Is this common?

[Mags_23]

My Mum increased her Thyroxine almost 3 weeks ago week 2 she started to feel a little better & less tired, I saw a difference in her, but these past 2 days I've seen her take a dip. I know it can take upto 6 weeks for the Thyroxine to be in your system, but is this a common thing to take a decline?

[greygoose]

Yes, perfectly normal. Just means she's going to need another increase after the next blood test.