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What is Janumet?

Janumet is an oral prescription medicine that helps lower blood sugar levels in adults with type 2 diabetes. The tablets contain two prescription medicines, Sitagliptin and Metformin.

What is it used for?

Janumet is used alongside a healthy diet and regular exercise to regulate blood sugar levels in adults with type II diabetes.

How does the drug work?

Janumet lowers your blood sugar levels by helping your pancreas make more insulin, helping your body more effectively use the insulin that it makes, and helping to decrease excess sugar that your liver makes. Each tablet contains a combination of two antidiabetic drugs, Sitagliptin and Metformin. These two medicines work together to help you better regulate your blood sugar levels. Sitagliptin belongs to a group of medicines called DPP-4 inhibitors (dipeptidyl peptidase-4 inhibitors), which help improve your level of insulin when your blood sugar level is too high, especially after a meal. Sitagliptin also helps you decrease the amount of sugar made by your body and is unlikely to cause low blood sugar (hypoglycemia), a common side effect of antidiabetic drugs. Metformin belongs to a group of medicines called biguanides, and it helps you lower the amount of sugar made by your liver. Together, these medicines help you to achieve your goal of better blood sugar control.

How to take this medication

The drug can be taken:

  • alone, if you are not already taking Metformin or any combination of Sitagliptin and Metformin.
  • in combination with a Sulfonylurea drug if you are not already taking Metformin with a Sulfonylurea medication.
  • with a premixed or long-to-intermediate-acting insulin.
  • in combination with Pioglitazone if you are not already taking Metformin and Pioglitazone.

Janumet should be taken with meals to lower your chance of having an upset stomach. Swallow the tablets whole, without breaking or cutting the tablets before swallowing. Continue to take it for as long as your doctor tells you. It is important not to miss any doses.


Dosing can be different for different people. Make sure that you take your medicine exactly as your doctor prescribed it to you. Your dose will most likely be individualized to you, based on your current lifestyle, your tolerability, and the drug’s effectiveness.

The maximum recommended dose is Metformin 2000mg and Sitagliptin 100mg, taken orally, every day. If you are currently not being treated with Metformin, a typical dose is 500mg of Metformin and 50mg of Sitagliptin, orally, twice a day. If you are currently being treated with metformin, a typical dose is 50mg of Sitagliptin with your current Metformin dose, taken orally, twice a day. 1000Mg of Metformin and 50mg of Sitagliptin, taken orally, twice a day is recommended for people who are already taking a high daily dose of Metformin.

Warnings and Precautions

Before you begin taking Janumet, tell your doctor if you:

  • Have or have had pancreatitis (inflammation of your pancreas).
  • Have or have had severe kidney problems.
  • Have or have had liver problems.
  • Have or have had heart problems, including congestive heart failure.
  • Drink alcohol very often, or drink a lot of alcohol in a short-term (“binge” drinking).
  • Need to get an injection of dye or contrast agents for an imaging or scanning procedure. Your dosing may need to be stopped for the time being.
  • Have any other medical conditions.
  • Are currently pregnant or plan to become pregnant. It is not clear if Janumet can harm your unborn baby. If you are pregnant or planning to become pregnant, make sure to talk with your doctor about what the best way to control your blood sugar levels are while you are pregnant.
  • Are breast feeding or are planning to breastfeed. It is not clear if the drug passes into your breast milk. Talk with your doctor about options for the best way to feed your baby while you are taking Janumet.

Stop taking it immediately if you get the following symptoms of lactic acidosis:

  • You feel tired and very weak.
  • You have unusual muscle pains.
  • You have problems with breathing.
  • You have stomach pain, along with nausea and vomiting or diarrhea.
  • You feel cold, specifically in your arms and legs.
  • You feel dizzy or lightheaded.
  • You develop a slow or irregular heartbeat.
  • Your medical condition abruptly changes.

Cases of pancreatitis (inflammation of the pancreas), which may be severe and lead to death, have been reported in some patients.

Cases of a skin condition called bullous pemphigoid that can require hospital treatment have been documented in some patients, as well. Let your doctor know immediately if you begin to develop blisters or any breakdown of your skin (erosion). Your doctor might tell you to stop taking Janumet or to modify your dose.

Janumet side effects

Common negative effects may include:

  • lactic acidosis
  • stuffy or runny nose, and sore throat
  • upper respiratory infection
  • low blood sugar (hypoglycemia) when used in combination with certain drugs, such as insulin or a Sulfonylurea
  • gas, upset stomach, indigestion
  • weakness
  • vomiting and nausea
  • headache
  • diarrhea

Uncommon negative effects may include:

  • anxiety
  • blurred vision
  • chills
  • confusion
  • cool, pale skin
  • dizziness
  • fast heartbeat
  • headache
  • increased hunger
  • seizures
  • shakiness
  • slurred speech

Talk to your health care provider about any side effect that bothers you or does not go away. These are not all the possible side effects. Call your doctor for medical advice about side effects.

What is Janumet?

Janumet is a prescription-only medicine developed by Merck. Consisting of both sitagliptin and metformin HCI as its active ingredients, Janumet is a combination drug designed to treat diabetes mellitus. Chemically, sitagliptin belongs to a class of drugs known as dipeptidyl peptidase-4 enzyme inhibitors. Metformin, on the other hand, is a type of biguanide. Through the inhibition of DPP-4 enzymes, Janumet prevents incretin from being inactivated. This helps to increase its duration of action. At the same time, Janumet effectively lowers both postprandial and basal plasma glucose, leading to an enhanced glucose tolerance.

What is it used for?

Part of a bigger treatment plan, Janumet is typically used in conjunction with diet, exercise or other non-pharmacological interventions. To ensure treatment success, it is important that patients use this drug exactly as directed (including following any lifestyle recommendations made by the doctor). Janumet is not recommended for patients who have type 1 diabetes (or diabetic ketoacidosis). In addition, it is not advisable to use this drug if you have a history of pancreatitis. While using Janumet, they may have a higher risk of developing the disease. The safety and efficacy of Janumet in pediatrics have yet to be established. Therefore, the use of Janumet should be avoided in patients under 18 years old.

Why use it?

Consisting of two potent active ingredients, the combination drug allows for a simplified dosing regimen (potentially improving patient adherence).

What is Janumet?

Janumet is an antidiabetic medicine that contains two different active ingredients: metformin HCl and sitagliptin. Sitagliptin is a type of dipeptidyl peptidase-4 (DPP-4) enzyme inhibitor, while metformin HCl is an antihyperglycemic agent pharmacologically (and chemically) unrelated to any other types of diabetes drugs. Sitagliptin is able to slow the inactivation of incretin, thereby prolonging its actions. On the other hand, metformin helps increase peripheral uptake (and utilization) of glucose, thereby improving insulin sensitivity. Janumet 50mg/500mg comes in the form of film-coated tablets. Formulations in higher doses are also available. This diabetes drug is only available by prescription. Janumet is a product of the US-based Merck.

What is it used for?

Janumet is indicated for the treatment of type II diabetes. It helps adult patients with elevated blood sugar levels to enhance their glycemic control. Be aware that Janumet is not effective in treating diabetic ketoacidosis or type I diabetes mellitus. Use Janumet cautiously if you previously have had pancreatitis. For optimal treatment outcomes, this drug should be used in combination with diet or exercise. While using Janumet, patients should closely follow lifestyle recommendations made by the doctor (which are essential to treatment success). In general, Janumet is intended for use in adult patients only.

Why use it?

Janumet effectively enhances glycemic control in adults who suffer from type II diabetes. Containing both sitagliptin and metformin, it eliminates the inconvenience of taking two separate medications.