Thyroid is very important. They basically fried mine, which was to be expected. I would have a TSH done quickly and see if he needs levethroid. I'm taking 88MG and it helps a lot. I took me over 18 months to not be tires at the end of the day. Tell him to hang in there and get some his vitals and blood work checked.

SCC, base of tongue, 2 lymph nodes, stage 3/4. 35 X's IMRT radiation, chemo: Cisplatin x 2, 5FU x2, & Taxol x2. Hooray, after 3 years I'm in still in remission.