Treatment-resistant or hard-to-control high blood pressure
When is high blood pressure considered treatment-resistant?
High blood pressure is called treatment-resistant when the agreed target is not reached despite treatment with three different blood pressure medicines.
What can cause this?
In about 30% of cases classified as treatment-resistant, the cause is actually secondary hypertension. In these cases, high blood pressure is caused by another disease or by medications. Its important to find the cause. If another condition is present, it must be treated first. Other medications the patient is taking should also be checked and possibly changed.
Likewise, the types or combinations of blood pressure drugs used so far and the way they are taken can be the reason the blood pressure isnt lowered enough. Depending on any other conditions the patient has, the blood pressure medicines should be chosen from the appropriate drug classes, and the dosing schedule should take the drugs duration of action (half-life) into account.
Pseudoresistance
There are also factors that can make high blood pressure look hard to control even though there is no true treatment resistance. This is called pseudoresistance.
White-coat hypertension
Your blood pressure can be higher at the doctors office than in everyday life; this is called white-coat hypertension. A 24-hour blood pressure measurement or regular home self-measurements can provide more clarity. See also "White-coat hypertension".
Measurement errors
Home blood pressure measurements can also be a source of pseudoresistance if values are falsely high because of measurement errors. See also "Errors when measuring blood pressure".
Lack of adherence
Another common reason for apparent treatment resistance is poor adherence (see also "Adherence and compliance). If the lifestyle changes discussed with the doctor which are the most important part are not followed, or the prescribed blood pressure medicines are not taken or not taken according to the plan, its not surprising that blood pressure doesnt fall. A Canadian study showed this: participants thought to have treatment-resistant hypertension had to take their medications under supervision. Blood pressure fell in all participants; about one third even reached the normal range. Half of the participants had already suffered a cardiovascular event related to high blood pressure. Sadly, even that was not enough motivation for everyone to take their medicines regularly as prescribed.
What to do about hard-to-control high blood pressure?
Even with hard-to-control high blood pressure, its essential to review and, if needed, optimize your lifestyle. Thats the good news you can personally work on diet, exercise, stress reduction, and cutting back on alcohol and nicotine. And of course medicines should be taken regularly as prescribed by the doctor.
If its secondary hypertension, the underlying disease must be treated in order to get the blood pressure under control.
If blood pressure remains high despite perfect adherence and all efforts to lower it, there are additional drug treatments and procedures available, such as renal denervation (see also "High blood pressure and the kidneys") or the implantation of a special pacemaker (see also "Pacemakers for people with hypertension"). Which option is suitable must be discussed individually with the treating physician.
Sources:
- https://aerztezeitung.at/2017/oaz-artikel/medizin/therapieresistente-hypertonie-pseudoresistenz-priv-doz-michael-rudnicki-univ-prof-bruno-watschinger/
- https://www.pharmazeutische-zeitung.de/die-resistenz-die-keine-ist/
- https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2735985
- https://www.patienten-information.de/patientenleitlinien/bluthochdruck
- https://jamanetwork.com/journals/jamainternalmedicine/article-abstract/2815018
- https://www.pharmazeutische-zeitung.de/spironolacton-am-wirksamsten-145440/
- https://www.patienten-information.de/patientenblaetter/bluthochdruck-nichtansprechen
- https://www.hochdruckliga.de/pressemitteilung/neue-optionen-bei-therapieresistenz-zertifizierung-renale-denervierungszentren
- https://www.thieme-connect.com/products/ejournals/pdf/10.1055/a-1031-0612.pdf
- https://www.medical-tribune.de/medizin-und-forschung/artikel/die-therapieresistente-hypertonie-ist-manchmal-gar-keine
- https://www.rosenfluh.ch/media/arsmedici-dossier/2010/04-05/Therapieresistente_arterielle_Hypertonie.pdf
- https://idw-online.de/de/news681153
This article comes from BloodPressureDB – the leading app since 2011 that helps hundreds of thousands of people monitor their blood pressure every day.
Our content is based on carefully researched, evidence-based information and is continuously updated (as of 11/2025).
Author Sabine Croci is a certified medical assistant with many years of experience in internal medicine and cardiology practices as well as in outpatient care. Since 2015 she has led the editorial team at BloodPressureDB. With additional qualifications as a paramedic, first responder, and training in various therapy and emergency areas, she provides well-founded, practical, and reliably reviewed information.
Author Sabine Croci is a certified medical assistant with many years of experience in internal medicine and cardiology practices as well as in outpatient care. Since 2015 she has led the editorial team at BloodPressureDB. With additional qualifications as a paramedic, first responder, and training in various therapy and emergency areas, she provides well-founded, practical, and reliably reviewed information.
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