I take synthroid for my low thyroid and recently had surgery for sinus problems. My ENT put me on steroids to control swelling. The mood swings were bad and I got absolutely no sleep to the point he had to take me off after one week.
I went for a blood draw for my thyroid one week after being on steroids and the levels came back "wacky". My regular doctor wanted to know if I had been skipping medicine and I have not. I did tell the nurse that I have been on steroids for a week but the nurse said that makes no different. This article says differently and describes some of the things I was going through and the blood test confirm in my opinion.
I haven't had a "wacky" blood result in a few years and that only difference is the steroid use post-op. I wish more doctors would look at this stuff instead of just accusing the patient of missing meds or doing something different.