Learn how treating my underactive thyroid with levothyroxine has improved my sleep, mood and chronic pain,
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Back in May, I had my thyroid tested on advice from my doctor at Breakspear Medical. Despite having had numerous thyroid tests previously, I decided it was worth retesting. I hadn’t tested in a couple of years but I was still expecting yet another ‘normal’ result. However, this time, my result showed an underactive thyroid. You can read more about the results of my thyroid test here.

Getting Treatment For My Underactive Thyroid Was Not Straightforward

I had tested my thyroid through Medichecks and decided to pursue treatment from the NHS rather than Breakspear. I figured that I would see my GP and either be handed a prescription or referred to an endocrinologist.

The latter happened but, unfortunately, my referral was refused. This was based on the fact that the NHS endocrinologist concluded that I did not need treatment. The reason for this; my TSH was normal. I had low TT4, low FT4 and low FT3 (all thyroid hormones). I was also positive for thyroglobulin antibodies. But, it was the TSH the decision was based on, nothing else seemed to matter.

Seeing A Private Endocrinologist For A Second Opinion

Not satisfied with this,  I sought a second opinion from a private endocrinologist. She agreed that– based on my symptoms– it was worth trying a small dose of Levothyroxine to see if it helped me. Although my TSH was technically normal, I was told that it was the higher end of normal. Bringing it down could help me to feel better and, of course, all the other hormones were too low as well.

I have now been taking Levothyroxine around two months. So, I thought I would write an update and let you know how I have been finding it.

Treating My Underactive Thyroid with Levothyroxine

Having an underactive thyroid (or hypothyroidism) essentially means that the thyroid gland is not producing enough hormones. The first port of call for treatment is a drug called Levothyroxine. Levothyroxine is a synthetic T4 hormone replacement (one of the thyroid hormones).

I was thankfully able to get this on prescription from the NHS based on the recommendations from the private endocrinologist. I was prescribed a small dose; only 25mcg. This was because there wasn’t a huge amount of leeway in my blood work.

How A Normal Thyroid Functions

Normally, the pituitary gland in the brain releases a hormone called ‘thyroid stimulating hormone’ (TSH). This hormone stimulates the thyroid to produce the hormone thyroxine (T4). Your body then converts T4 into T3, which is the form of hormone that your body actually uses.

There is a feedback loop, so when there are enough thyroid hormones the pituitary gland is ‘told’ to stop producing as much TSH. Conversely, if there aren’t enough thyroid hormones, the pituitary will be ‘told’ to release more TSH. Clever stuff, huh?

Why There Wasn’t A Lot Of Scope With My Results

I was put on a small dose of Levothyroxine as there was not a huge amount of scope within my blood work. The idea behind treating with Levothyroxine is that it could help to increase the levels of total T4 (TT4), free T4 (FT4) and, hopefully, free T3 (FT3). Plus, reduce the levels of TSH to the lower end of ‘normal’. However, it’s a delicate balance

If I was given too much Levothyroxine, my pituitary would be told to stop producing TSH. This would result in my body no longer producing thyroid hormones naturally. This is something we obviously didn’t want to happen.

My Blood Results Have Improved

Due to this delicate balancing act, my endocrinologist wanted to retest my thyroid every month. I have had two blood tests now, both of which I did through Medichecks. I’ve found Medichecks to be great. They are very reasonably priced and their tests can either be done at home or a clinic. They also always  put their thyroid tests on offer each Thursday.

Both of my recent test results are looking good. All my hormones are well within normal range now. My TSH is now at the lower end of ‘normal’ and my TT4, FT4 and FT3 have all increased to be well within normal range (they’ve all pretty much at least doubled!). I also no longer test positive for antibodies.

I am therefore okay to stay on the same dose of Levothyroxine (many start on a small dose and increase it if necessary).

I Feel Fortunate That Levothyroxine Has Helped Me

Before I go on to say how I’ve been feeling and chat about my symptoms, I just want to point something out. Levothyroxine does not help everyone. Thankfully, it has for me and the reason will be because my body has no trouble converting T4 to T3.

Remember how I said it is T3 that your body actively uses? Some people have problems with their thyroid because their body struggles to convert T4 into T3. In this case, treatment with both T3 and T4 is required. Many prefer desiccated thyroid treatments (which contain both hormones) for this reason.

How My Symptoms Have Changed Since Treating My Underactive Thyroid

When it comes to treatment, I believe how we feel counts more than what a blood test says. My blood tests may look good, but have I noticed any changes? Thankfully, I can say yes. I have definitely seen improvements since I started taking Levothyroxine.

The changes in my symptoms were initially subtle and slow. As the weeks have gone on, I’ve come to realise just how much I have benefitted. I’ve seen improvements in some symptoms that I felt were caused by my Fibromyalgia. But now, I’m wondering if my thyroid has been the main perpetrator!

Symptoms That Have Improved

1. Sleep

Levothyroxine has definitely helped to improve my sleep. I am falling asleep much easier and I sleep better through the night. Some nights my head hits the pillow and I don’t wake again until the next morning! Which, when you have Fibromyalgia and Lyme disease, is quite frankly amazing. I still have the occasional poor night’s sleep but I can’t complain.

2. Waking up is much easier

I am naturally waking up around 8 o’clock. Mornings, while still not my favourite, have been less challenging recently. Again, there are still the odd days where I struggle more than others. But, prior to taking Levothyroxine, waking up was very hard to do! My alarm would go off at 9 am and I’d literally want to fall straight back asleep. So this is definitely a welcome change.

3. I feel less anxious

I was feeling anxious a lot of the time before I started Levothyroxine. For no reason at all! It was horrible. Thankfully, I feel less anxious and more calm and relaxed since taking Levothyroxine.

4. My mood has improved

I was having some bad mood swings before I started treatment for my underactive thyroid. I would be overcome with rage over the silliest of things. Which, I have to say, is very unlike me! I also felt really down at times and generally not like myself. Thankfully, my mood has definitely improved and feels more stable.

5. My better days are even better

I would say that I have felt more well in myself and a little more energised on my better days. I swear that the Levothyroxine must be one of the reasons why I did so well when I was in London recently. Conversely, I don’t feel as ill or as fatigued during the bad days… which still happen. There’s no miracle here folks, I can still feel rather crap! Just less so than before, which I’ll happily take.

6. Pain

I have really struggled with pain at times this year… which you may have guessed by the number of pain-relieving gadgets and supplements I’ve been reviewing over the course of 2016! While pain can still be a problem for me (especially in my lower back), I’ve seen an improvement in the general all-over aching-type pain. It’s basically what I would have described as my fibromyalgia pain; the type that is constant and wears you down. It hasn’t disappeared but there’s been a definite improvement there. It’s definitely been taken down a notch or two.

How I Feel About Levothyroxine

I feel it’s positive that I have seen these improvements with Levothyroxine. It’s amazing to think how much a small dose has actually helped me. Previously, I would have blamed Fibromyalgia for many of the symptoms I listed above. Now, I question whether an underactive thyroid has played more of a role than I realised.

However, I feel it’s important to share that Levothyroxine hasn’t been some miracle cure. It has simply been a positive step towards lessening the severity of and improving some of my symptoms. I am still sick but, the way I see it, my body has one less ‘energy drain’ to deal with. Supporting my thyroid has definitely been a positive step in my healing.

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Learn how treating my underactive thyroid with levothyroxine has improved my fibromyalgia symptoms. I've seen improvements in my sleep, mood and chronic pain,



Hello, I'm Donna. I was diagnosed with Fibromyalgia in 2013 and started this blog shortly after. After my health declined significantly the following year, I decided to become my own advocate and searched for answers. It took two years but, in 2016, I finally discovered I had Lyme Disease. On February Stars, I share my personal journey back to better health; discussing what has helped me and the mistakes I've made along the way. I also cover topics on self-improvement, managing symptoms and living life to the fullest with chronic illness.


  1. I am glad that Levothyroxine has helped you.

    This makes me wonder, though if this means that Lyme Disease can cause the pituitary gland to send the wrong signals to the thyroid.

    I hope that you continue to get the benefits of this medicine!

    P.S. Have you had any side effects from the medicine? For me, I tend to get side effects from medicines, which can be a concern of mine.

    • Thank you, me too. Yes, I do believe that Lyme can play a role. I have read that many with Lyme can end up with Hashimotos because of molecular mimicry— the body gets confused between attacking the bacteria with the thyroid.

      I felt more tired and flu-like in the first 3 or so weeks, so I guess it took time for my body to adjust and get used to it. But now that I am I get none. Which is not like me. Normally I can’t tolerate Meds well!

  2. Kim Lennie Reply

    I am so glad the Levothyroxine is helping. It is always good to have the thyroid functioning on the right level for it does affect all aspects of the body. It does though take some time to feel the effects but well worth it in the end. I take Synthroid as the Levothyroxine played awful side effects on me and wasn’t helping at all. Synthroid is another med that also helps the thyroid and has worked wonders for me. I though started high at 125mg and was at that for some 20 years and now down to 75mg. I know though something is still not quite right cause I’m losing my hair at a very great rate and feeling tired all the time even more so than usual. So back to the doctor I will go. I really am glad all is going good for you it’s nice to know that with persistence you can get the help that you need.

  3. Sarah Tait Reply

    I had Graves disease and had my thyroid ablated so now am hypothyroid and on levothyroxin…
    glad to hear it is helping you but if you start feeling bad or have changes get your labs tested again and at regular intervals as I have had to adjust my dosage several times.

    • Sorry to hear you have had thyroid problems. Thank you for the advice, I completely agree 🙂

  4. Lovely reading all your very thorough researched results Donna. If I could keep you, with me I would. ???? Lovely to read everything and I’m at a stumbling block with my Thyroid. I stopped all my medication as they were given to me by my doctor in Spain. Scotland didn’t know what to give me. So as I was running out of my Spanish medication. I’ll hopefully have a recommendation soon. ????

    • Thank you, Alison. Hopefully, your stem cells will help to heal your thyroid and this won’t be a concern for you anymore 🙂

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