Product image of Metformin (Metformin Hydrochloride) supplied by GNH India

Metformin

Active Ingredient:
Metformin Hydrochloride
Origin:
EU

Metformin (Metformin Hydrochloride)

Metformin, the active ingredient in Metformin, is a Biguanide presented as a tablet for oral use. It treats type 2 diabetes mellitus in adults. GNH India supplies Metformin as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Medley Pharma Limited

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Indications & Clinical Uses

Metformin is used within the antidiabetic drug class to improve glycaemic control.

  • Type 2 diabetes mellitus: lowers blood glucose by reducing hepatic glucose output and enhancing insulin sensitivity.
  • Prediabetes: helps delay progression to overt diabetes by improving fasting glucose levels.
  • Polycystic ovary syndrome: may improve insulin resistance and restore ovulatory function.

How It Works

  • Metformin acts primarily by inhibiting mitochondrial respiratory-chain complex I, which reduces hepatic gluconeogenesis. It also decreases intestinal glucose absorption and increases peripheral glucose uptake by enhancing insulin receptor signaling, thereby improving overall insulin sensitivity without stimulating insulin secretion.

Side Effects

Metformin may cause a range of adverse reactions.

Common Side Effects

  • Gastrointestinal upset: nausea, abdominal discomfort, or loss of appetite.
  • Diarrhea: frequent loose stools, especially during treatment initiation.
  • Metallic taste: transient alteration in taste perception.
  • Decreased vitamin B12 levels: may develop with long‑term use.

Serious or Rare Side Effects

  • Lactic acidosis: a rare but life‑threatening accumulation of lactate.
  • Severe skin reactions: such as Stevens‑Johnson syndrome or toxic epidermal necrolysis.
  • Hepatotoxicity: abnormal liver enzymes indicating liver injury.
  • Hypoglycaemia: when combined with other glucose‑lowering agents.
  • Pancreatitis: inflammation of the pancreas reported in isolated cases.

Precautions & Warnings

Metformin requires careful monitoring in several clinical situations.

  • Renal function assessment: avoid use in severe renal impairment to reduce lactic acidosis risk.
  • Hepatic function evaluation: monitor liver disease patients for potential toxicity.
  • Cardiovascular status: use cautiously in patients with unstable heart failure.
  • Concomitant medications: review drugs that may affect renal clearance or increase lactic acidosis risk.
  • Elderly patients: consider dose reduction and close monitoring.
  • Store at room temperature: keep in the original container, protect from moisture and heat.

Avoid Interactions

Metformin can interact with various medicines, altering its efficacy or safety.

Major Interactions (Avoid)

  • Iodinated contrast agents: may precipitate acute renal failure and lactic acidosis.
  • Cimetidine: can increase metformin plasma concentrations.
  • Alcohol: potentiates risk of lactic acidosis.
  • Diuretics that impair renal function: may reduce metformin clearance.

Moderate Interactions (Monitor Closely)

  • Sulfonylureas: increase risk of hypoglycaemia.
  • Beta‑blockers: may mask hypoglycaemic symptoms.
  • ACE inhibitors or ARBs: monitor renal function and electrolytes.
  • NSAIDs: can affect renal perfusion and metformin excretion.
  • Thiazolidinediones: combined use may raise lactic acidosis risk.

Frequently Asked Questions

Metformin is an oral antidiabetic medication indicated primarily for the management of type 2 diabetes mellitus. It helps lower blood glucose by decreasing hepatic glucose production, reducing intestinal absorption of glucose, and improving peripheral insulin sensitivity.

Metformin works by inhibiting mitochondrial complex I, which reduces the liver’s production of glucose. It also enhances insulin‑mediated glucose uptake in muscle and fat tissues and lowers the amount of glucose absorbed from the gut, leading to better overall glycaemic control.

The dosage of Metformin is individualized by the prescribing clinician based on the patient’s clinical condition, renal function, and response to therapy. The prescriber determines the appropriate strength, frequency, and titration schedule.

Metformin is classified as pregnancy category unknown in many regions. It may be used during pregnancy when the potential benefit outweighs the risk, but clinicians should evaluate each case. Limited data suggest it is excreted in breast milk; breastfeeding mothers should discuss risks with their healthcare provider.

To order Metformin, submit an enquiry on the product page at gnhindia.com specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details, and any necessary import documentation.

Metformin belongs to the biguanide class and is often preferred as first‑line therapy because it does not cause weight gain and has a low risk of hypoglycaemia when used alone. Compared with sulfonylureas, it has a different mechanism, fewer episodes of low blood sugar, and may provide cardiovascular benefits.

Metformin tablets should be stored at room temperature, below 25 °C, in the original packaging to protect them from moisture and light. Keep the container tightly closed and out of reach of children.

Metformin is taken orally, usually with meals to minimise gastrointestinal upset. Tablets should be swallowed whole with a full glass of water; they are not intended for crushing, chewing, or dissolving unless a specific formulation permits it.

The most serious risk is lactic acidosis, a rare but potentially fatal condition that can occur in patients with severe renal impairment, hepatic disease, or excessive alcohol intake. Prompt medical attention is required if symptoms such as rapid breathing, muscle pain, or abdominal discomfort develop.

Metformin is contraindicated in patients with severe renal dysfunction (eGFR < 30 mL/min/1.73 m²), acute or chronic metabolic acidosis, known hypersensitivity to the drug, and in those receiving radiographic contrast studies that may affect kidney function.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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