How long for Levo to take effect?: I’ve started... - Thyroid UK

Thyroid UK

137,631 members161,400 posts

How long for Levo to take effect?

Jamima profile image
13 Replies

I’ve started self medicating with Levo 50 dose. I’ve had almost 3 years of a partial life and NHS medics who keep telling me I’m healthy and I’m afraid I just can’t do it anymore. My question is, how long does it take for any effects to be seen. I’ve only been taking it for a week and feel a little lighter in mood and less fatigued. Is this possible so soon?

Written by
Jamima profile image
Jamima
To view profiles and participate in discussions please or .
Read more about...
13 Replies
helvella profile image
helvellaAdministratorThyroid UK

It is impossible to know. Some people notice a single dose - other take weeks to realize things are changing.

Entirely possible to feel a bit better after a week.

Make sure you get tested and dose adjusted about six weeks after you started.

Jamima profile image
Jamima in reply to helvella

Thank you, yes I will test regularly.

SlowDragon profile image
SlowDragonAdministrator

Unlikely to notice much improvement for 2 weeks

Might not see anything noticeable for 6 weeks

Bloods should be retested 6-8 weeks after each dose increase

Jamima profile image
Jamima in reply to SlowDragon

Thank you.

greygoose profile image
greygoose

Yes, it's possible. Doesn't work like that for everyone, but we're all different. However, it will take 6 to 8 weeks to feel the full effects. I'm glad for you that you're feeling better already. :)

However, don't panic if you suddenly start to feel worse again. That is a perfectly normal chain of events: start levo, feel better, feel worse again. It doesn't mean that they levo has 'stopped working', or that it's 'not right for you'. I just means that whilst your body is grateful for the sudden surge of extra thyroid hormone, it goes on to realise that it's not enough, and you are ready for an increase in dose.

That pattern can repeat with every increase until you get to your optimal dose, and the symptoms don't come back. That is what we call your 'sweet-spot'. :)

Jamima profile image
Jamima in reply to greygoose

Great, many thanks Greygoose. When testing, how long do I leave after last dose?

greygoose profile image
greygoose in reply to Jamima

24 hours. Make sure you get an early appointment for the blood draw - before 9 am, because that's when TSH is at its highest - and fast over-night. No food or coffee before the test because that can lower TSH. :)

Jamima profile image
Jamima in reply to greygoose

Many thanks.

greygoose profile image
greygoose in reply to Jamima

You're welcome. :)

Jamima profile image
Jamima in reply to greygoose

I wonder if you can help with this too - I have a phone consult with my nhs endo in 4 weeks, he’s been less than useless up until now, but I don’t know what to tell him, assuming I continue to get better, do I confess to the self medicating? Will he then discharge me?

greygoose profile image
greygoose in reply to Jamima

Oh, I really can't advise you on that. It depends so much on the man himself: his temperament, his character, his understanding of thyroid... I would suggest that you listen to anything he has to say before deciding. You could always write him a letter after your appointment, when you've had time to consider. I'm afraid it's a situation you have to play by ear.

Jamima profile image
Jamima in reply to greygoose

Many thanks.

greygoose profile image
greygoose in reply to Jamima

You're welcome. :)

You may also like...

How long before levo takes effect?

Hello - I have been taking levothyroxine 100mcg daily for two weeks now. I think there are small...

How long for increase to take effect.

0.01 (0.35 - 4.94). Told my new GP I'm taking 175mcg of levo, she's disgusted with me and told me...

How long for Teva Levo side effects to disappear?

been really well, taking 125 mcg Levo from my GP, plus 37.5 mcg Mercury Pharma T3 self sourced from...

On average, how long is it likely to take before I feel a decrease of 12.5mcg Levo?

only and I’m feeling a bit shaky and anxious – many of the symptoms of being under medicated before...

How long to feel effects of NDT?

150mg levo to 100mg levo + 30mg NDT (erfa) as he said that would effectively be the same dose....