Drug

BESPONSA®

inotuzumab ozogamicin

Besponsa Overview

This is a summary of the European public assessment report (EPAR) for Besponsa. It explains how the Agency assessed the medicine to recommend its authorisation in the EU and its conditions of use. It is not intended to provide practical advice on how to use Besponsa.

For practical information about using Besponsa, patients should read the package leaflet or contact their doctor or pharmacist.

Besponsa is a cancer medicine used to treat a type of blood cancer which affects B cells (a type of white blood cells) called B-cell precursor acute lymphoblastic leukaemia (ALL). Besponsa is used on its own in adults whose cancer has come back or did not respond to previous treatment.

Besponsa is only used in patients with ‘CD22-positive B-cell precursor ALL’. This means that patients’ have a particular protein (CD22) on the surface of their white blood cells. In patients who have a type of chromosome known as Philadelphia-chromosome, treatment with a cancer medicine called a tyrosine kinase inhibitor should have been tried before starting Besponsa.

Because the number of patients with B-cell precursor ALL is low, the disease is considered ‘rare’, and Besponsa was designated an ‘orphan medicine’ (a medicine used in rare diseases) on 7 June 2013.

Besponsa contains the active substance inotuzumab ozogamicin.

Besponsa is given as an infusion (drip) into a vein lasting for at least one hour. The infusions are given on days 1, 8 and 15 of a 3 or 4 week treatment cycle. The doctor may interrupt treatment or reduce the dose, if the patient develops certain serious side effects.

Patients in whom Besponsa works well should receive 2 or 3 cycles, after which they can have a stem cell transplant to replace their bone marrow, the only curative treatment. Patients whose treatment works well, but who are not going to receive a stem cell transplant, may receive up to a maximum of 6 cycles of treatment. In patients who do not respond to treatment, Besponsa should be stopped after 3 cycles.

Besponsa can only be obtained with a prescription, and treatment should be given under the supervision of a doctor who has experience in the use of cancer treatments.

For further information, see the package leaflet.

The active substance in Besponsa, inotuzumab ozogamicin, is a monoclonal antibody (a type of protein) that has been linked to a small molecule, N-acetyl-gamma-calicheamicin dimethylhydrazide. The monoclonal antibody has been designed to recognise and attach to CD22 on the cancerous B cells. Once attached, the medicine is taken up by the cell where calicheamicin becomes active, causing breaks in the cell’s DNA and thereby killing the cancer cell.

Besponsa was shown to be more effective than other chemotherapy (medicines to treat cancer) in one main study involving 326 adults with CD22-positive B-cell precursor ALL, which had come back or had not responded to previous treatment. The main measure of effectiveness was response to treatment. Patients were considered to have responded if they had no remaining cancerous B cells in their blood and bone marrow after treatment.

An analysis of the first 218 patients treated showed that after at least 2 cycles of treatment, 81% (88 out of 109) of patients receiving Besponsa responded to treatment compared with 29% (32 out of 109) of patients receiving other chemotherapy. Patients who responded to treatment could proceed to have a stem cell transplant.

The Agency’s Committee for Medicinal Products for Human Use (CHMP) decided that Besponsa’s benefits are greater than its risks and recommended that it be approved for use in the EU.

The CHMP considered that although there have been recent advances in the treatment of B-cell precursor ALL, treatment options for patients remain limited. The main study showed that Besponsa was better than other commonly used chemotherapy medicines at inducing a response in patients and allowing them to have a curative stem cell transplant.

With regard to safety, the side effects with Besponsa are similar to those of other chemotherapy medicines and can usually be managed by dose reduction or treatment interruption.

The European Commission granted a marketing authorisation valid throughout the European Union for Besponsa on 29 June 2017.

For more information about treatment with Besponsa, read the package leaflet (also part of the EPAR) or contact your doctor or pharmacist.

What are the risks associated with Besponsa?

Owner of copyright and other intellectual property rights to European Medicines Agency

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