Hi and thanks for the comments. Unfortunately, my Cortef shipment was seized by customs, so I'm back to trying Isocort again -hopefully tomorrow. I managed to get some thyroid tests run at a local clinic, which suggest a somewhat underfunctioning thyroid. I have not done any cortisol testing, but have many symptoms. By underarm test, I assume you're referring to basal temp. testing? Yes, I'm running quite low temps.