Metformin Hydrochloride Sandoz (Metformin Hydrochloride)

Metformin Hydrochloride is a biguanide used in the management of type 2 diabetes mellitus and related disorders.

• Type 2 diabetes mellitus: lowers fasting and post‑prandial blood glucose levels.
• Prediabetes (impaired glucose tolerance): reduces the risk of progression to overt diabetes.
• Polycystic ovary syndrome: improves insulin sensitivity and may help restore regular ovulation.

• Metformin Hydrochloride reduces hepatic gluconeogenesis, decreases intestinal absorption of glucose, and enhances peripheral insulin sensitivity by activating AMP‑activated protein kinase (AMPK), which modulates key enzymes involved in glucose production and utilization, leading to lower blood glucose concentrations.

Metformin Hydrochloride may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Diarrhea: loose stools, often early in therapy.
• Abdominal discomfort: cramping or bloating.
• Metallic taste: transient alteration of taste perception.
• Loss of appetite: reduced desire to eat.
• Upper respiratory tract infection: occasional cold‑like symptoms.

Serious or Rare Side Effects

• Lactic acidosis: rare but life‑threatening metabolic disturbance.
• Severe skin reactions: such as Stevens‑Johnson syndrome.
• Hepatotoxicity: liver enzyme elevations.
• Vitamin B12 deficiency: may develop with long‑term use.
• Hypoglycemia: when combined with other glucose‑lowering agents.
• Pancreatitis: inflammation of the pancreas.

Metformin Hydrochloride requires careful assessment of patient factors and monitoring to minimize risks.

• Renal function: evaluate eGFR before initiation and periodically thereafter.
• Hepatic disease: avoid in patients with severe liver impairment.
• Alcohol consumption: limit intake to reduce lactic acidosis risk.
• Concomitant medications: review drugs that may affect renal clearance or increase lactic acidosis.
• Pregnancy and lactation: assess risk‑benefit ratio before prescribing.
• Store at ambient temperature: keep in original container, protect from moisture and heat.

Metformin Hydrochloride can interact with several medicines, necessitating vigilance.

Major Interactions (Avoid)

• Iodinated contrast agents: may precipitate acute renal failure.
• Cimetidine: can increase metformin plasma concentrations.
• Nitrates: combined use may raise risk of lactic acidosis.
• Alcohol abuse: enhances lactic acidosis potential.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may mask symptoms of hypoglycemia.
• Diuretics: can affect renal clearance of metformin.
• ACE inhibitors or ARBs: monitor renal function and electrolytes.