Zolgensma

The most common side effects with Zolgensma are raised liver enzymes, injury to the liver (hepatotoxicity), low levels of blood platelets (thrombocytopenia), raised levels of troponin (a measure which indicates damage to the heart muscle), fever and vomiting.

For the full list of restrictions and side effects of Zolgensma, see the package leaflet.

The main study of Zolgensma showed that a one-time infusion can improve survival in these patients and reduce the need for a permanent ventilator to breathe. It can also help them reach development milestones. As for its safety, the side effects of Zolgensma are considered manageable; the most common side effect in the study, raised liver enzymes, required treatment with a steroid. The European Medicines Agency therefore decided that Zolgensma’s benefits are greater than its risks and it can be authorised for use in the EU.

Zolgensma was originally given ‘conditional authorisation’ because there was more evidence to come about the medicine. As the company has supplied the additional information necessary, the authorisation has been switched from conditional to full authorisation.

Zolgensma is given once as an infusion (drip) into a vein lasting about 1 hour. The infusion should take place in a clinic or hospital under the supervision of a doctor experienced in managing spinal muscular atrophy.

Before and after receiving the infusion, the patient will have a number of tests, including liver and blood tests, and will be given corticosteroid medicines to reduce the risk of side effects. The medicine can only be obtained with a prescription. For more information about using Zolgensma, see the package leaflet or contact your doctor or pharmacist.

Patients with spinal muscular atrophy have a defect in a gene known as SMN1, which the body needs to make a protein essential for the normal functioning of nerves that control muscle movements. The active substance in Zolgensma, onasemnogene abeparvovec, contains a functional copy of this gene. When injected, it passes into the nerves from where it provides the correct gene to make enough of the protein and thereby restore nerve function.

A main study showed that Zolgensma reduces the need for artificial ventilation in babies with spinal muscular atrophy. In this study, 20 out of the 22 babies given Zolgensma were alive and breathing without a permanent ventilator after 14 months, when normally only a quarter of untreated patients would survive without needing a ventilator.

The study also showed that Zolgensma can help babies sit unaided for at least 30 seconds. 14 out of the 22 babies given Zolgensma were able to do so after 18 months, a milestone that is never achieved in untreated babies with severe forms of the disease.

The company that markets Zolgensma will provide educational materials to caregivers with information on how to use the medicine safely, the risks associated with the medicine and how to identify and report side effects. It will also conduct a study of the medicine’s safety and effectiveness in the long-term.

Recommendations and precautions to be followed by healthcare professionals and patients for the safe and effective use of Zolgensma have also been included in the summary of product characteristics and the package leaflet.

As for all medicines, data on the use of Zolgensma are continuously monitored. Side effects reported with Zolgensma are carefully evaluated and any necessary actions taken to protect patients.

Zolgensma received a conditional marketing authorisation valid throughout the EU on 18 May 2020. This was switched to a full marketing authorisation on 17 May 2022.

Further information on Zolgensma can be found on the Agency’s website: ema.europa.eu/medicines/human/EPAR/zolgensma

This overview was last updated in 08-2022.