thyroxine -brand query

Been on 100 thyroxine several months, starting to feel more normal, noticed symptoms returning seems to co-incide with my latest prescription being a different brand than before.
Has anyone else had this?

[kipland]

I've read several articles that suggest that once you're on a brand and it's working, that you should stay on that brand.  I'm going through somewhat the same issue, due to my insurance not covering the brand that I've been on for 3 months.  I think I've decided to stay on my current brand (Levoxyl) and pay the extra.