Hypothyroidism

Jim Shannon Excerpts

Tuesday 17th December 2013 Westminster Hall

[Mrs Caroline Spelman (Meriden) (Con)]

I am very grateful to have the opportunity to raise this subject in Parliament. It was first brought to my attention by a constituent; I will obviously keep her name confidential, but she is content for me to discuss her experiences, which are not unusual. Hypothyroidism is not a small or niche illness; it is estimated that up to 3.5 million people in the UK may have a thyroid problem. It disproportionately affects women compared with men, by a power of 10, and the effects of the disease can be really debilitating, with the many symptoms including tiredness, aches, weight change, coldness, memory loss and depression. Even more seriously, the disease can impact on the functioning of the heart. The problem is that many of these symptoms are not unique indicators, and therefore they may be hard to pinpoint or describe.

When someone is suspected of having an underactive thyroid, or hypothyroidism as it is known, their GP will usually do a blood test to check the levels of the thyroid-stimulating hormone, or TSH. This test is called the TSH or FT4 test. In the UK, an abnormal test result will only come back for someone who is above the “over” levels of the TSH bell curve for the population. That means that some people may have sub-clinical levels of hypothyroidism but they are not flagged up for treatment. Once again, there is a disparity between the number of men and women with sub-clinical levels of hypothyroidism; three times as many women as men suffer from those sub-clinical levels. The opposite can also be true. Doctors have to consider how to treat patients with abnormal results who otherwise show no clinical signs of hypothyroidism. Therefore, it is accepted that GPs might face many different problems when trying to treat a patient with hypothyroidism.

However, my constituents know exactly how difficult and frustrating it can be to live without effective treatment of their condition. I expect that all of us know someone who has suffered from hypothyroidism, and I think that we are all aware of the impact it can have on someone’s quality of life.

[Jim Shannon (Strangford) (DUP)]

In her introduction, the right hon. Lady mentioned that about one in 50 women and about one in 1,000 men develop the disease in their lifetime. Does she agree that if someone has a family history of the disease, perhaps at a certain stage of life there should be a check carried out on them to see if they have it?

[Mrs Spelman]

I thank the hon. Gentleman for his intervention, because that is an excellent suggestion; it is what I would describe as a no-brainer. If someone has a family history of the disease, surely that should be a very strong indication for the GP to be proactive in monitoring the possibility of it appearing in subsequent generations within the family. The Under-Secretary of State for Health, my hon. Friend the Member for Battersea (Jane Ellison), is responding to the debate and perhaps she could respond to that point.

The constituent who first brought this issue to my attention a couple of years ago is, in fact, director of the charity Thyroid UK, which has been contacted by 19,000 thyroid sufferers. There was recently a petition with more than 5,000 signatures from sufferers who wish to see this matter debated and this disease being better dealt with. Therefore, I want to take this opportunity to raise awareness of this serious disease, the methods of diagnosing it and the ways of treating it. I also want to question the broad range of GP responses to diagnosis. More training is required to ensure that GPs respond consistently and are ready to test a patient fully for thyroid problems, so that a quick and full diagnosis can be made. That should include checking someone who has a family history of the disease, which was the excellent point made earlier.

If hypothyroidism is left undiagnosed, it can affect heart health, as I said before. It can also be a risk in pregnancy for a younger woman. If they are undiagnosed, sufferers have to live with unabated symptoms. Wrongly diagnosed patients spend time and money on visiting different specialists, as they try to find an answer to the symptoms they know they have. That is obviously a waste of both the patient’s time and the doctor’s time, as well as a waste of precious resources within the NHS. Effective and quick diagnosis is needed. There are many stories of misdiagnosis, for example where depression or fibromyalgia is diagnosed, and therefore the patient is given the wrong prescription, which can include anti-depressants and other hormone-altering drugs.

There is also an argument that in the long term correct diagnosis and treatment will cost the NHS less. In addition, a healthy, active working patient will cost the state less in benefits. My constituent had to give up work during a period of five years, and she very much regrets that her symptoms necessitated her having to do that. The disease obviously has a huge impact on someone’s life and on their overall earning capacity within their working lifetime.

It is imperative that all GPs are trained in identifying this condition, and that they are reminded to consider that certain symptoms might indicate hypothyroidism even if someone’s TSH test comes back as normal. For example, could it be that the patient is still affected by sub-clinical hypothyroidism? Should the range for those considered “normal” be reduced to bring in these borderline and sub-clinical patients? In the UK, the test considers anything above 10 ml of TSH in serum in the blood as abnormal. However, given that 10 ml is an average figure, there will be individuals who may be hypothyroid with TSH levels below the 10 ml figure. So there may be an argument for reviewing the 10 ml level. At the very least, there should be assurances that the tests are standardised, with reproducible performance in different laboratories. I have discovered that in Germany the threshold is, in fact, 3 ml, but I have to say that it is measured in a slightly different way from the way that we measure it here. However, one question that I put to the Minister is this: why does there seem to be a more sensitive threshold in another well-developed country such as Germany, which might allow a doctor to be alerted sooner than might be the case here?

When a normal result is shown but symptoms are present, why is it not regular practice to carry out a T3 test, in case the problem is caused by a malfunction of the pituitary gland rather than a malfunction of the thyroid gland, or a lack of conversion from T4 to T3? A consistent and sympathetic approach to hypothyroid diagnosis by GPs and specialists is necessary, putting the needs, experience and concerns of patients first.

There is also an inconsistency in the prescription medicines that are offered. Guidelines from the National Institute for Health and Care Excellence clearly state that levothyroxine should be prescribed in the case of overt hypothyroidism, and that might be why the 10 ml level is required by the test. NICE also states that T3 should not be used in conjunction with levothyroxine.

First, it should be made clear that the test to see if the disease is present should not be set at a level solely for identifying the level needed for prescription and a curative drug. The threshold perhaps needs to be different to ensure that there is early and correct diagnosis. People need to know with certainty what illness they might have, in order to give them at least the ease of mind that they have the answers to their health questions.

Recently, the Medicines and Healthcare products Regulatory Agency called into question levothyroxine tablets made by a company called Teva. The agency recognised that levothyroxine is now far more controlled in its production and sale here in the UK. Levothyroxine is licensed in the UK, and I am not suggesting that those problems have not been dealt with; they have been. However, in the minds of patients, doubts were of course raised at the time.

Levothyroxine is not a drug as such, but is a naturally occurring thyroid hormone made to replace the missing hormone in someone who suffers from hypothyroidism. NHS Choices is clear that the drug does not usually have any side effects, unless too much of it is taken. Levothyroxine sodium can also be used.

A naturally desiccated thyroid treatment, or NDT, is a medication made from dried porcine thyroid glands. Before artificial thyroxine existed, this product tended to be used. I do not know at what date it ceased to be licensed, but presumably it was licensed in the 1960s, when it was the only product available. It is not now licensed in the UK, as the hormone levels in the naturally desiccated thyroid treatment can be inconsistent and both T4 and T3 hormones are present. However, my constituent is anxious that sufferers such as herself, who do not respond well to the artificial thyroxine product, should be able to be prescribed NDT treatment as an alternative.

The Royal College of Physicians advises against the use of the hormones T3 and T4 together, as that is inconsistent with normal physiology and high risks of long-term harm may outweigh the considered short-term benefits to the patient. However, NDT is prescribable by GPs, on their own direct responsibility, in respect of their patient’s health. Therefore they are rightly under no obligation to prescribe it. The Minister might like to reflect on the fact that, within the NHS, such variation can be a cause of concern among patients, some of whom do not have access to a GP who will prescribe it for them.

This inconsistent approach by doctors has caused distress among patients, some of whom have received the drug from GPs although others have not. Patients do, of course, compare notes. This inconsistency needs to be addressed. Combination and NDT drugs probably do not yet meet the clinical requirements to be licensed in the UK. However, it is surely time that a T3 replacement medicine or a combination medicine that meets the requirements is researched and produced. There is official recognition of some patients’ preference for such medicines, although it was understood, when studying patients who were unaware that they were taking a combination drug, that there is no clinical benefit. There is guidance to GPs on explaining the possible benefits and dangers in full to their patients.

There may be sufficient justification for a reappraisal of the treatment of hypothyroidism in the UK by such bodies as NICE and the Society for Endocrinology. Such a professional reappraisal would also benefit from the involvement of patients. The results of any reappraisal should be communicated clearly to patients, health care professionals and prescribers, and we parliamentarians, who take up individual cases.

I pay tribute to the work of the charity, Thyroid UK, which provides important support to the large number of sufferers, and families, affected by this disease.