In the UK there are ONLY THREE available formulations of Levothyroxine tablet which have marketing authorisation (product licence).
In 100 micrograms they are made for Mercury Pharma and Actavis.
In 50 micrograms they are made for Mercury Pharma and Actavis.
In 25 micrograms they are made for Mercury Pharma and Wockhardt.
At each dosage there are ONLY TWO formulations.
In some cases the packaging may differ. For example, Mercury Pharma products are packaged as Mercury Pharma Eltroxin, Mercury Pharma Levothyroxine and Forley Generic Levothyroxine. However, the contents of these three are all absolutely identical to each other.
Some products are packaged, in much the same way as supermarket own-label products, as Almus (owned by the Boots people) and Lloyds pharmacy. However, these will still be one of the above.
Always check the Patient Information Leaflet to be sure what you have received.
(I have written “made for” because the actual manufacture of many medicines is done by subsidiaries or contracted out. We do not know enough of the details to make useful statements about that aspect.)
In the past there have been other formulations and marketing authorisations – for example, until last year, we had Teva products in 100 and 50 microgram tablets.
The main Thyroid UK site has had this statement for a long time:
It has been confirmed by Mercury Pharma (formerly Goldshield), that all tablets in boxes marked either Eltroxin, Goldshield or Forley are in fact exactly the same product.
… plus much more detailed information. It is a page that is well worth visiting.
This information is likely to change over time so, if you are looking back at this page, please visit the link above.