Metformin Hydrochloride Rosemont (Metformin Hydrochloride)

Metformin Hydrochloride is used in the management of disorders related to glucose metabolism, primarily type 2 diabetes mellitus.

• Type 2 diabetes mellitus: improves glycemic control and reduces HbA1c levels.
• Prediabetes (impaired glucose tolerance): helps normalize fasting glucose and delays progression to diabetes.
• Polycystic ovary syndrome (PCOS): improves insulin resistance and may aid menstrual regularity.

• Metformin Hydrochloride acts primarily by inhibiting hepatic gluconeogenesis, thereby decreasing hepatic glucose production. It also reduces intestinal absorption of glucose and enhances peripheral insulin sensitivity, facilitating greater glucose uptake by muscle and adipose tissue. These combined actions lower circulating blood glucose without directly stimulating insulin secretion.

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: frequent loose stools, especially at treatment initiation.
• Abdominal discomfort: cramping or bloating.
• Metallic taste: transient alteration in taste perception.
• Loss of appetite: reduced desire to eat.
• Vitamin B12 deficiency: decreased absorption with long‑term use.

Serious or Rare Side Effects

• Lactic acidosis: rare but life‑threatening metabolic acidosis.
• Severe skin reactions: such as Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Hepatotoxicity: liver enzyme elevations or injury.
• Hypoglycemia: when combined with other glucose‑lowering agents.
• Pancreatitis: inflammation of the pancreas.
• Severe gastrointestinal intolerance: persistent vomiting or abdominal pain.

When prescribing Metformin Hydrochloride, clinicians should consider several safety factors.

• Renal function: assess eGFR before initiating and periodically thereafter.
• Hepatic function: monitor liver enzymes in patients with liver disease.
• Lactic acidosis risk: avoid in patients with hypoxia, severe infection, or acute heart failure.
• Pregnancy: use only if potential benefit justifies potential risk to the fetus.
• Alcohol intake: limit consumption as it may increase lactic acidosis risk.
• Store at ambient temperature: keep in the original packaging, protect from moisture and heat.

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

Major Interactions (Avoid)

• Iodinated radiographic contrast agents: may precipitate acute renal failure and lactic acidosis.
• Cimetidine: can increase metformin plasma concentrations.
• Other biguanides: additive risk of lactic acidosis.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may mask hypoglycemia symptoms.
• Diuretics (especially thiazides): can affect renal function and electrolyte balance.
• ACE inhibitors or ARBs: monitor renal function and potassium levels.
• Corticosteroids: may raise blood glucose, requiring dose adjustment.
• Thyroid hormones: may alter glucose metabolism.