Metformin Glycomet Glucophage Medications

Metformin Info

What is Metformin?

Metformin belongs to the biguanide family of medicines. It is mainly used to help control high blood sugar levels in people with type 2 diabetes. You will find metformin as the active ingredient in a range of tablets and fixed-dose combinations sold in Hong Kong, such as Glycomet, Glucophage, Istamet and several others.

Medicines that contain Metformin

In Hong Kong you can obtain metformin in many brands and strengths. The most common products are:

• Glycomet - metformin tablets, available in 500 mg and 850 mg strengths.
• Glucophage - the original brand, offered as immediate-release and extended-release tablets.
• Istamet - another branded tablet, typically 500 mg or 850 mg.
• Metformin - the simple generic name used for many unbranded tablets.
• Glucovance - a fixed-dose combination of metformin and a sulfonylurea (glibenclamide).
• Jentadueto - combines metformin with the DPP-4 inhibitor linagliptin.
• Actoplus Met - metformin paired with the sulfonylurea glimepiride.
• Kombiglyze XR - an extended-release tablet that pairs metformin with saxagliptin.
• Metformin + Glyburide - a combination product containing metformin and the sulfonylurea glyburide.

These medicines come as tablets that you swallow whole, and some are available as extended-release forms that release the drug more slowly. The generic versions are usually less expensive than the branded ones, but they contain the same active ingredient.

Conditions that Metformin Helps Treat

Metformin is approved for several diabetes-related uses:

• Type 2 diabetes - lowers blood glucose by improving the way the body uses insulin.
• Prediabetes - may be prescribed to delay the progression to full-blown diabetes in people with elevated blood sugar but not yet meeting diagnostic criteria.
• Polycystic ovary syndrome (PCOS) - sometimes used to help regulate menstrual cycles and improve insulin resistance, though this is an off-label use.
• Gestational diabetes - on rare occasions, metformin may be considered when insulin is not suitable, but this decision is made by a specialist.

The drug works best when paired with a healthy diet and regular physical activity, which are part of the overall management plan for these conditions.

How Metformin Works

Metformin helps the liver release less glucose and makes muscle cells take up more glucose from the bloodstream. This dual action reduces overall blood sugar levels without causing the body to produce excess insulin. Because it does not stimulate insulin release directly, it usually does not cause low blood sugar (hypoglycaemia) when used alone.

Safety and Side Effects

Common Side Effects

• Mild stomach upset, such as nausea or loss of appetite.
• Loose stools or occasional diarrhea, especially when first starting the medicine.
• A metallic taste in the mouth, which often fades with continued use.

These effects are generally short-lived and may improve if the tablet is taken with food.

Serious Reactions

• Lactic acidosis - a rare but serious condition where lactic acid builds up in the blood. Warning signs include unusual muscle pain, rapid breathing, feeling cold, or severe weakness.
• Severe skin rash or swelling of the face, lips, or throat, which could indicate an allergic reaction.

If any of these signs appear, seek medical help right away.

Who Should Be Cautious

• People with significant kidney problems, as reduced kidney function can increase the risk of lactic acidosis.
• Those with liver disease, heart failure, or a history of metabolic acidosis.
• Pregnant or breastfeeding individuals should discuss the risks and benefits with a healthcare professional before using metformin-containing products.

Interaction Awareness

• Alcohol - drinking large amounts while taking metformin can raise the chance of lactic acidosis.
• Other diabetes medicines - combination products (e.g., Glucovance, Jentadueto) already contain additional agents; adding more glucose-lowering drugs may increase the risk of low blood sugar.
• Contrast dyes used in certain imaging studies can affect kidney function; inform your doctor if you need a scan that involves iodine-based contrast.
• Certain heart or blood pressure medications may interact, so always share your full medication list with your pharmacist or doctor.

For detailed interaction lists, refer to the specific product information for each medicine.

Things to Remember Before You Start

Store metformin tablets in a cool, dry place away from direct sunlight. Extended-release tablets should not be crushed or chewed, as this can change how the drug is released. Treatment length varies; some people use it long-term, while others may only need it for a short period. Always read the label that comes with your specific product and follow the instructions given by your healthcare provider. For detailed usage, dosing, and administration, refer to your individual medication’s information.

Key Terms

Biguanide: The drug class that includes metformin, used to lower blood sugar.

Extended-release: A formulation that releases the medicine slowly over several hours, allowing once-daily dosing for some products.

Sulfonylurea: A type of diabetes medicine that stimulates the pancreas to release more insulin; often combined with metformin in fixed-dose tablets.

DPP-4 inhibitor: A class of drugs that help the body keep blood sugar stable; sometimes paired with metformin in combination products.

Information Disclaimer

This article offers general educational information about metformin as an active substance used in various medicines. Its purpose is to help patients better understand the ingredient and the conditions it is used to treat. It is not a substitute for professional medical advice or for the specific instructions provided with individual products. Medicines containing metformin may differ in formulation, strength, and directions for use. Always consult the labeling of your particular medication and follow your healthcare provider’s guidance for complete information on proper use, dosage, and safety.