Diagnosed Hashimotos 30 years ago. On T4 only. What blood tests should should I try and get from my GP

Hi Firecrest and welcome to the forum.

I'm sorry to hear you had breast cancer and the drugs are causing you pain. I'll keep it simple with a brief reason why your GP should do the following tests:

TSH, FT4 and FT3 to check you are converting in view of your ongoing symptoms, recent surgery and possible conversion inhibition caused by Letrozole. Your GP should note on the blood requests that he needs FT3 status as labs often decline unless TSH is suppressed.

You can ask for thyroid peroxidase (TPOab) antibodies to be tested but as you already know you have Hashimoto's it seems a bit pointless unless you want to know your current antibody levels.

B12 and folate re your vegetarian diet and because nitrous oxide in general anaesthetic strips the body of B12.

VitaminD as low levels can cause pain, fatigue and inhibit conversion of T4 to T3.

Ferritin as iron may be low due to vegetarian diet and breast cancer.

Ask for a printout of your results with the lab ref ranges and post them for comment when you're ready. VitD can take a week to 10 days to come back but you can post your other results.

As for feeling you ought to be grateful because others are worse off, that's plain daft. You feel very unwell and are trying to heal yourself but if you need to let off steam and vent go for it. We all need to at times.

Welcome to our forum

I am sorry you have been unwell for many years, despite being on medication. Are you from the UK?

Have your blood test as early as possible and don't take your medication until afterwards. If you take your meds at night, miss this dose and take after blood test. Ask for a Vitamin B12, Vit D, iron, ferritin and folate.. Get a copy of your blood test results, with the ranges (labs differ throughout the UK and ranges are important as it makes it easier to comment)

Post your blood test results on a new question for comments.

Levothyroxine should be taken around 1 hour before breakfast with one glass of water and no supplements/other medications for around 4 hours.

Don't worry as all of your symptoms you detailed above seem to be clinical symptoms of hypothyroidism. You may well be undertreated.

Best wishes

Thank you both, very much. I meant 150 mcg and 100mcg respectively in my post, not 1mcg as stated!!!

Sorry, I am always doing that, ridiculous after thirty years of medication .

I could not get a Drs appointment ( after printing out your advice to take with me and feeling fully prepared for once). He did phone me later as promised and I grapped my print out but could not find my glasses (aagh). I tried to read the relevant tests and mentioned a couple of symptoms and he said 'So really you want a complete MOT of tests I think'.

Anyway, I am going to the nurse on Friday and will see which tests he has included. B12 was the one I stressed but wanted T3 as well. When I get my results I will post on here and ask for your advice again if that is OK.