Mineralocorticoid replacement for adrenal insufficiency
The aims of mineralocorticoid therapy for adrenal insufficiency are to maintain:
- normal blood pressure (to avoid syncope)
- serum sodium and potassium concentrations in the normal range
- plasma renin concentration at the upper end of the normal range.
A moderately elevated plasma renin concentration is common and is acceptable if symptoms are well controlled. A low plasma renin concentration suggests overtreatment.
For mineralocorticoid replacement for adrenal insufficiency in an adult, use:
fludrocortisone 100 micrograms orally, daily. Adjust dose according to postural blood pressure, and serum potassium and plasma renin concentrations. Usual dose 50 to 300 micrograms daily. adrenal insufficiency (adult) fludrocortisone
The dose requirement of fludrocortisone in children varies significantly—it should be started and titrated by a specialist. The usual maintenance dose in a child is:
fludrocortisone 50 to 200 micrograms orally, daily. adrenal insufficiency (child) fludrocortisone
Infants may need a higher fludrocortisone dose in the first few months of life.
Acute adjustment of the mineralocorticoid dose is not required for stress or intercurrent illness.