Use by date of Levothyroxine : Hello Lovely... - Thyroid UK

Thyroid UK

141,244 members166,489 posts

Use by date of Levothyroxine

PixieElv profile image
6 Replies

Hello Lovely Christmas People

I’ve just discovered that since of my Levo will expire at the end this year. Is it save/effective to use beyond the date in January?

thank you

Written by
PixieElv profile image
PixieElv
To view profiles and participate in discussions please or .
Read more about...
6 Replies
RedApple profile image
RedAppleAdministrator

It will be fine PixieElv. Eventually, it might lose a little potency, but that won't happen for months, maybe even years :)

SeasideSusie profile image
SeasideSusieRemembering

As RedApple says. Just to illustrate the point, I'm currently using some T3 with an expiry date of January 2020, so 23 months past it's expiry date and it hasn't lost it's potency.

helvella profile image
helvellaAdministrator

The answers emphasise why it is a good idea to be careful with storage of tablets such as levothyroxine.

The expiry date means that, so long as they have been stored adequately, they will remain potent at least to the expiry date. (In the UK, for levothyroxine, that is 90 to 105% of what the label says.) If you can be a bit more careful than that, they will maintain potency even longer.

Cool (not refrigerated). Dry. Dark. And, if in bottles or pots, sealed.

Wired123 profile image
Wired123

I agree with what others say but I had issues with a batch of T3 which was brand new. For some reason potency wasn’t quite right and I felt really tired and sluggish, blood tests confirmed something was wrong. Next batch put me right and bloods also recovered.

If you find yourself going backwards then the tablets are potentially an issue so be mindful.

janeroar profile image
janeroar in reply toWired123

I agree with this. I had a batch of T3 that was only a month or two out of date and i felt under medicated. Switched to a fresh batch and I was fine. So if you feel ok, continue but be mindful it might lose potency

Wired123 profile image
Wired123 in reply tojaneroar

Mine was a new batch, sealed bottle of 90 tablets which I go through in 45 days. Something must have happened that damaged the tablets and they lost potency.

Not what you're looking for?

You may also like...

Use by date on Liothyronine

Is liothyronine still effective after its use by date? How quickly would it lose its...
Harebell profile image

Levothyroxine use

Hi, I live in San Diego CA, USA and belong to Kaiser Permanente (an HMO). I'm 72 and have been...
SanDiegoCa profile image

Should I use Nature Throid past use by date etc?

I have some Nature Throid dated exp 3/21 does anyone know if it’s okay to use it, I know with a lot...
ainslie profile image

Guides lines on Levothyroxine out of date

I came across this yesterday, in a magazine from my local health food shop....
debsdoyle71 profile image

Comparative Effectiveness of Persistent Use of a Name-Brand Levothyroxine (Synthroid®) vs. Persistent Use of Generic Levothyroxine on TSH

We often see claims from the USA that Synthroid, "the brand name", is substantially better at...
helvella profile image
Administrator

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.