Metformin + Sitagliptin is an oral anti-diabetic combination medication containing Metformin (a biguanide) and Sitagliptin (a DPP-4 inhibitor). It is used to improve glycaemic control in adults with type 2 diabetes mellitus as an adjunct to diet and exercise. This combination is typically prescribed when blood sugar levels are not adequately controlled by a single medicine alone. By combining two medicines with distinct yet complementary mechanisms, Metformin + Sitagliptin effectively lowers both fasting and post-meal blood glucose levels. It is primarily available as oral tablets, including immediate-release and extended-release (ER/XR) formulations.

Metformin + Sitagliptin is a prescription medicine used to help control blood sugar levels in adults with type 2 diabetes mellitus. It contains two active ingredients that work in complementary ways to improve glucose regulation.

Metformin belongs to the biguanide class. It lowers blood sugar by reducing glucose production in the liver, improving the body’s sensitivity to insulin, and slowing the absorption of sugar from food in the intestines. Sitagliptin is a dipeptidyl peptidase‑4 (DPP‑4) inhibitor. It increases the levels of natural incretin hormones, which help the pancreas release more insulin after meals and reduce the amount of glucose produced by the liver.

This combination is prescribed when diet, exercise, and single‑agent therapy are not sufficient to achieve adequate blood sugar control. By working together, Metformin and Sitagliptin may help lower blood sugar throughout the day, particularly after meals, and may reduce the risk of long‑term complications of type 2 diabetes, such as cardiovascular disease, chronic kidney disease, and diabetic neuropathy.

Your doctor will determine the most appropriate dose and formulation for your condition, and regular monitoring of blood sugar and kidney function is usually recommended during treatment.

Metformin + Sitagliptin may be indicated by your doctor for:

Type 2 Diabetes Mellitus

To improve blood sugar control in adults who are not sufficiently controlled on metformin or sitagliptin alone.

Replacement Therapy

For patients already stabilised on separate doses of metformin and sitagliptin.

Initial Therapy

In some clinical cases, the patient's baseline blood sugar levels are high enough to require dual therapy from the start.

Metformin + Sitagliptin may provide benefits such as:

• Dual‑action glucose-lowering that targets both liver glucose output and pancreatic insulin response

• Significant reduction in HbA1c, supporting achievement of target glycaemic goals

• Lower risk of hypoglycaemia compared to some other classes of diabetes medications, like sulfonylureas

• Weight‑neutral profile with minimal risk of weight gain

• Favourable safety record with good tolerability in most patients

• Simplified treatment schedule through a single combination tablet, available in immediate‑release and extended‑release (ER/XR) formulations

Metformin + Sitagliptin is generally well-tolerated, but side effects can occur, particularly during the initiation of therapy.

Common side effects of Metformin + Sitagliptin may include

• Stomach upset, nausea, or diarrhoea

• Mild headache

• Cold‑like symptoms such as a runny nose or sore throat

Uncommon side effects of Metformin + Sitagliptin may include

• Skin rash or itching

• Joint or muscle pain

• Changes in taste

• Mild swelling of hands or feet

Serious side effects that may require immediate medical attention include

• Lactic acidosis: a rare but serious build‑up of acid in the blood (symptoms may include severe tiredness, muscle pain, or difficulty breathing)

• Pancreatitis: inflammation of the pancreas (symptoms may include severe abdominal pain that may radiate to the back)

• Liver function changes: rare elevations in liver enzymes that may require monitoring

• Severe allergic reactions: swelling of the face, lips, or throat, or difficulty breathing

Always consult your doctor if you notice any unusual symptoms while taking Metformin + Sitagliptin.

Use Metformin + Sitagliptin exactly as directed by your doctor.

• Take the tablet with meals to help reduce the risk of stomach upset or diarrhoea

• Usually taken once or twice daily, depending on the formulation (immediate‑release or extended‑release) and your doctor’s advice

• Swallow the extended‑release (ER/XR) tablets whole. Do not crush, chew, or break them

• Try to take your medication at the same time each day to maintain consistency

• Regularly check your blood sugar as instructed by your healthcare provider

• Do not stop taking Metformin + Sitagliptin unless advised by your doctor

Metformin + Sitagliptin helps control blood sugar in type 2 diabetes by combining two medicines with different actions.

Metformin lowers the amount of glucose produced by the liver, improves the body’s sensitivity to insulin, and slows the absorption of sugar from food in the intestines.

Sitagliptin increases levels of natural hormones (incretins) that stimulate the pancreas to release more insulin after meals and reduce the amount of glucose made by the liver.

Together, these actions help maintain steadier blood sugar levels throughout the day, especially after eating, and support long‑term management of type 2 diabetes.

• Gastrointestinal side effects (like diarrhoea) are common when starting; they usually improve within a week or two as your body adjusts.

• Always carry a fast-acting sugar source (like glucose tablets or fruit juice) in case of a rare hypoglycaemic episode.

• If you are scheduled for an X-ray or CT scan involving iodinated contrast dye, you must temporarily stop this medication, as it can affect your kidneys.

• Regularly check your feet for sores or infections, as foot care is vital for anyone managing diabetes.

• Ensure you have your kidney function tested at least once a year while taking this medication.

Store Metformin + Sitagliptin at room temperature in a dry place away from direct sunlight and heat.

• Keep the tablets in their original container or blister pack.

• Do not store in the bathroom where moisture levels are high.

• Keep out of the reach of children and pets.

• Do not use after the expiry date.

• Alcohol (SEVERE): Drinking alcohol while taking Metformin + Sitagliptin may increase the risk of lactic acidosis. Your doctor will advise you to avoid or limit alcohol intake.

• Food intake (CONSULT YOUR DOCTOR): You should take Metformin + Sitagliptin with meals, as this may help reduce stomach upset and improve tolerability.

• High‑fat meals (MILD): Eating very high‑fat meals may worsen gastrointestinal side effects in some patients.

• Insulin or sulfonylureas (MODERATE): Using Metformin + Sitagliptin with insulin or sulfonylureas may increase the risk of hypoglycaemia. Your doctor may adjust your dose or monitor your blood sugar more closely.

• Iodinated contrast media (SEVERE): Metformin + Sitagliptin should be stopped before and after certain imaging procedures to protect kidney function. Your doctor will advise you when to restart the medicine.

• Diuretics (CAUTION): Diuretics may affect kidney function and increase the risk of lactic acidosis. Your doctor may monitor your kidney health if you are taking both medicines.

• ACE inhibitors and NSAIDs (CAUTION): These medicines may reduce kidney clearance and increase Metformin exposure. Your doctor may recommend monitoring.

• Kidney disease (SEVERE): Metformin + Sitagliptin may increase the risk of lactic acidosis in patients with reduced kidney function. Your doctor will guide you with dose adjustments or monitoring based on your individual condition.

• Liver disease (CAUTION): Impaired liver function may increase the chance of side effects. Your doctor may recommend regular monitoring.

• Heart failure (CAUTION): Patients with unstable or severe heart failure may have a higher risk of lactic acidosis. Your doctor will decide if Metformin + Sitagliptin is suitable for you.

• Pancreatic disease (SEVERE): Sitagliptin has been linked to rare cases of pancreatitis. If you have a history of pancreatic problems, your doctor will advise you carefully.

• Severe infections or dehydration (MODERATE): These conditions may increase the risk of lactic acidosis. Your doctor may temporarily adjust your treatment if needed.

Taking more than the prescribed dose of this medicine can be harmful. An overdose can cause severe stomach upset or lead to lactic acidosis and low blood sugar. If you suspect an overdose, contact emergency medical services or a poison control centre immediately.

Take the missed dose as soon as you remember with food. If it is almost time for your next dose, skip the missed one and return to your regular schedule. Do not take two doses at the same time to make up for a missed application.