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Looking for data/papers about high blood pressure and hypothyroidism (prev title:Anxious about seeing the gp this morning)

KatyMac68 profile image
15 Replies

& it's not even about my thyroid!

I had an episode of very high blood pressure on Monday 210/129 & the gp sent me to a&e - who took my bp said it was fine and sent me home with no meds and a warning not to start meds as it was probably a one off

I wonder if messing about with my levothyroxine is causing it

My results were very low in September & the gp wanted me to drop fron 50 to 25 and I said I'd rather wait 12 weeks and retest....she grudging agreed - I was feeling pretty good/well and had lots of energy

3/4 weeks later I started getting a few odd symptoms of hyperthyroidism so I dropped to 25 within 2 weeks I was tired again and my pain increased then I had this episode of high blood pressure!

My bp isn't stable currently it can range from 119/57 to 169/97 in less than 10 mins but has only been that high twice (on Monday)

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KatyMac68
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15 Replies
greygoose profile image
greygoose

High blood pressure can be a hypo symptom, in which case what is needed is an increase in dose, not BP medication. Sounds like your GP doesn't have a clue what she's doing! 25 mcg is only half a starter dose, nobody can live on that. And she is dosing by the TSH, which is 100% wrong. The TSH is unreliable and a very bad indicator of thyroid status. You were right to refuse to reduce to 25 mcg, and you should continue to refuse. And she should know that it's her that is causing your high blood pressure. Is there another doctor you can see that might actually know something about thyroid? Because this one will never make you well, I'm afraid, only worse.

KatyMac68 profile image
KatyMac68 in reply togreygoose

I did wonder, I'm looking for something peer reviewed to take with me

Mind you she hates that

greygoose profile image
greygoose in reply toKatyMac68

Most of them do. They think they know it all and don't need our opinions.

You could change the title of this post to say you're looking for papers on this subject. Then anyone that has any can link you to them. :)

KatyMac68 profile image
KatyMac68 in reply togreygoose

Did my best

greygoose profile image
greygoose in reply toKatyMac68

Oh! Was that your original title? Sorry, I didn't look. :)

KatyMac68 profile image
KatyMac68 in reply togreygoose

No I meant I've done my best to change it 😆 if I hadn't left the first bit in it would have confused me if I was reading it!! So I just added a bit but it looks clunky (which stresses me a bit but whatever!!)

greygoose profile image
greygoose in reply toKatyMac68

Clunky is fine! No-one on here is going too win the Noble Prize for literature! 🤣🤣🤣

tattybogle profile image
tattybogle in reply togreygoose

Hi KatyMac There are some heart related papers in this post, and some listed in a reply at the end , so hopefully you might find something of use in here :

healthunlocked.com/thyroidu... thyroid-disease-effects-on-heart-and-cardiovascular-system.-gps-told-keep-tsh-0.5-2-hypothyroidism-causes-raised-cholesterol

KatyMac68 profile image
KatyMac68 in reply totattybogle

Thanks, Reading now

KatyMac68 profile image
KatyMac68

So I saw the gp, she was only discussing the high BP

She checked my eyes and ears and throat and I have a symptomless ear infection so got drops

She refused to comment on my lumps (under my chin and below the ear (the side without an infection) just saying it would be good to get a scan and they weren't necessarily connected to the cough/hoarse voice I've had for 2 yrs+

& I'm getting a 24 hrs bp monitor and an ecg (again)

Tina_Maria profile image
Tina_Maria

I found this paper on thyroid disorders and blood pressure.

pmc.ncbi.nlm.nih.gov/articl...

Overt and subclinical hyper- and hypothyroidism can both lead to (mostly mild) hypertension; however, the underlying mechanisms are only partially understood.

Atherosclerotic changes resulting from lipid abnormalities due to thyroid dysfunction also affect the vasculature and can cause elevated blood pressure.

Elevated diastolic blood pressure is present in ~30% of patients with overt hypothyroidism. Cardiac contractility and output decreases leading to a narrowed pulse pressure. In hypothyroidism renin release is decreased with an increased salt sensitivity. The consequent renal sodium reabsorption leads to an expansion of blood volume by 5.5%

Although they talk about overt hypothyroidism, I would say this would still apply to patients that receive too little thyroid hormones, although their results say 'normal'.

Hope this will help.

Tina_Maria profile image
Tina_Maria

If you are on only 50mcg levothyroxine, your will be symptomatic as a result of your low thyroxine hormones to go with it.

The normal replacement level for adults is 1.6 mcg per kg of body weight, which means a person weighing 63 kg should receive around 100 mcg levothyroxine. Unless you are very petite, you will defo need an increase.

Here is a link to the NICE guidelines you could cite to her, even she cannot ignore prescribing guidelines:

cks.nice.org.uk/topics/hypo...

SlowDragon profile image
SlowDragonAdministrator

your post 5 months ago

Results

GP says my dose of levothyroxine is good (50)

Serum TSH level 2.23 mIU/L [0.27 - 4.2]

Serum free T4 level 17.1 pmol/L [12.0 - 22.0]

Free T4 (fT4) 17.1 pmol/L (12 - 22) 

Ft4 was only 51.0% through range

Clearly ready for next increase to 75mcg

Likely low vitamin levels having been left on inadequate dose levothyroxine

approx how much do you weigh in kilo

Even if we frequently start on only 50mcg, most people need to increase levothyroxine dose slowly upwards in 25mcg steps (retesting 6-8 weeks after each increase) until eventually on, or somewhere near full replacement dose (typically 1.6mcg levothyroxine per kilo of your weight per day)

cks.nice.org.uk/topics/hypo...

bnf.nice.org.uk/drugs/levot...

nhs.uk/medicines/levothyrox...

Adults usually start with a dose between 50 micrograms and 100 micrograms taken once a day. This may be increased gradually over a few weeks to between 100 micrograms and 200 micrograms taken once a day.

Some people need a bit less than guidelines, some a bit more

TSH should be under 2 as an absolute maximum when on levothyroxine

gponline.com/endocrinology-...

Graph showing median TSH in healthy population is 1-1.5

web.archive.org/web/2004060...

Comprehensive list of references for needing LOW TSH on levothyroxine

healthunlocked.com/thyroidu....

onlinelibrary.wiley.com/doi...

If symptoms of hypothyroidism persist despite normalisation of TSH, the dose of levothyroxine can be titrated further to place the TSH in the lower part of the reference range or even slightly below (i.e., TSH: 0.1–2.0 mU/L), but avoiding TSH < 0.1 mU/L. Use of alternate day dosing of different levothyroxine strengths may be needed to achieve this (e.g., 100 mcg for 4 days; 125 mcg for 3 days weekly).

sciencedirect.com/science/a...

The optimal daily dose in overt hypothyroidism is 1·5–1·8 μg per kg of bodyweight, rounded to the nearest 25 μg.

tattybogle profile image
tattybogle in reply toSlowDragon

SD . since then TSH fell to 0.22 on 50mcg . healthunlocked.com/thyroidu...

SlowDragon profile image
SlowDragonAdministrator in reply totattybogle

Well it would be good to retest

She’s now reduced dose to 25mcg

Presumably Hashimoto’s, despite negative TPO antibodies and levels fluctuating and/or low vitamin levels

Not sure if TG antibodies ever been tested

healthunlocked.com/thyroidu...

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