levothyroxine 100mcg: hello everyone I’ve... - Thyroid UK

Thyroid UK

141,244 members166,489 posts

levothyroxine 100mcg

CarolMSM profile image
12 Replies

hello everyone

I’ve recently had my meds upped to 100 from 75 mcg Teva but the 100 mcg are smaller in size than the 75 mcg..just wondering if they just look different but are stronger …I’m not sure how I feel as only had them four days now…has anyone else noticed this..I will ring the pharmacist tomorrow ..thanks Carol.

Written by
CarolMSM profile image
CarolMSM
To view profiles and participate in discussions please or .
Read more about...
12 Replies
helvella profile image
helvellaAdministrator

It is not unusual for the size of tablets to change in unpredictable ways.

It might help to remember that only around one thousandth of your tablet is actually levothyroxine! A tablet might weigh 100 milligrams. Which is 100,000 micrograms. But your dose is only 100 micrograms.

In the USA, where they usually have a large range of dosages, it is common for every tablet to be exactly the same size, regardless the dosage.

One UK make, the 25 was the physically largest tablet.

Does the tablet have 100 on one side and a score on the other? I have tried to include physical details (where known) in my UK medicine document. But I do not know the diameter of Teva tablets.

helvella's medicines documents (UK and Rest of the World) can be found here:

helvella - Thyroid Hormone Medicines

helvella has created, and tries to maintain, documents containing details of all thyroid hormone medicines in the UK and, in less detail, many others around the world. There is now a specific world desiccated thyroid document.

I highly recommend viewing on a computer screen, or a decent sized tablet, rather than a phone. Even I find it less than satisfactory trying to view them on my phone.

helvella - Thyroid Hormone Medicines - UK

The UK document contains up-to-date versions of the Summary Matrixes for levothyroxine tablets, oral solutions and also liothyronine available in the UK. Includes injectables and descriptions of tablet markings which allow identification. Latest updates include all declared ingredients for all UK products and links to Patient Information Leaflets, etc. PLUS how to write prescriptions in Appendix F.

dropbox.com/s/bo2jzxucgp9hl...

helvella - World Desiccated Thyroid

Contains details of all known desiccated thyroid products including information about several products not considered to be Natural Desiccated Thyroid (NDT/Desiccated Thyroid Extract/DTE).

dropbox.com/scl/fi/gx6dmz5i...

helvella - Thyroid Hormone Medicines - RotW

Contains details of all levothyroxine, liothyronine and combination products - excluding desiccated thyroid products. Details available vary by country and manufacturer.

dropbox.com/s/dliou4fszbegw...

The link below takes you to a blog page which has direct links to the documents from Dropbox and QR codes to make it easy to access from phones. You will have to scroll down or up to find the link to the document you want.

helvella.blogspot.com/p/hel...

CarolMSM profile image
CarolMSM in reply tohelvella

oh thanks for answering so quickly..I did another post as I realised both tablets were from different manufacturers. The 100 mcg tabs have a C on one side and TC on the other , thanks Carol

helvella profile image
helvellaAdministrator in reply toCarolMSM

C and TC means they are Accord product.

And they are about 6.1 mm diameter. (I measured my own tablets.)

CarolMSM profile image
CarolMSM in reply tohelvella

ok Thankyou

Obsdian profile image
Obsdian

I recently switched to Teva and was thinking their tablets were massive compared to almus. Lol

CarolMSM profile image
CarolMSM in reply toObsdian

Oh ok..it’s good to know then..thanks

SlowDragon profile image
SlowDragonAdministrator

Be aware …….Many people find Levothyroxine brands are not interchangeable.

Most easily available (and often most easily tolerated) are Mercury Pharma or Accord

Mercury Pharma make 25mcg, 50mcg and 100mcg tablets 

Mercury Pharma also boxed as Eltroxin. Both often listed by company name on pharmacy database - Advanz

Accord only make 50mcg and 100mcg tablets. Accord is also boxed as Almus via Boots, 

Wockhardt is very well tolerated, but only available in 25mcg tablets. Some people remain on Wockhardt, taking their daily dose as a number of tablets 

July 2024

Crescent levothyroxine. Dosages: 12.5, 25, 50, 75, 100

(Not yet known if all approved dosages are or will be available).

Excipients: lactose monohydrate, maize starch, croscarmellose sodium, gelatin and magnesium stearate.

Lactose free brands - currently Teva or Vencamil only

Teva makes 25mcg, 50mcg, 75mcg and 100mcg

Many patients do NOT get on well with Teva brand of Levothyroxine.

Teva is lactose free.But Teva contains mannitol as a filler instead of lactose, which seems to be possible cause of problems. Mannitol seems to upset many people, it changes gut biome 

But for some people (usually if lactose intolerant, Teva is by far the best option)

Vencamil (currently 100mcg only) is lactose free and mannitol free. 25mcg and 50mcg tablets hopefully available from summer 2024

March 2023 - Aristo now called Vencamil

healthunlocked.com/thyroidu...

healthunlocked.com/thyroidu...

Helpful post about different brands

healthunlocked.com/thyroidu...

List of different brands available in U.K.

thyroiduk.org/if-you-are-hy...

Posts that mention Teva

healthunlocked.com/search/p...

Teva poll

healthunlocked.com/thyroidu...

Once you find a brand that suits you, best to make sure to only get that one at each prescription.

Watch out for brand change when dose is increased or at repeat prescription.

Government guidelines for GP in support of patients if you find it difficult/impossible to change brands

gov.uk/drug-safety-update/l...

If a patient reports persistent symptoms when switching between different levothyroxine tablet formulations, consider consistently prescribing a specific product known to be well tolerated by the patient.

academic.oup.com/jcem/artic...

Physicians should: 1) alert patients that preparations may be switched at the pharmacy; 2) encourage patients to ask to remain on the same preparation at every pharmacy refill; and 3) make sure patients understand the need to have their TSH retested and the potential for dosing readjusted every time their LT4 preparation is switched (18).

And here

pharmacymagazine.co.uk/clin...

Discussed here too

healthunlocked.com/thyroidu...

CarolMSM profile image
CarolMSM in reply toSlowDragon

Thanks for the info

annnsandell profile image
annnsandell

Yes I am on 75mg and 100mg alternative days and the 75mg is a larger tablet. Packing in the tablet presumably but a pharmacist should be able to explain.

CarolMSM profile image
CarolMSM in reply toannnsandell

Thankyou

CarolMSM profile image
CarolMSM in reply toannnsandell

what brand do you take please

annnsandell profile image
annnsandell

CarolMSM It varies, currently 75 Crescent Oharma Ltd, 100 Accord. 100 is usually one strip of 14 and 75 a cut strip (14 from 28).

Not what you're looking for?

You may also like...

levothyroxine

Hello. I’ve recently been told to reduce my meds from 100 mcg one night and 75 mcg the next down...
CarolMSM profile image

100mcg Levo resulting in higher temp

I recently increased my dosage of levo to 100mcg just over a week ago after being on 75 mcg with a...
whatevs profile image

Is Levothyroxine toxic?

I was diagnosed with Hypothyroidism a year ago and my GP started me on 100 mcg Levothyroxine. My...
LizT10 profile image

Very confused - should I change treatment or continue trying different Levothyroxine doses

Hi – I am new to the forum (in fact not used a forum before!), am very confused and really need...
Goldfinch7 profile image

Teva levothyroxine

I’m currently on a dose of 75/100 mcg (50 mcg Actavis and 25mcg Wockhardt levothyroxin). The last...
Bagster2 profile image

Moderation team

See all
Jaydee1507 profile image
Jaydee1507Administrator
PurpleNails profile image
PurpleNailsAdministrator
SlowDragon profile image
SlowDragonAdministrator

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.