Buy Metformin + Glyburide
Metformin + Glyburide

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Metformin + Glyburide is a combined therapy for the management of type 2 diabetes. This medication pairs two different approaches to Glycemic control: increasing insulin secretion and enhancing the body's sensitivity to it. It is used by adults to keep blood sugar within a target range when diet and exercise alone are insufficient.


Ingredients
Category
Availability
In Stock
Delivery Time
Airmail (14-21 days) | EMS trackable (5-9 days)
Product is shipped in a fully discreet envelope with no content disclosure, including all required documentation inside

Product Sheet

Active Ingredient(s)
Metformin, Glyburide
Reference Brand
Glucovance
Manufacturer
Merck
Product Form
Tablet
Regulatory Classification
Rx
Primary Category
Diabetes Management
Product Category
Metabolic System, Antidiabetic agents, Combinations of oral blood glucose lowering drugs
Pharmacological Class
Biguanides, Sulfonylureas
Clinical Indications
Manufacturer Description
A combination treatment used to control high blood sugar in patients with type 2 diabetes when diet, exercise, and single medications are not enough.
Mechanism of Action
This combination medication lowers blood sugar in two ways. Metformin reduces the amount of glucose produced by the liver and increases the body's sensitivity to insulin. Glyburide (glibenclamide) stimulates the pancreas to release more natural insulin. Together, they help manage blood sugar levels in Type 2 diabetes.
Route of Administration
Oral
Onset Time
1-3 hours
Duration
12-24 hours
Contraindications
Type 1 diabetes, Severe kidney impairment, Liver failure, Diabetic ketoacidosis, Severe infection
Severe Adverse Events
Lactic acidosis, Jaundice, Severe allergic reaction, Persistent low blood sugar
Common Side Effects
Nausea, Mild diarrhoea, Metallic taste, Abdominal pain
Uncommon Side Effects
Hypoglycaemia (low blood sugar), Loss of appetite, Vomiting
Drug Interactions
Alcohol, Corticosteroids, Diuretics, ACE inhibitors
Pregnancy Safety Warnings
Not recommended during pregnancy; insulin is usually preferred. Consult a doctor.
Age Restrictions
Not recommended for children
Storage Guidelines
Store at room temperature in a dry place.
Related Products
Metformin, Gliclazide, Sitagliptin

Metformin + Glyburide FAQ

Can I take Metformin + Glyburide while traveling internationally?

Yes, but you should carry the medication in its original packaging with the prescription label. Some countries may require a doctor’s note for controlled substances; glyburide is not classified as a controlled drug in the UK but checking destination regulations is prudent.

Will the combination tablet affect my workplace drug testing?

Neither metformin nor glyburide are typically screened for in standard workplace or sports drug tests. They are not listed as prohibited substances by most sporting bodies.

What inactive ingredients are in the Metformin + Glyburide tablet?

Common excipients include microcrystalline cellulose, magnesium stearate, and lactose. Patients with a known lactose intolerance should discuss alternatives with their prescriber.

How does the tablet’s appearance differ between dosage strengths?

The 2.5/400 mg tablet is generally a smaller, round, pink tablet, while the 5/500 mg tablet is larger and often blue. Exact imprint codes vary by manufacturer.

Is there a generic version of this combination available in the UK?

Yes, several manufacturers produce generic fixed-dose combinations containing metformin and glyburide, which are approved by the MHRA and listed in the British National Formulary.

Can I use this medication if I have a pacemaker?

Metformin and glyburide do not interfere with pacemaker function. However, any medication changes should be reviewed by a cardiologist if you have complex cardiac conditions.

What should I do if I experience persistent nausea?

Persistent gastrointestinal symptoms are often related to metformin. Taking the tablet with a substantial meal or switching to a slow-release formulation, if available, may help. Consult your prescriber before making any changes.

Does the combination increase the risk of weight gain?

Metformin is weight-neutral or may cause modest weight loss, while glyburide can lead to slight weight gain due to increased insulin levels. The net effect varies between individuals.

Are there any special considerations for patients with heart failure?

Metformin was historically contraindicated in heart failure due to lactic acidosis concerns, but contemporary guidelines allow its use with careful monitoring of renal function. Glyburide’s hypoglycaemia risk may be heightened in fluid-retaining states. Close clinical supervision is advisable.

Metformin + Glyburide: Combination Medication Overview

Metformin + Glyburide is a fixed-dose combination pill that contains the two active ingredients metformin and glyburide. It belongs to the diabetes therapeutic class and is prescribed to help control high blood glucose in adults with type 2 diabetes mellitus. In the United Kingdom the product is available by prescription only and is regulated by the Medicines and Healthcare products Regulatory Agency (MHRA). The combination is supplied in tablet form with two strength options: 2.5 mg glyburide/400 mg metformin and 5 mg glyburide/500 mg metformin.

How Metformin + Glyburide Works in the Body

Pharmacology of Metformin

Metformin belongs to the biguanide class. It primarily reduces hepatic glucose production, improves insulin sensitivity in peripheral tissues, and modestly enhances glucose uptake by muscles. The drug does not increase insulin secretion, which helps to avoid weight gain.

Pharmacology of Glyburide

Glyburide (also known as glibenclamide) is a sulfonylurea. It stimulates pancreatic β-cells to release insulin by binding to the sulfonylurea receptor on the ATP-sensitive potassium channel, leading to membrane depolarisation and insulin exocytosis. The result is a rise in circulating insulin that lowers blood glucose, especially after meals.

Combined Effect

When combined, metformin addresses fasting hyperglycaemia through reduced hepatic output, while glyburide predominately reduces post-prandial spikes by increasing insulin secretion. This complementary action allows for lower doses of each component compared with using the agents separately, potentially reducing side-effect burden while achieving glycaemic targets.

Conditions Treated by Metformin + Glyburide

Metformin + Glyburide is approved in the UK for use in adults with type 2 diabetes mellitus when monotherapy with either metformin or a sulfonylurea does not provide adequate glycaemic control. The combination is intended for patients who require both insulin sensitisation and insulin secretagogue effects. It is not indicated for type 1 diabetes, gestational diabetes, or diabetic ketoacidosis.

Off-Label and Investigational Applications

Current UK guidance does not list any approved off-label uses for this combination. While sulfonylureas have been studied in certain high-risk pre-diabetic populations, any off-label application would require individual medical supervision and a risk-benefit assessment.

Who Should Use Metformin + Glyburide?

Ideal Patient Profile

  • Adults (≥ 18 years) diagnosed with type 2 diabetes
  • Patients whose HbA1c remains above target despite stable doses of metformin or a sulfonylurea alone
  • Individuals with preserved pancreatic β-cell function willing to tolerate sulfonylurea-related hypoglycaemia risk

Absolute Contraindications

  • Known hypersensitivity to metformin, glyburide, or any excipients in the tablet
  • Severe renal impairment (eGFR < 30 mL/min/1.73 m²) - metformin accumulation can cause lactic acidosis, and glyburide clearance is reduced, increasing hypoglycaemia risk
  • Acute or chronic metabolic acidosis, including diabetic ketoacidosis or lactic acidosis
  • Pregnancy (category X) - glyburide crosses the placenta and metformin is not recommended as first-line therapy in pregnancy

Relative Contraindications

  • Moderate renal impairment (eGFR 30-45 mL/min/1.73 m²) - dose adjustment and close monitoring are required
  • Hepatic impairment - reduced metformin clearance may increase lactic acidosis risk
  • Concomitant use of other sulfonylureas, meglitinides, or insulin that could precipitate hypoglycaemia
  • Elderly patients, especially those with frailty or concomitant comorbidities, may need lower starting doses

Special Populations

  • Breastfeeding: Metformin is excreted in breast milk; glyburide is also present, and safety data are limited - use only if benefits outweigh risks.
  • Geriatric: Start at the lower strength (2.5/400 mg) and titrate cautiously.

Safety Profile: Side Effects and Interactions

Common Side Effects

  • Gastrointestinal upset (nausea, abdominal discomfort, diarrhoea) - more often from metformin
  • Mild hypoglycaemia - typically associated with glyburide, especially when meals are missed or carbohydrate intake is low
  • Metallic taste - occasional with metformin

Serious Adverse Events

  • Lactic acidosis: A rare but life-threatening condition linked to metformin accumulation, presenting with rapid breathing, muscle pain, and abdominal discomfort. Prompt medical attention is essential.
  • Severe hypoglycaemia: Can cause confusion, seizures, or loss of consciousness. Patients should be aware of early warning signs.

Major Drug Interactions

  • CYP2C9 inhibitors (e.g., fluconazole, amiodarone): May increase glyburide plasma concentrations, heightening hypoglycaemia risk.
  • Renal-clearing drugs (e.g., contrast agents, NSAIDs): May impair metformin excretion, raising lactic acidosis potential.
  • Concurrent insulin or other sulfonylureas: Additive hypoglycaemic effect - dose reductions are often needed.

Moderate Interactions

  • Thiazide diuretics: Can raise blood glucose, potentially reducing the efficacy of the combination.
  • Beta-blockers: May mask hypoglycaemia symptoms.

Food and Lifestyle Interactions

  • Alcohol: Excessive intake increases the risk of lactic acidosis with metformin and can potentiate hypoglycaemia with glyburide.
  • Meals: Glyburide should be taken with the first main meal of the day to reduce hypoglycaemia risk. Metformin can be taken with meals to lessen gastrointestinal upset.
  • Driving: Patients experiencing hypoglycaemia should avoid operating machinery until symptoms resolve.

If specific interaction data for Metformin + Glyburide are limited, patients should disclose all medications, supplements, and herbal products to their prescriber.

How to Take Metformin + Glyburide

Standard Dosing (UK Prescribing)

  • Initial dose: 2.5 mg glyburide / 400 mg metformin once daily with the first main meal.
  • Titration: After 1-2 weeks, the dose may be increased to 5 mg glyburide / 500 mg metformin if glycaemic targets are not met and tolerability is acceptable.
  • Maximum dose: Do not exceed 5 mg glyburide / 500 mg metformin per tablet; dosing frequency beyond once daily should be directed by a healthcare professional.

Adjustments for Special Populations

  • Renal impairment: Reduce the metformin component or consider alternate therapy; glyburide dose should be lowered to minimise hypoglycaemia.
  • Elderly: Start at the lower strength and monitor closely for hypoglycaemia.

Administration Instructions

  • Swallow tablets whole; crushing or chewing may affect drug release.
  • Take with food to reduce gastrointestinal discomfort from metformin.
  • Store at room temperature, away from moisture and direct sunlight.

Missed Dose

If a dose is missed, take it as soon as remembered with the next main meal. Do not double the dose to compensate.

Overdose

Symptoms may include severe hypoglycaemia (glyburide) and nausea, abdominal pain, or rapid breathing (metformin). Seek emergency medical care immediately. Activated charcoal may be considered for glyburide overdose; for metformin overdose, supportive care and renal replacement therapy are the mainstays.

Discontinuation

Tapering is generally not required for metformin, but abrupt cessation of glyburide may lead to rebound hyperglycaemia. Any change in therapy should be overseen by a prescriber.

Monitoring and Follow-Up

  • HbA1c: Measured every 3 months after therapy initiation or dose adjustment.
  • Renal function: Serum creatinine and eGFR at baseline, then at least annually, or more frequently if renal disease is present.
  • Liver enzymes: Periodic assessment is advisable, particularly if hepatic disease is suspected.
  • Blood glucose: Self-monitoring of fasting and post-prandial values helps detect hypoglycaemia early.
  • Weight and intolerance: Monitor for weight changes and persistent gastrointestinal symptoms.

Patients should contact their healthcare provider if they experience signs of severe hypoglycaemia, unexplained fatigue, muscle pain, or respiratory distress.

Storage and Handling

  • Keep tablets in the original container, tightly closed, and out of reach of children.
  • Store at 15-30 °C (59-86 °F); avoid exposure to excessive heat or humidity.
  • Do not use tablets beyond the expiry date printed on the packaging.
  • For safe disposal, return unused medication to a pharmacy-based take-back scheme.

Medication-Specific Glossary

Biguanide
A class of oral antihyperglycaemic agents, exemplified by metformin, that primarily suppress hepatic glucose production.
Sulfonylurea
A class of oral medications that stimulate insulin release from pancreatic β-cells; glyburide is a second-generation sulfonylurea.
Lactic Acidosis
A rare, serious condition characterized by accumulation of lactate in the blood, which can be precipitated by metformin in the setting of renal impairment or hypoxia.
Hypoglycaemia
An abnormally low blood glucose level, often presenting with shakiness, sweating, confusion, and in severe cases, loss of consciousness.
eGFR (estimated Glomerular Filtration Rate)
A calculated measure of kidney function used to adjust dosing of renally cleared drugs such as metformin.

Medical Disclaimer

This article provides educational information about Metformin + Glyburide and is not a substitute for professional medical advice. Treatment decisions, including the use of any unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.

Information for Metformin + Glyburide is sourced from established medical standards and updated frequently. It is provided for general guidance and should be confirmed with a healthcare professional before use.
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