Hi, only just seen your message so sorry for the late reply. I hope your meeting went ok.
I'm in the job as well and went through all of this so I can really sympathise. I was diagnosed with Graves disease after feeling ill for a couple of years before. I thought it was my body reacting to years of shift work to begin with.
I asked to be taken off front line work but my request was refused. Fortunately my Doctor was sympathetic and I was on restricted duties for about 8 months, non confrontational and the latest I worked was until 23.00hrs. I think I was off sick for about 9 weeks in total, two blocks of illness as the meds made me go from overactive to underactive before the thyroxine was introduced.
Unfortunately my Sgt and Insp were not so sympathetic. My Insp told me he had been speaking about my condition to his Doctor wife and was telling me how I should be feeling because of the medication I was on...and didn't like being contradicted!
My Sgt was pushing for me to become fully operational and was becoming frustrated that my meetings with Occy Health were confidential and that I continued to be on restricted duties. His opinion was much the same as your colleagues, that the medication should be an instant cure.
The Force Doctor did however point out to my Supervisors that I fell under the Disability Act because of needing medication to function on a daily basis.
My main symptom was excessive tiredness which caused brain fog; I couldn't concentrate and felt too weak to cope with the physical aspects of the job. The tiredness didn't really shift even though my blood test results eventually came back ok. I've realised now that when I'm stressed this is when the excessive tiredness is at its worst.
I was fully operational for two shifts, had a weeks leave and announced I was pregnant - so went straight back onto restricted duties!
Four years later and I work part time now, days and lates - I think I would find full time and nights too much although I work three 10 hours shifts each week.
I kept saying if I had a physical injury it wouldn't be so bad but the illness is invisible and I felt that my colleagues thought I was faking it because of how they treated me.
Anyway, two months ago I had a total thyroidectomy - due to a what I thought was a nodule growing. It turned about to be a tumour and within the thyroid was some cancer. I've had a different Sgt and Insp for a while, but they and everyone else have been totally different - once the lump in my neck became very visible and the mention of surgery. Just waiting to get the meds balanced again!