Interesting that the I-131 has that effect - from one extreme to the other. Grayson's was kind of the same, only his was caused by SRT - stereo tactic radiation therapy - that he had to treat his Acromegaly. The folks at CSU said this may be a side effect, but I only know of one other Acro that became hypo-t. G was on Thyrosin, but from checking on Google, they are all the same, just different names.