Fludrocortisone primarily addresses chronic mineralocorticoid deficiency and orthostatic hypotension. Acute dehydration should be managed with fluid replacement; fludrocortisone is not a first-line treatment for short-term volume loss.
Ankle edema may indicate fluid retention or excessive dosing. Contact your prescriber to discuss possible dose reduction or the addition of a diuretic, if appropriate.
A low-sodium diet can counteract the intended sodium-retaining effect of fludrocortisone, potentially leading to inadequate blood pressure control. Discuss dietary plans with your healthcare provider.
Fludrocortisone provides mineralocorticoid activity (sodium retention), whereas cortisol (hydrocortisone) replaces glucocorticoid activity (glucose metabolism, stress response). Both are often needed in primary adrenal insufficiency.
Because fludrocortisone raises blood pressure, it may cause a temporary elevation in readings during screening. Your clinician should interpret results in the context of your medication regimen.
Manufacturers may use different imprints such as “FLU 100” or “F 100”. Verify the specific imprint on your prescription bottle and report any discrepancies to your pharmacist.
Fludrocortisone is not typically included in routine occupational or anti-doping screening panels, but disclosure to the testing authority is recommended if a test is required.
Carry the medication in its original labeled container, bring a copy of the prescription, and keep it in your carry-on luggage to avoid temperature extremes and loss.
Patients usually notice a gradual improvement within 3-5 days, with maximal stabilization achieved after 2-4 weeks of consistent dosing.
An isolated extra dose may cause temporary mild hypertension or electrolyte shift, but it is unlikely to be dangerous. Monitor blood pressure and contact your healthcare provider if you experience severe symptoms.
Fludrocortisone (fludrocortisone acetate) is a synthetic mineralocorticoid hormone used in hormone therapy. It is available as a 100 mcg oral pill and is prescribed by a qualified healthcare professional. In Hong Kong, fludrocortisone is a prescription-only medication regulated by the Hong Kong SAR Department of Health and the Pharmacy and Poisons Board.
Fludrocortisone mimics the action of the natural mineralocorticoid hormone aldosterone, which helps the kidneys retain sodium and excrete potassium. By binding to mineralocorticoid receptors in the distal tubules and collecting ducts of the kidneys, it:
The onset of action is typically within hours after a dose, with the full effect on electrolyte balance and blood pressure developing over several days of consistent therapy. Fludrocortisone is well absorbed from the gastrointestinal tract, has a moderate half-life of about 30-50 hours, and is metabolized primarily in the liver before renal excretion.
Fludrocortisone is approved for the following indications in Hong Kong and many other jurisdictions:
These uses are supported by guidelines from endocrine societies and the Hong Kong Department of Health.
If any of these serious symptoms occur, seek medical attention promptly.
Patients should inform their healthcare provider of all prescription drugs, over-the-counter products, supplements, and herbal preparations before starting fludrocortisone.
This article provides educational information about fludrocortisone and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.
