Congrats! I was on Keytruda for a year as part of my treatment, as part of a clinical trial for Merrick to get approved for my stage of TNBC.

I developed immune-mediated thyroiditis. Basically, I didn't have any thyroid symptoms except we could see the levels change during blood work, and at the right moment we worked with an endocrinologist to get on thyroid meds.

It was a side effect I knew about but was definitely okay with given the limited arsenal we have for TN. I'm also on another medication that would slowly have burnt out my thyroid, so having it burn out fast with zero thyroiditis side effects was okay by me.