Addison's Disease Support Group
Addison's disease (also known as chronic adrenal insufficiency, or hypocortisolism) is a rare endocrine disorder. It is estimated that it affects about 1 to 2 in 100,000 people. It occurs when the adrenal glands, seated above the kidneys, fail to produce enough of the hormone cortisol and, sometimes, the hormone aldosterone
In non-ADs, cortisol levels naturally increase by ~5x's during illness, or stress. This natural increase halts progression of illness and aids in the healing process. Since we lack the automatic regulation of cortisol, the general the rule of thumb is to double your usual HC dose when ill, or highly stressed, which is exactly what your MD has advised.
Fludro mimics aldosterone and there is no association between aldosterone and illness. Therefore, there is no biological requirement for increased fludro, in and of itself. As Kristen said, you will be receiving additional fludro properties via increased HC. That should be effective for any intestinal upset. Taking additional fludro during illness, can actually exacerbate symptoms and/or cause new complications*.
I've increased HC by 7xs when acutely ill. I'm not recommending this, just making a point that a short increased course will not place you in harm's way. For me it does a good job and keeps me out of those awful hospitals! I resume my usual dose within 3-5 days and I have never experienced any adverse reaction.
It's wise to maintain proper hydration, get extra rest and make sure your a.m. temp doesn't exceed 101. Feel better Sinead.
*An Easier Fludro Analogy(?): We are not advised to carry Emergency Injectable Fludro, nor do ERs administer IV Fludro. However, both scenarios do include HC. So, double dosing with fludro is not advisable.