Metformina Generis (Metformin Hydrochloride)

Metformina Generis, a Biguanide, is employed in the management of disorders related to insulin resistance and hyperglycaemia.

• Type 2 diabetes mellitus: improves glycaemic control by lowering fasting and post‑prandial blood glucose.
• Prediabetes: helps delay progression to overt diabetes by enhancing insulin sensitivity.
• Polycystic ovary syndrome (PCOS): reduces insulin resistance and may improve menstrual regularity.

• Metformin primarily inhibits mitochondrial respiratory-chain complex I, decreasing hepatic gluconeogenesis and lowering glucose output. It also enhances peripheral glucose uptake by activating AMP‑activated protein kinase (AMPK), which improves insulin sensitivity in muscle and adipose tissue, without stimulating insulin secretion.

Metformina Generis may be associated with a range of adverse reactions.

Common Side Effects

• Gastrointestinal upset: nausea, abdominal discomfort, or indigestion.
• Diarrhoea: loose stools, often transient.
• Metallic taste: altered taste perception.
• Weight loss: modest reduction in body weight.

Serious or Rare Side Effects

• Lactic acidosis: rare but potentially fatal metabolic disturbance.
• Severe hypoglycaemia: usually when combined with other glucose‑lowering agents.
• Vitamin B12 deficiency: may develop with long‑term use.
• Hepatic dysfunction: abnormal liver enzymes or hepatitis.
• Allergic skin reactions: rash, urticaria, or Stevens‑Johnson syndrome.
• Pancreatitis: inflammation of the pancreas.

Before initiating Metformina Generis, several safety considerations should be reviewed.

• Renal function: assess creatinine clearance and avoid use in severe renal impairment.
• Liver disease: contraindicated in patients with significant hepatic dysfunction.
• Cardiac failure: use with caution in congestive heart failure.
• Alcohol consumption: limit intake as it may increase risk of lactic acidosis.
• Vitamin B12 monitoring: periodic assessment recommended for long‑term therapy.
• Store at ambient temperature: keep in the original container, protect from moisture and heat.

Metformina Generis can interact with several medicines, requiring attention to avoid adverse outcomes.

Major Interactions (Avoid)

• Iodinated contrast agents: may precipitate acute renal dysfunction.
• Cimetidine: can increase metformin plasma concentrations.
• Alcohol: potentiates risk of lactic acidosis.
• Nucleoside reverse transcriptase inhibitors: may raise metformin exposure.
• Loop or thiazide diuretics: can affect renal clearance of metformin.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may mask symptoms of hypoglycaemia.
• ACE inhibitors or ARBs: monitor renal function and electrolytes.
• Sulfonylureas: increased risk of hypoglycaemia when combined.
• Corticosteroids: may reduce glucose‑lowering efficacy.
• Thyroid hormones: may alter glycaemic control requiring dose adjustment.