An injection that lowers oxalate production in PH1
Lumasiran
An under-the-skin injection used to treat primary hyperoxaluria type 1 by reducing how much oxalate the liver makes.
What is Lumasiran?
Lumasiran is a specialist medicine used to treat primary hyperoxaluria type 1, a rare inherited condition in which the liver makes too much of a substance called oxalate, which can damage the kidneys. It is a type of RNA interference (siRNA) therapy that lowers the body's production of oxalate. It is given as an injection under the skin on a regular schedule by the specialist team. The most common side effect is a reaction where the injection is given. It treats the underlying overproduction rather than curing the condition.
Education and reference only. This is a plain-language guide to Lumasiran — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Lumasiran is a medicine used to treat primary hyperoxaluria type 1, an inherited condition in which the liver overproduces a substance called oxalate. The excess oxalate can form crystals and stones that damage the kidneys and, over time, build up elsewhere in the body. Lumasiran is a type of RNA interference (siRNA) therapy, a newer kind of medicine that dials down the production of a specific protein. It is given as an injection under the skin on a regular schedule and is prescribed and supervised by a specialist service.
How it works
In primary hyperoxaluria type 1, the liver makes far too much oxalate. Lumasiran works by quietening down a particular instruction inside liver cells (a piece of genetic messaging), so the liver makes less of an enzyme that drives oxalate production. With less of this enzyme, the liver produces less oxalate, lowering the amount that reaches the kidneys and reducing the harm it can cause. Because the effect builds up and then needs topping up, it is given on a regular schedule rather than as a one-off.
Company & origin
Originated / developed by: Specialist manufacturer.
A specialist injection used in the UK to treat primary hyperoxaluria type 1, an inherited condition that overproduces oxalate.
Practical use
How to take Lumasiran
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Have the injection under the skin on the regular schedule your specialist team arranges.
- Keep up any other kidney-protecting measures you are advised, such as staying well hydrated.
- Attend your appointments so the team can monitor oxalate levels and kidney function.
- Tell your team about any troublesome reactions where the injection is given.
- Continue treatment as planned, as this is a long-term therapy rather than a one-off.
Weighing it up
Advantages & disadvantages of Lumasiran
Advantages
- Reduces how much oxalate the liver makes, tackling primary hyperoxaluria type 1 at its source.
- Given as an injection under the skin on a spaced-out schedule.
- Helps protect the kidneys from the damage caused by excess oxalate.
Disadvantages
- Commonly causes reactions where the injection is given.
- Treats the condition rather than curing it, so it is needed long term.
- Requires regular injections and specialist monitoring.
Practical use
Good to know
The key idea behind lumasiran is that it tackles the problem at its source by lowering how much oxalate the liver makes, rather than just managing the stones and crystals afterwards. It is given as an injection under the skin on a regular, spaced-out schedule set by the specialist team, who will explain how often it is needed. The most common side effects are reactions where the injection is given, such as redness, pain or swelling, which usually settle on their own. It is used alongside other measures that protect the kidneys, such as keeping well hydrated, as advised by the specialist team. The team monitors how well it is working, including checking oxalate levels and kidney function over time. It treats the condition rather than curing it, so it is a long-term treatment.
Who should not take it / use with caution
- People who have had a serious allergic reaction to lumasiran should not use it.
- It is used with care, and under specialist guidance, in pregnancy.
- It should only be used under a specialist service experienced in primary hyperoxaluria.
Monitoring
- Checking oxalate levels to see how well the medicine is working.
- Reviewing kidney function over time.
- Watching for reactions where the injection is given.
Side effects
- Redness, pain or swelling where the injection is given, usually settling on its own.
- Stomach upset or headache in some people.
- Rarely, allergic-type reactions, which should be reported to the specialist team.
Key interactions
- There are few well-established routine medicine interactions, but tell your team about all your medicines.
- It is used alongside other kidney-protecting measures rather than instead of them.
- Always tell your team about supplements and over-the-counter products you take.
Available as: A solution for injection under the skin, given by a healthcare professional.
Answers
Lumasiran: frequently asked questions
What is lumasiran used for?
It is used to treat primary hyperoxaluria type 1 by lowering how much oxalate the liver makes, which helps protect the kidneys from damage.
How does it work?
It is an RNA interference (siRNA) therapy that quietens an instruction in liver cells, so the liver produces less of the enzyme that drives oxalate production.
How is it given?
It is given as an injection under the skin on a regular, spaced-out schedule arranged by your specialist team.
What is the most common side effect?
Reactions where the injection is given, such as redness, pain or swelling, are the most common and usually settle on their own.
Does it cure the condition?
No. It treats the condition by reducing oxalate production but does not cure it, so it is a long-term treatment.
Authoritative sources
- BNF
- NICE CKS
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