Gloria is spot on with her info. Prior to beginning treatments its important for every patient to have a full blood test including thyroid and testosterone levels (only men need). This has been discussed many times here. I do remember Charm posting about it several years ago. Charm was a dear friend who was one of the kindest and most knowledgeable people Ive ever met. Rads (with or without chemo) does a number on most OC patients with having a direct impact on both thyroid and testosterone in men. My thyroid took the hit and started getting messed up a couple years after finishing rads. Its a tiny little pill that I put thru my tube every morning so its not a big deal. My ENT orders blood work every 6 months to keep an eye on my thyroid levels and adjusts meds accordingly. Im at 75mcgs of levothyroxine, just changed from 88 in Feb. From the talks Ive had with my very experienced ENT, seems like almost every patient who has rads ends up on thyroid meds eventually.