Phenylketonuria: Treatment and Support

Debate between Liz Twist and Tim Farron

Tuesday 26th June 2018 Westminster Hall

[Liz Twist]

I most certainly agree that it places an incredible strain on parents, who must live with that all the time. I recommend the “Patient Voices” booklet and video to anyone who has not already seen them.

In this debate, I will highlight very specific concerns about treatment and support for PKU. The first is the issue of access to a drug treatment, sapropterin, which is thankfully more commonly known as Kuvan. Although it is available in 25 countries across Europe, and was licensed for marketing over 10 years ago in the European Union, Kuvan is not available to people with PKU in the UK.

[Tim Farron (Westmorland and Lonsdale) (LD)]

I congratulate the hon. Lady on this important debate. She makes a hugely important point about the licensing of Kuvan. The European Medicines Agency licensed the drug in 2008, and 10 years on we have buck-passing between the National Institute for Health and Care Excellence, the Department of Health and Social Care and NHS England. It is deeply concerning. I am representing two children with PKU—I am sure there are many more—in my constituency. I got a letter back from NICE just a few weeks ago that said that the condition and the treatments for PKU are

“the subject of a NHS England commissioning policy…not covered by any existing NICE guidance.”

It went on to pass the buck back to NHS England. Does the hon. Lady agree that it is time for the buck-passing to stop, and for the treatment to be licensed?

[Liz Twist]

I absolutely agree. I hope that one of the good things that will come out of this debate is that the buck stops being passed, and the assessment gets done as quickly as possible. It is so important for people to have access to this drug; we need that to be sorted.

There is evidence that for a significant proportion of people with PKU—about 25% —this drug can significantly improve their condition. It does not cure it, but it does make it much easier to deal with the dietary issues, which have such an impact on the way people live their lives. Despite the drug having been around for so long, NHS England has only recently considered it for the management of PKU. The drug has now been referred to NICE for assessment and technology appraisal. The APPG on PKU recently heard from NICE about the process, but there is concern about the timescales and how the benefits of the treatment will be assessed. Understandably, there is huge frustration on the part of the PKU community that there are children and adults who could be benefiting from Kuvan now, and there is substantial evidence to support its benefits.

There is a particular issue about prescribing Kuvan for pregnant women with PKU, who can understandably find it hugely difficult to control their diet, and who fear the effect of any problems on their unborn child. While there is a 2013 commissioning policy in place that allows Kuvan to be prescribed to some pregnant women, it can be difficult for women to be prescribed it in a timely way.

Some people, some of whom are in this room, have had access to Kuvan through individual funding requests, or on a trial basis. Those people have found real benefits from the drug. My constituent Archie, who is here, started on the treatment earlier this year. Archie tells me he has benefited from having Kuvan, not just because his diet is now much less restricted and he is able to do what many of his school mates do, but because it has improved his energy and his life. As his mum Barbara said to me, “If we had been coming here before the treatment, we would have been bringing our own special breakfast for Archie to eat in the hotel, and would have had to watch everything he ate very carefully. It has made a real difference.” I hope that the Minister will be able to assure us that the assessment of Kuvan will be done very quickly, and that it will be available to the people it can help.