Enzyme replacement therapy

Avalglucosidase alfa (أفالجلوكوزيداز ألفا)

Avalglucosidase alfa is a man-made version of an enzyme that people with Pompe disease lack. Pompe disease is a rare inherited condition in which a sugar store called glycogen builds up in the muscles and weakens them. It is given as a drip into a vein in a specialist centre.

This medicine is used under close medical supervision, usually by a specialist. Never start, stop or change it without your doctor.

What it is used for

  • Long-term treatment of Pompe disease (acid alpha-glucosidase deficiency)
  • Helping to preserve muscle strength and breathing function

How it is used

  • It is given as a slow drip into a vein in a hospital or specialist centre; your doctor works out the dose from your weight
  • You may be given medicines beforehand to reduce reactions, and you are watched during and after the infusion
  • Treatment is long term; do not miss infusion appointments and follow your doctor's plan

Possible side effects

  • Infusion reactions such as fever, chills, rash, itching or headache
  • Nausea, tiredness or muscle pain
  • Rarely, a severe allergic reaction with difficulty breathing, facial swelling or low blood pressure

Who should not use it

  • It is not given to people who have had a life-threatening allergic reaction to it, unless the specialist decides otherwise

Before and while using it

  • Tell the medical team straight away if you feel short of breath, swollen or dizzy during the infusion
  • People with severe heart or breathing weakness are at higher risk of problems during the infusion
  • The body can make antibodies against the medicine; your doctor may order tests to check for them

Medicine interactions

  • Tell your doctor or pharmacist about all your medicines, including herbal products and supplements

Pregnancy and breastfeeding

  • Tell your doctor if you are pregnant, planning a pregnancy or breastfeeding; the specialist decides about continuing treatment after weighing benefits and risks

How to store it

  • The hospital or pharmacy stores it in the fridge as the maker directs; it must not be frozen.

Get medical help straight away if

  • Your face, lips or tongue swell, or you find it hard to breathe.
  • You get a severe rash, blistering or peeling skin.
  • A side effect worries you or doesn’t go away: contact your doctor or pharmacist.

Questions about this medicine?

Talk to a doctor by video, or send your question by text.

Source: Standard international medicine references

This guide is general information and doesn’t replace advice from your doctor or pharmacist. Don’t start, stop or change a medicine without asking them, and always read the leaflet in the pack.