What counts as resistant hypertension?

Blood pressure that remains above target despite three medications from different classes at appropriate doses, one of which is a diuretic, or blood pressure that is only controlled by taking four or more medications.

Why is my blood pressure different at home than at the office?

Both patterns are common and both matter. Readings that are high only in a clinical setting are described as white coat hypertension, while readings that look fine in the office but run high elsewhere are called masked hypertension and carry real risk. Home or 24 hour monitoring is how the two are told apart.

Can high blood pressure damage my kidneys without any symptoms?

Yes, and it usually does. Damage from sustained high pressure accumulates quietly over years, which is why kidney function and urine protein are checked periodically in anyone with hypertension rather than waiting for a symptom to appear.

Hypertension

Resistant and complex hypertension care

When blood pressure will not come down on three medications, the answer is usually a cause that has not been found yet.

Last updated August 28, 2026

When does high blood pressure need a specialist?

High blood pressure and kidney disease drive each other in a loop: sustained pressure damages the small vessels that do the filtering, and kidneys that are not working well make pressure harder to control. A nephrologist is the specialist for the harder end of that spectrum, which means blood pressure that stays high despite three or more medications, blood pressure caused by an underlying condition rather than occurring on its own, and blood pressure in anyone who already has reduced kidney function.

When should high blood pressure be referred to a specialist?

Most high blood pressure is managed well in primary care. A referral makes sense when readings stay above goal on three medications including a diuretic, when pressure is controlled only with four or more drugs, when it appeared suddenly or at an unusually young age, when readings swing widely, when side effects keep forcing changes, or when kidney function has started to decline alongside it.

How do you find the cause instead of just adding another pill?

The first step is confirming what your blood pressure actually is outside the office, using home readings or ambulatory monitoring over 24 hours. Office readings alone mislead in both directions: some people read high only in a clinical setting, and others read normal in the office while running high the rest of the day.

From there the search is for a treatable cause. That includes a careful review of medications and supplements that raise blood pressure, laboratory testing of kidney function and electrolytes, and screening for specific conditions such as primary aldosteronism, narrowing of the arteries to the kidneys, thyroid disorders, and obstructive sleep apnea. Identifying one of these often changes treatment completely.

How do you build a blood pressure plan that holds?

Effective treatment is usually less about more medication and more about the right combination, at the right doses, taken at the right time of day. Alongside that sit the changes that genuinely move the number: reducing sodium, moderating alcohol, weight and activity, and treating sleep apnea where it is present.

Home monitoring is part of the plan rather than an afterthought. Regular readings taken correctly at home give a far more reliable picture than occasional office visits, and they let doses be adjusted with confidence.

How do you protect the kidneys at the same time?

For patients who already have kidney disease, blood pressure treatment is also kidney treatment. Drug choice takes into account the effect on protein in the urine, not just the pressure reading, and targets are often tighter than for the general population.

When should you ask for a nephrology referral?

Any of the following is a reasonable reason to be seen. If you are unsure, call the office and we will help you work out whether an appointment makes sense.

Blood pressure above goal despite three medications, one of which is a diuretic
Blood pressure controlled only on four or more medications
High blood pressure that started before age 30 or came on abruptly
Low potassium alongside high blood pressure
Repeated side effects that keep interrupting treatment
High blood pressure together with reduced kidney function or protein in the urine

Common questions

What counts as resistant hypertension?: Blood pressure that remains above target despite three medications from different classes at appropriate doses, one of which is a diuretic, or blood pressure that is only controlled by taking four or more medications.
Why is my blood pressure different at home than at the office?: Both patterns are common and both matter. Readings that are high only in a clinical setting are described as white coat hypertension, while readings that look fine in the office but run high elsewhere are called masked hypertension and carry real risk. Home or 24 hour monitoring is how the two are told apart.
Can high blood pressure damage my kidneys without any symptoms?: Yes, and it usually does. Damage from sustained high pressure accumulates quietly over years, which is why kidney function and urine protein are checked periodically in anyone with hypertension rather than waiting for a symptom to appear.