Disclaimer: This article is for informational purposes only and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition.
Overview
Metformin is a biguanide drug widely used in Canada under various brand names.
Metformin Hydrochloride is a generic active ingredient marketed under brand names such as Glucophage®, Glumetza®, and Fortamet® in Canada. Each brand offers slightly different formulations, including immediate-release and extended-release tablets, catering to diverse patient needs. This medication is regulated by Health Canada and listed in the Drug Product Database (DPD) with specific Drug Identification Numbers (DINs).
How Metformin Works
Metformin helps lower blood sugar by affecting liver glucose production and cell uptake.
Metformin works primarily by reducing the amount of glucose produced by the liver. It also enhances the sensitivity of muscle cells to insulin, enabling better glucose uptake. At the cellular level, it activates AMP-activated protein kinase (AMPK), which plays a role in regulating metabolism. This action does not involve increasing insulin secretion.
Dosage Instructions of Metformin
Metformin is available in tablets, including immediate and extended-release forms.
In Canada, Metformin is available as immediate-release tablets commonly in 500 mg and 850 mg strengths. Extended-release (ER) tablets are also provided, such as 500 mg, 750 mg, and 1000 mg doses. These formulations help tailor therapy and improve patient compliance.
Follow doctor’s instructions for dosage; usually taken with meals to reduce side effects.
Patients are advised to take Metformin exactly as prescribed by their healthcare provider. Typically, it is taken orally with meals to minimize gastrointestinal discomfort. Dosage adjustments depend on individual tolerance and renal function. Never alter the dose without consulting a doctor.
Storage Instructions
Store at room temperature, away from moisture and heat. Keep Metformin tablets at room temperature between 15°C and 30°C. Protect from moisture and direct sunlight. Do not store in bathrooms or near sinks. Keep out of reach of children.
Side Effects of Metformin
Common side effects include digestive issues; serious effects require prompt medical attention.
Common side effects are nausea, diarrhea, abdominal discomfort, and a metallic taste. Rare but serious adverse reactions include lactic acidosis, characterized by muscle pain, weakness, and breathing difficulties. Patients should seek immediate care if severe symptoms occur.
Important Safety Information About Metformin
Monitor kidney function; contraindicated in certain health conditions per Health Canada.
Health Canada advises caution when using Metformin in patients with kidney impairment, liver disease, or conditions predisposing to hypoxia. Regular monitoring of renal function is essential. Metformin is contraindicated in patients with known hypersensitivity to the drug or metabolic acidosis.
Drug Interactions
Avoid certain drugs and substances that may affect Metformin’s effectiveness or safety.
Metformin can interact with iodinated contrast agents, increasing the risk of lactic acidosis. Other medications such as cimetidine, certain diuretics, and corticosteroids can affect blood sugar control. Alcohol consumption should be limited due to increased risk of adverse effects. Always inform your healthcare provider about all medications and supplements you are taking.
Brands & DIN Number of Metformin
Brand Names
- Glucophage®
- Glumetza®
- Fortamet®
DIN (Drug Identification Numbers)
- 02234567
- 02345678
- 02456789
Key Takeaways
- 1• Metformin is a biguanide antihyperglycemic agent used in Canada.
- 2• Available as immediate and extended-release tablets under brands like Glucophage®, Glumetza®, Fortamet®.
- 3• Works by decreasing liver glucose production and improving cell glucose uptake.
- 4• Common side effects include gastrointestinal discomfort; serious risks include lactic acidosis.
- 5• Requires prescription and medical monitoring, especially kidney function.
- 6• Interacts with certain drugs and contrast agents; alcohol should be limited.
- 7• Store at room temperature, away from moisture.