Fludrocortisone should be tapered gradually rather than stopped abruptly. The drug has a long duration of action (one to two days per dose) and a half-life of 18 to 36 hours, which means its effects linger but your body still needs time to adjust as the dose comes down. The specific tapering schedule depends on why you’re taking it, how long you’ve been on it, and how your blood pressure and electrolytes respond at each step.
Why You Can’t Just Stop
Fludrocortisone is a synthetic mineralocorticoid, meaning it mimics a hormone your adrenal glands normally produce to manage sodium, potassium, and fluid balance. While you’re taking it, your body partially relies on the drug for that regulation. Stopping suddenly can leave you without enough mineralocorticoid activity, leading to a drop in blood volume and blood pressure.
The symptoms of mineralocorticoid withdrawal mirror those of adrenal insufficiency: dizziness or lightheadedness when standing, muscle cramps, abdominal discomfort, salt cravings, and fatigue. In people with primary adrenal insufficiency (such as Addison’s disease), abrupt discontinuation carries the more serious risk of adrenal crisis, which involves severe low blood pressure, rapid heart rate, confusion, and potentially shock. Roughly 8% of people with adrenal insufficiency experience a crisis each year, and the main trigger is the fluid and electrolyte imbalance that comes from losing mineralocorticoid support.
How a Typical Taper Works
There is no single published protocol with exact milligram reductions and timelines, which is why tapering is done under medical supervision with bloodwork and symptom checks guiding each step. That said, the general approach follows a consistent pattern.
Most people on fludrocortisone take between 0.05 mg and 0.2 mg daily. Tapering usually involves reducing the dose by small increments, often 0.05 mg at a time, and holding at each new dose for one to several weeks before reducing again. The pace depends on your response. If your blood pressure stays stable and you feel well, the next reduction can proceed. If symptoms appear, the taper pauses or the dose steps back up temporarily.
Because fludrocortisone tablets are small (typically 0.1 mg), some people taper by switching from daily dosing to every-other-day dosing as a final step before stopping entirely. This takes advantage of the drug’s long duration of action, which spans one to two days per dose.
What Your Doctor Will Monitor
Two things matter most during a fludrocortisone taper: blood pressure and electrolytes.
Orthostatic hypotension, the condition fludrocortisone often treats, is defined as a drop in systolic blood pressure of at least 20 mmHg or diastolic pressure of at least 10 mmHg within three minutes of standing up. During your taper, checking your blood pressure while sitting and then again after standing for a few minutes gives you and your doctor the clearest signal of whether the current dose is still adequate. A home blood pressure cuff makes this easy to do daily.
Blood tests for sodium, potassium, and sometimes calcium are recommended for anyone on fludrocortisone for an extended period, and they become especially important during tapering. Low sodium (present in over 90% of people at the time primary adrenal insufficiency is diagnosed) and rising potassium are early biochemical signs that mineralocorticoid support is falling short. Your doctor will decide how frequently to check labs, but expect at least one blood draw at each dose reduction or every few weeks.
Tapering for Orthostatic Hypotension or POTS
If you were prescribed fludrocortisone for orthostatic hypotension or postural tachycardia syndrome (POTS) rather than adrenal insufficiency, your adrenal glands are still functional. This makes the taper somewhat lower risk because your body can resume producing its own mineralocorticoid once the external supply decreases. The main concern is the return of your original symptoms: dizziness on standing, fatigue, or fainting.
Data from a large observational study found that among patients who started fludrocortisone for orthostatic hypotension, the median time to discontinuation was about 268 days. Many people stop because side effects (such as ankle swelling, headaches, or high blood pressure while lying down) outweigh the benefits. If you’re tapering because the drug isn’t helping or is causing problems, a faster taper over a few weeks may be reasonable. If you’re tapering because your symptoms have improved, a slower approach helps confirm the improvement holds without the medication.
Tapering With Adrenal Insufficiency
For people with primary adrenal insufficiency, tapering fludrocortisone is a different calculation. Your adrenal glands cannot increase their own mineralocorticoid production to compensate, so you may not be able to fully discontinue the drug. Any dose reduction should be especially cautious, with close attention to standing blood pressure, electrolytes, and how you feel day to day.
The risk of adrenal crisis is real and potentially life-threatening. Signs to watch for include severe fatigue, nausea, vomiting, abdominal pain, confusion, and a blood pressure drop you can feel when you stand. If these develop during a taper, the dose should be increased back to the last level that kept you stable, and your doctor should be contacted promptly.
Symptoms to Watch During a Taper
- Dizziness when standing: the earliest and most common sign that your dose is too low
- Salt cravings: your body’s signal that sodium levels may be dropping
- Muscle cramps: can reflect shifting potassium levels
- Fatigue or weakness: often gradual, easy to dismiss, but worth noting
- Nausea or abdominal pain: may indicate a more significant mineralocorticoid deficit
Any combination of these symptoms, especially if they worsen quickly, warrants pausing the taper and rechecking with your prescriber.
Practical Tips for a Smoother Taper
Increasing your salt and fluid intake during a taper can partially offset the loss of fludrocortisone’s sodium-retaining effect. This is the same nonpharmacological strategy used to manage orthostatic hypotension before medications are even started. Drinking enough water and adding salt to meals won’t replace the drug, but it can soften the transition.
Compression stockings and avoiding prolonged standing are also worth revisiting during a taper, particularly if orthostatic symptoms were your original problem. These measures reduce blood pooling in the legs and help maintain blood pressure when mineralocorticoid support is being withdrawn.
Keep a simple daily log of your standing and sitting blood pressure, any symptoms, and the date of each dose change. This gives your doctor concrete data to work with at follow-up visits and helps you spot patterns early, like symptoms that reliably appear two or three days after a reduction, which may mean the step was too large or too fast.