Metforminijev Klorid Lek (Metformin Hydrochloride)

Metformin Hydrochloride acts on glucose metabolism and is indicated for conditions within the antidiabetic therapeutic area.

• Type 2 diabetes mellitus: lowers elevated blood glucose by reducing hepatic glucose output and enhancing peripheral insulin sensitivity.
• Prediabetes (impaired glucose tolerance): helps delay progression to overt diabetes through modest glucose reduction.
• Polycystic ovary syndrome (off‑label): may improve insulin resistance and restore ovulatory function.

• Metformin Hydrochloride decreases hepatic gluconeogenesis, reduces intestinal glucose absorption, and increases peripheral glucose uptake by activating AMP‑activated protein kinase (AMPK). This results in lower circulating glucose levels and improved insulin sensitivity without directly stimulating insulin secretion.

Metformin Hydrochloride is associated with several adverse reactions that vary in frequency.

Common Side Effects

• Nausea: mild to moderate gastrointestinal discomfort.
• Diarrhea: loose stools, often transient.
• Abdominal pain: cramping or discomfort.
• Metallic taste: transient alteration of taste perception.
• Weight loss: modest reduction in body weight.
• Vitamin B12 deficiency: decreased absorption over long‑term use.

Serious or Rare Side Effects

• Lactic acidosis: rare but potentially fatal metabolic acidosis.
• Severe skin reactions: such as Stevens‑Johnson syndrome.
• Hepatic failure: marked liver enzyme elevation.
• Hypoglycemia: uncommon when used alone, more likely with concomitant insulin or sulfonylureas.
• Acute pancreatitis: very rare inflammatory condition of the pancreas.
• Anemia: due to reduced red blood cell production.

Metformin Hydrochloride requires careful patient assessment before and during therapy.

• Renal function: assess creatinine clearance; avoid if severe renal impairment.
• Hepatic function: monitor liver enzymes; use with caution in hepatic disease.
• Cardiovascular status: avoid in acute or chronic heart failure due to lactic acidosis risk.
• Elderly patients: start at lower dose and monitor for accumulation.
• Concomitant alcohol: limit intake to reduce lactic acidosis risk.
• Store at room temperature: keep in the original container, protect from moisture and heat.

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

Major Interactions (Avoid)

• Iodinated contrast agents: may precipitate acute renal failure and increase lactic acidosis risk.
• Cimetidine: can raise metformin plasma concentrations.
• Alcohol: potentiates risk of lactic acidosis.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may mask hypoglycemia symptoms.
• Diuretics: can affect renal clearance of metformin.
• ACE inhibitors/ARBs: monitor renal function and potassium.
• NSAIDs: may reduce renal perfusion, increasing metformin levels.
• Calcium channel blockers: occasional reports of altered glucose control.