According to a company spokesperson, the reformulation was necessary due to changes in the manufacturing operation, moving the production of the Eltroxin from Canada to Germany. While GlaxoSmithKline is saying that levothyroxine in Eltroxin is the same, there are new filler and binders in the reformulated product.
The Southland Times has more information.
Are you in New Zealand and taking the new Eltroxin? Share your stories here in the comments section.
UPDATE: June 11 -- The Southland Times has more on the Eltroxin story, reporting that after the initial reports of problems have hit the media, now the woman "who sounded alarm bells over changes to the Government-funded thyroid drug Eltroxin, has been overwhelmed by calls from people throughout the country who have also suffered side-effects."
UPDATE: August 30 -- Alternative to Thyroid Drug Eltroxin Is Sold Out in New Zealand