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Denosumab (Prolia, Xgeva)

Read about denosumab, how you have it and other important information about taking this cancer drug. 

Denosumab (pronounced den-oh-sue-mab) is a type of targeted therapy called a monoclonal antibody. It is made in the laboratory to recognise and find specific proteins on the outside of some cells. Denosumab is also known by its brand names, Xgeva and Prolia. 

It helps to prevent fractures and other cancer related bone problems in adults with cancer that has spread to the bones.

Prolia can reduce the risk of spinal fractures in men who have weakened bones due to hormone therapy for prostate cancer.

It also helps to slow down bone damage in people who have giant cell tumour of the bone (a non cancerous type of bone tumour).  

How it works

In healthy bones, specialised cells constantly break down and replace old tissue. These specialised bone cells are:

  • osteoclasts, which break down old bone
  • osteoblasts, which build new bone

This process is called bone remodelling and is very well controlled. There is a fine balance between the rates of bone breakdown and growth, which keeps bones strong and healthy.

Denosumab works by targeting a protein called RANKL which controls the activity of osteoclasts. This stops bone cells being broken down and strengthens the bone.

How you have it

You have denosumab as an injection just below the skin (subcutaneously).

When you have it

How often you have denosumab depends on the brand.

You have Xgeva every 4 weeks. If you have giant cell tumour of the bone you have an extra dose 1 week and 2 weeks after the first dose.

You have Prolia every 6 months.

Tests during treatment

You have blood tests before starting treatment and regularly during your treatment. The tests check your levels of calcium and other chemicals in the blood.

Side effects

Important information

Other medicines, foods and drink

Cancer drugs can interact with some other medicines and herbal products. Tell your doctor or pharmacist about any medicines you are taking. This includes vitamins, herbal supplements and over the counter remedies.


This drug contains a type of sugar called sorbitol. If you have an intolerance to some sugars, ask your doctor if it is safe for you to take this drug.

Pregnancy and contraception

This drug may harm a baby developing in the womb. It is important not to become pregnant or father a child while you are having treatment with this drug and for at least 5 months afterwards. Talk to your doctor or nurse about effective contraception before starting treatment.


It is unknown whether this treatment affects fertility in people. Talk to your doctor before starting treatment if you think you may want to have a baby in the future.


Don’t breastfeed during this treatment because the drug may come through into your breast milk.

Treatment for other conditions

Always tell other doctors, nurses, pharmacists or dentists that you’re having this treatment if you need treatment for anything else, including teeth problems.

More information about this treatment

For further information about this treatment go to the electronic Medicines Compendium (eMC) website.

You can report any side effect you have to the Medicines Health and Regulatory Authority (MHRA) as part of their Yellow Card Scheme.

Information and help

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