Used for: Type 2 diabetes
Chinese name:

What is Janumet?

Janumet is a brand product that contains Sitagliptin and Metformin, which belongs to a class of medication called dipeptidyl peptidase IV (DPP-4) inhibitors and Biguanides. It works by making the pancreas produce more insulin and less glucagon to control blood sugar level, and reduce the body’s resistance to insulin. It is used for the treatment of type 2 diabetes mellitus.

How to use it?

Janumet is available as tablets and extended-release tablets. The daily dose depends on the severity and tolerability of the individual. 

The usual starting dose is 50/500mg twice daily. The maximum daily dose is 100/2000mg.

What are the side effects of Janumet?

Common side effects of Janumet include stomach discomfort, headache and upper respiratory infection. It does not cause weight gain.

Who should not take Janumet?

  • Anyone who is allergic to any component of Janumet, Sitagliptin and Metformin.

Pharmacist Tips:

  • Non-drug management, including diet and exercise, also plays an important role in controlling diabetes.
  • If your body is under stress such as fever, trauma, infection, or surgery, your dose requirement may change.

Common dosing schedule: 
Janumet is taken twice a day with food, in the morning and evening.

This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Janumet may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Janumet in Hong Kong?

In Hong Kong, Janumet is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Janumet in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Available dosage
  • 50/500mg / 50/1000mg / 100/1000mg (Extended-Release Tablets)
  • 50/500mg / 50/1000mg (Tablets)
Drug class
Antidiabetic Drugs
Sub class
Biguanides, Dipeptidyl Peptidase 4 (DPP-4) Inhibitors
Other drugs in same class