Could there be thyroid level changes after the ... - Thyroid UK

Thyroid UK

141,245 members166,495 posts

Could there be thyroid level changes after the Pfizer booster?

TaraJR profile image
37 Replies

I had the Pfizer booster 10 days ago. I had 2 doses of AZ before. I've been very very tired the past week, more trips to the loo, and my heart rate is higher - average 85, though it's usually about 72. It's reminiscent of being hyperactive decades ago.

Could the booster have affected my thyroid levels? Thinking I could reduce my T3 to see if that helps. I've been stable on T4 and T3 for 5 years up to now, usually 100T4 and 25/30 T3.

Written by
TaraJR profile image
TaraJR
To view profiles and participate in discussions please or .
Read more about...
37 Replies
tattybogle profile image
tattybogle

I reckon i 'd wait a bit longer see if it settles down on its own ?Could well have ben coincidence , but 10 days after i had pfizer (sept) i got pretty spectacular spontanious bleeding into my thumb .. and a very odd feeling in arm/ hand/ fingers... bit alarming at the time , but no repeat problems since then .

TaraJR profile image
TaraJR in reply totattybogle

Mmm.. The tiredness could be the booster, though it's got worse after the first week. Almost too much of a coincidence.

I'm dropping 5mcg T3 from today for a few days and see what happen.

JGBH profile image
JGBH in reply toTaraJR

I had the booster or 3rd jab as they also call it… confusing, last Friday and I have been feeling exhausted and sleep throughout the day. I felt lightheaded also yesterday top of my arm where I had the jab was itchy so scratched it , naturally became red and did swell up. Better today from the swelling point of view but the tiredness.

RedApple profile image
RedAppleAdministrator in reply toJGBH

JGBH, 'the booster or 3rd jab as they also call it… confusing,'

No, the third jab and the booster are not the same thing.

This third dose should be offered to people over 12 who were severely immunosuppressed at the time of their first or second dose, including those with leukaemia, advanced HIV and recent organ transplants. These people may not mount a full response to vaccination and therefore may be less protected than the wider population.

This offer is separate to any potential booster programme.

gov.uk/government/news/jcvi...

The rest of us just get a booster.

JGBH profile image
JGBH in reply toRedApple

When I asked the difference from the nurse who did it (and there was also a pharmacist present because it was done at my local pharmacy last Friday) they both said it was The Same….. So who to believe? I had the jab because I was sent a txt message because I have autoimmune diseases so immunosuppressed AND having immunosuppressant biologic injections on a weekly basis plus taking steroids. I was told that the NHS would get in touch with me later for a booster!! So hence the confusion. Does this make any sense to you?

RedApple profile image
RedAppleAdministrator in reply toJGBH

Yes, if you are immunosuppressed, you will have three jabs and a booster. The rest of us just get two jabs and a booster. :)

JGBH profile image
JGBH in reply toJGBH

Thanks, I get your point but both the nurse and pharmacist didn’t really seem to know…. They were hesitant in their replies…

RedApple profile image
RedAppleAdministrator in reply toJGBH

They need to read the government press release that I quoted from above! :) gov.uk/government/news/jcvi...

However, if they don't know your personal medical situation, I suppose they wouldn't necessarily know if they were giving you a third jab or a booster.

JGBH profile image
JGBH in reply toRedApple

Well, it was at my local pharmacy next to the surgery and they always work together so that’s interesting… chaotic somehow! I had to tell them my health issues and treatment, so they didn’t seem to know. Not great. Furthermore, friends of mine who are in my age group (living in a different area from me) but are not immunosuppressed were given a booster! That’s exactly what they were told at the time, very odd. So anyone can see this isn’t really organised otherwise this sort of thing wouldn’t happen. However…

SeasideSusie profile image
SeasideSusieRemembering in reply toJGBH

JGBH

I had the booster or 3rd jab as they also call it… confusing,

They are two different things.

There is a third vaccine for immunosuppressed people, they have 3 vaccines followed by a booster.

Everyone else has two vaccines followed by a booster.

Have you completed the poll and commented?

healthunlocked.com/thyroidu...

JGBH profile image
JGBH in reply toSeasideSusie

Thanks. Yes have completed the poll adding comments.

Annib1 profile image
Annib1 in reply toSeasideSusie

Hi there. This has also been confusing me. When the pandemic started I received a letter saying people like me on immunosuppressant drugs Were immunocompromised and I should keep a hospital bag packed and take care shielding. They then listed the drugs they were worried about but mine (sulfasalazine) was not listed so I did not pack a bag! Then just before I had my booster I got a letter saying I needed to book a third jab as I was on immunosuppressant drugs, but again mine was not listed. So, at the surgery for my booster I showed the doctor the letter and he said this booster was the same thing as a third jab and as I was on sulfasalazine I need not have been sent the letter. Most odd.

JGBH profile image
JGBH in reply toAnnib1

It looks like those who give the vaccines have no idea either… So, yes, they send the wrong message out. It is a chaotic situation. Clearly there’s a lack of coordination and communication between them.

SeasideSusie profile image
SeasideSusieRemembering

I suppose it's possible, and it could be that it affects some people not others. I imagine it would be a temporary thing but I don't really know. I've having my booster in a couple of hours time. I had AZ for the first two jabs and having Pfizer for the booster. It will be interesting to see if I react to this one, I had no reaction at all to the others.

TaraJR profile image
TaraJR in reply toSeasideSusie

Hope all goes well!

in reply toSeasideSusie

I had no reaction to the AZ. Had Pfizer on Wednesday and joint pain for 24 hours afterwards

SeasideSusie profile image
SeasideSusieRemembering in reply to

Have you completed the poll and commented?

healthunlocked.com/thyroidu...

in reply toSeasideSusie

Will do. Wanted to wait to see how long it lasted

TaraJR profile image
TaraJR in reply to

I had tiredness and a sore arm the first day after the AZ and the booster. But this tiredness and higher heartrate is a week after the booster. Odd

RedApple profile image
RedAppleAdministrator

TaraJR,

Observations and experiences like yours will be really helpful and visible to others if posted on our dedicated Booster poll thread here, please :) healthunlocked.com/thyroidu...

TaraJR profile image
TaraJR in reply toRedApple

Yes I will do. I'll just wait a bit longer to see how things pan out.

userotc profile image
userotc

Suggest you consider reporting to doc and, arguably more importantly, complete an MHRA yellow card as that's what its for. Cade83 also reported increased heart rate after vaccine yesterday.

27ah profile image
27ah

I've had a similar reaction. Feeling hyper. I reduced t3 a little and it has helped. But then tried to increase back to where I was and felt hyper again. Its been 8 days since I had the booster. I'm not sure how I'm going to feel in a few days on a lower dose. Having to play it by ear

Muffy profile image
Muffy

I had the two AZ jabs and then Pfizer booster. After four days of a fast pulse, I saw the gp. My bp was high as well. Ended up on meds to lower bp and slow heart rate. I had one ecg that was ok and will be having a 24hr ecg in the next week or two. I looked online and it recommended that if you had an increased pulse that starts four days after the Pfizer jab, seek medical attention .

Starmen profile image
Starmen

This is interesting as I had my first Pfizer vaccine in January and have had ongoing problems since I also had my second in April. I have had palpatations sweating rash nausea fatigue ect. My medication had been decreased and increased since this time. I have wondered if it could be related to Pfizer but it is early days with regard to patient feedback.I have had numerous GP phone consultations and referred to gasto and ent as I developed Tiñnitus in left ear nothing sinister showed up.

I have not had my 3 vaccine yet but I will be getting it soon.

I have had no explanation of why I had all these symptoms start at the same time I have thought it could be related to Pfizer vaccine setting off over active response.

I also have rheumatoid arthritis I take biological drugs for that and metherexate

It is quite a combination and who knows if in some people the vaccine could cause these symptoms. I just hope mine settle down and yours too

SeasideSusie profile image
SeasideSusieRemembering in reply toStarmen

Starmen

I have not had my 3 vaccine yet but I will be getting it soon.

Are you immunocompromised? If so you will have a 3rd vaccine followed by a booster. If not you will be having a booster not a 3rd vaccine. They are two different things.

Starmen profile image
Starmen in reply toSeasideSusie

Yes I am immunocompromised . I have been invited for a 3rd vaccine and a follow up booster in 6 months

I have been on medication to suppress my immune system for 24 years for the treatment of Rheumatoid Arthritis.

penny profile image
penny in reply toStarmen

This is not a spoof question; if you had ongoing problems since your second jab, why are you getting a third one? I am interested to know. This would also apply to those who had bad reactions to their first and then continued with more.

Starmen profile image
Starmen in reply topenny

Because there is no definitive evidence that the vaccine caused the symptoms.I have a number of autoimmune conditions and the risk of catching covid and being very ill still outweighs the on going symptoms.

penny profile image
penny in reply toStarmen

Thank you for your reply and explanation.

Starmen profile image
Starmen in reply topenny

I think it is a difficult decision to make but until they have more information about the possible affects of the vaccine on certain groups of people I am airing on the side of caution and having the vaccine. In the past I have been very ill with pleurisy and I know how getting any illness or infection affects me.

I too had the two AZ jabs then had the Pfizer booster 11 days ago. Sore arm for first 4 days, then since then have had extreme exhaustion and intermittent joint pain. I have completed the survey as quoted above. My elderly mother, also hypothyroid, had the same reaction, with additional bright yellow diarrhoea.

Greeneyes14 profile image
Greeneyes14

Could it not just be your bodies immune response to the vaccine? Being given a jab puts the body under allot of strain, its likely nothing to do with your thyroid or t4 treatment. I think its sensible to ride this out, and leave your treatment alone. If it continues speak to your GP.

Duckydoodle profile image
Duckydoodle

This is interesting. I had 2 doses of Pfizer, last in April so considering booster next month. I do recall feeling very “off” for a few weeks, like I was hyper - anxious, faster heart rate, higher BP, etc. It was concerning enough that I remember thinking I would probably pass on any boosters that came along in the future. Your post has reminded me of all this. Decisions decisions….ugh. Hope you feel better soon.

Thyroid17 profile image
Thyroid17

I wondered this. First Pfizer, no significant change. Second Pfizer, extreme fatigue followed by hyper stage for few weeks before return to hypo. Third Pfizer (asked vaccinator what dose booster was and was told identical to first two), fatigue for almost two weeks now currently feels like I'm in an extended hyper phase (from quite hypo). Have had to temporarily reduce my meds as totally wired and not sleeping. Assume I'll revert to hypo soon so carefully monitoring as best I can. Confusing.

Xheila profile image
Xheila in reply toThyroid17

Thyroid17, my first two doses were both Pfizer and you described me to a T after the 1st and 2nd. Unfortunately, I lowered my NDT dose for a few weeks after the 2nd because I felt so hyper, but since then I'm having a hard time getting back to wellness. I'm even on a higher dose NDT now. It is enough to make me wait much, much longer to get the booster.

Thyroid17 profile image
Thyroid17

I did have trouble deciding before my booster, it is such a personal decision. I finally although nervously decided to go for it as two of my colleagues had been ventilated with only one pulling through (early on in pandemic). I completely understand as I am still hesitant about any possible future ones, I suppose it depends on how this hyper stage pans out and what follows. I have temporarily halved my dose to rid myself of this wired feeling and hope for good sleep but am watchful for any warning of an impending dip.

Not what you're looking for?

You may also like...

Could it be the fillers?

Hi everyone, I've been doing well for a couple of months on 2 grains of Thyroid S (I was diagnosed...
Lozzie611 profile image

Could it be the thyroid after all? No diagnosis

Three years ago I got really unwell, and the doctors first suspension was that it could be my...
krillemy profile image

What Could Be The Problem

Hello Good People !!! It's been awhile since I've commented but I urgently need your advice. In the...
MightyMay profile image

Could This Be Thyroid?

I know what you're going to say... do these tests and just wait and see... I'm very anxious with...
Mrs_Walsh profile image

Could my thyroid really be the problem?

I think I posted this in the wrong section so posting again here! I wrote on here last week for...
katmell profile image

Moderation team

See all
RedApple profile image
RedAppleAdministrator
PurpleNails profile image
PurpleNailsAdministrator
helvella profile image
helvellaAdministrator

Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.

Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.