alcohol, excessive use or
• Underactive adrenal glands or
• Underactive pituitary gland or
• Undernourished condition or
• Weakened physical condition or
• Any other condition that causes low blood sugar—Patients with these conditions may be more likely to develop low blood sugar while taking metformin.

• Anemia (low levels of red blood cells) or
• Vitamin B12 deficiency—Use with caution. May make these conditions worse.

• Congestive heart failure, acute or unstable or
• Dehydration or
• Heart attack, acute or
• Hypoxemia (decreased oxygen in the blood) or
• Kidney disease or
• Liver disease or
• Sepsis (blood poisoning) or
• Shock (low blood pressure, blood circulation is poor)—A rare condition called lactic acidosis can occur. Talk with your doctor if you have concerns about this.

• Diabetic ketoacidosis (ketones in the blood) or
• Kidney disease, severe or
• Metabolic acidosis (extra acids in the blood) or
• Type 1 diabetes—Should not be used in patients with these conditions.

• Fever or
• Infection or
• Surgery or
• Trauma—These conditions may cause temporary problems with blood sugar control and your doctor may want to treat you with insulin.

• Description and Brand Names
• Proper Use

Portions of this document last updated: March 01, 2024

Copyright: © Merative US L.P. 1973, 2024. All rights reserved. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes.