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

Metformin

Active Ingredient:
Metformin Hydrochloride
Origin:
EU

Metformin (Metformin Hydrochloride)

Metformin Hydrochloride, the active ingredient in Metformin, is a biguanide presented as an oral tablet for oral use. It is used to lower blood glucose in adults with type 2 diabetes mellitus and is also employed off‑label for conditions associated with insulin resistance. The product conforms to EU pharmacopeial specifications and undergoes rigorous quality testing before distribution.

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 an oral antidiabetic agent indicated for several glucose‑related disorders.

  • Type 2 diabetes mellitus: improves glycemic control by lowering fasting and post‑prandial glucose levels.
  • Polycystic ovary syndrome (off‑label): helps restore ovulatory cycles and reduce insulin resistance.
  • Gestational diabetes (off‑label): may be used when insulin is not suitable to control maternal hyperglycemia.

How It Works

  • Metformin reduces hepatic gluconeogenesis, decreases intestinal absorption of glucose, and enhances peripheral insulin sensitivity by increasing glucose uptake in muscle and adipose tissue. It activates AMP‑activated protein kinase (AMPK), which modulates metabolic pathways involved in glucose and lipid homeostasis.

Side Effects

Metformin may cause a range of adverse reactions, which are grouped by frequency.

Common Side Effects

  • Gastrointestinal upset: nausea, abdominal discomfort, and loss of appetite.
  • Diarrhea: frequent loose stools, especially during dose titration.
  • Metallic taste: transient alteration of taste perception.
  • Decreased vitamin B12 absorption: mild deficiency with long‑term use.

Serious or Rare Side Effects

  • Lactic acidosis: rare but potentially fatal accumulation of lactate.
  • Severe skin reactions: such as Stevens‑Johnson syndrome or toxic epidermal necrolysis.
  • Hepatic dysfunction: elevated liver enzymes or hepatitis.
  • Vitamin B12 deficiency: may lead to neuropathy if untreated.
  • Hypoglycemia: when combined with insulin or sulfonylureas.

Precautions & Warnings

When prescribing Metformin, clinicians should consider several safety measures.

  • Renal function: assess eGFR before initiation and periodically thereafter.
  • Hepatic function: evaluate liver enzymes, especially in patients with known disease.
  • Vitamin B12 status: monitor levels during long‑term therapy.
  • Heart failure: avoid in patients with severe congestive heart failure.
  • Elderly patients: start at lower dose and titrate cautiously.
  • Store at room temperature: keep in original container, protect from moisture and heat.

Avoid Interactions

Metformin interacts with several medicines; some require avoidance while others need close monitoring.

Major Interactions (Avoid)

  • Iodinated contrast media: risk of acute renal failure and lactic acidosis.
  • Alcohol: potentiates lactic acidosis, especially with chronic intake.
  • Cimetidine: may increase metformin plasma concentrations.

Moderate Interactions (Monitor Closely)

  • Sulfonylureas: increased risk of hypoglycemia; dose adjustment may be needed.
  • Beta‑blockers: may mask hypoglycemia symptoms.
  • ACE inhibitors and ARBs: may affect renal function; monitor creatinine.
  • Warfarin: occasional alteration of INR; check coagulation status.

Frequently Asked Questions

Metformin is primarily prescribed to improve blood‑sugar control in adults with type 2 diabetes mellitus. It is also used off‑label for conditions linked to insulin resistance, such as polycystic ovary syndrome and, in some cases, gestational diabetes when insulin therapy is not feasible.

Metformin lowers glucose levels by inhibiting hepatic glucose production, reducing intestinal glucose absorption, and enhancing peripheral insulin sensitivity. It activates the enzyme AMP‑activated protein kinase (AMPK), which regulates metabolic pathways that control glucose and lipid metabolism.

The exact dose of Metformin is individualized by the prescribing clinician based on the patient’s renal function, glycemic targets, and tolerability. Typical regimens start with a low dose that is gradually increased, but the final dosage is determined by the healthcare provider.

Data on Metformin use in pregnancy are limited, and it is generally not the first‑line therapy for gestational diabetes. Breastfeeding mothers should discuss potential risks with their physician, as Metformin does pass into breast milk in small amounts.

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

Compared with sulfonylureas, Metformin does not cause insulin‑mediated hypoglycemia and often promotes modest weight loss. Unlike insulin, it is taken orally and does not require injection. It is frequently combined with other agents when monotherapy does not achieve glycemic targets.

Metformin tablets should be stored at room temperature, below 25 °C, in their original packaging. Keep them away from moisture, direct sunlight, and excessive heat to maintain product stability.

Metformin is taken orally, usually with meals to reduce gastrointestinal discomfort. Tablets should be swallowed whole with a full glass of water and not crushed or chewed unless a specific formulation permits it.

The most critical adverse effect 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 individuals with severe renal dysfunction (eGFR < 30 mL/min/1.73 m²), acute or chronic metabolic acidosis, known hypersensitivity to the drug, and patients with severe congestive heart failure. Clinicians should evaluate each patient’s medical history before initiating therapy.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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