Browse Conditions Browse Medicines

Information about Evoltra▼

What is it and what is it used for?

Evoltra is used to treat children and adults up to 21 years of age who have acute lymphoblastic leukaemia (ALL), which is a cancer of the lymphocytes (a type of white blood cell). It is used when the disease has not responded to or has come back (relapsed) after at least two other treatments, and when no other treatment is expected to work.

Because the number of patients with ALL is low, the disease is considered ‘rare’, and Evoltra was designated an ‘orphan medicine’ (a medicine used in rare diseases) on 5 February 2002.

How Evoltra works
The active substance in Evoltra, clofarabine, is a cytotoxic (a medicine that kills cells that are dividing, such as cancer cells). It belongs to the group of cancer medicines called ‘antimetabolites’. Clofarabine is an ‘analogue’ of adenine, which is part of the fundamental genetic material of cells (DNA and RNA). This means that clofarabine takes the place of adenine in the body, and interferes with the enzymes involved in making genetic material, called ‘DNA polymerase’ and ‘RNA reductase’. This stops the cells making new DNA and RNA, and slows down the growth of tumour cells.

How Evoltra is used
Evoltra is a cancer medicine that contains the active substance clofarabine. It is available as a concentrate that is made up into a solution for infusion (drip) into a vein.

Evoltra treatment should be started and supervised by a doctor who has experience in the management of patients with acute leukaemias. The recommended dose is 52 mg per square metre of body surface area (calculated using the patient’s height and weight). It is given by infusion lasting two hours every day for five days. The treatment should be repeated every two to six weeks. Most patients who respond to treatment do so after one or two treatment cycles.

For further information see the package leaflet.

What are the benefits?

Patients with ALL who have not responded to or who have relapsed after receiving at least two treatments have a very poor chance of survival. The European Medicines Agency concluded that Evoltra treatment may provide a way of obtaining remission, and of facilitating a stem cell transplant. The Agency decided that Evoltra’s benefits are greater than its risks and recommended that it be given marketing authorisation.

Evoltra has been authorised under ‘exceptional circumstances’. This means that, because the disease is rare, it has not been possible to obtain complete information about Evoltra. Every year, the European Medicines Agency will review any new information that may become available and this summary will be updated as necessary.

What are main side effects?

The most common side effects with Evoltra (seen in more than 1 patient in 10) were:
  • febrile neutropenia (low white blood cell counts with fever)
  • anxiety
  • headache
  • flushing (reddening of the face)
  • vomiting
  • diarrhoea
  • nausea (feeling sick)
  • palmar-plantar erythrodysaesthesia syndrome (rash and numbness on the palms and soles)
  • pruritus (itching)
  • pyrexia (fever)
  • mucosal inflammation (inflammation of the moist body surfaces, such as the lining of the mouth)
  • fatigue (tiredness)
For the full list of all side effects reported with Evoltra, see the package leaflet.

Who should avoid taking it?

Evoltra must not be given to patients with severe kidney or liver disease.

Breast-feeding should be stopped before, during and after treatment with Evoltra.

For the full list of restrictions, see the package leaflet.

What studies have been done?

Evoltra has been examined in one study of 61 patients below 21 years of age with ALL. All of the patients had previously received at least two other types of treatment but were not eligible for any other treatment. The average age of the treated patients was 12 years. The main measure of effectiveness was the number of patients who went into ‘remission’ (clearance of leukaemia from the bone marrow and complete or partial recovery of blood cell counts to normal levels). The study did not compare Evoltra with any other treatments.

In the main study, 20% of the patients went into remission (12 out of 61). Overall, the patients in the study survived for an average of 66 weeks.

After treatment with Evoltra, 10 patients were able to go on to have a stem-cell transplant. This is a complex procedure where the patient receives stem cells from a matched donor to help restore the bone marrow. Stem cells are cells that can develop into different types of cell.


Evoltra was first approved for use in the EU in 2006. It is manufactured by Sanofi.

European Medicines Agency website page for Evoltra (accessed 03/01/19)
Links available in External Resources

New medicines and vaccines that are under additional monitoring have an inverted black triangle symbol (▼) displayed in their package leaflet and summary of product characteristics, together with a short sentence explaining what the triangle means – it does not mean the medicine is unsafe. You should report all suspected adverse drug reactions (ADRs) for these products. ADRs can be reported by your doctor, pharmacist or online via the Yellow Card system.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions (side effects) after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals or patients are asked to report any suspected adverse reactions via the Yellow Card Scheme at or search for MHRA Yellow Card in the Google Play or Apple App Store.

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. We cannot provide individual medical advice. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.

For the full list of side effects and restrictions, see the package leaflet (link to package leaflet available in External Resources).