Metformin

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 USA supplies Metformin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

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.

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.

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.

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.