I'm hypo and have just finished a weeks course of anti biotics ,,, doxycycline ,, I since feel that my thyroid has dropped bit , was swollen yesterday . I'm on 75s so I've taken a sneaky extra 25 today. they have upset my stomach bit and its been suggested,, which i thought was good point,, that I'm possibly not absorbing my Levo as well as usual. In general, are they really bad for the thyroid and should i avoid in future ? Thanks !