zuzu8

I agree with Lenin...
Absolutely, the doctor(s) should be taking your mother's resistant/uncontrolled BP very seriously, particularly in light of the fact that she has now suffered a stroke.

Usually, when a patient has refractory hypertension, it's absolutely essential for the docs to investigate thoroughly why this is happening.

First of all, and most obvious is to investigate if her drug regimen is appropriate.
By definition, resistant hypertension is when BP cannot be controlled following a regimen of no less than three BP meds from different classes, including an oral diuretic in near maximum doses.

Her doc should be looking for inappropriately low dosages or for inappropriate combinations.... (eg, two agents in the same class, or multiple drugs but no oral diuretic).

Also important is making sure your mother is compliant. Is she fastidious about taking her meds? And taking them as directed?

Is her general practitioner dealing with her meds or is she seeing a hypertension specialist? (oftentimes this would be a cardiologist).

Other things to take into consideration are possible drug interactions.
Nonsteroidal anti-inflammatory drugs (NSAIDs) like Advil etc can cause sodium retention, and antagonize the effects of all antihypertensive agents, (except maybe not with calcium channel blockers). Also in and of themselves, they tend to increase BP... (average, 4 to 5 mm Hg).
Over-the-counter nasal sprays, oral decongestants, and appetite suppressants often contain "vasoactive" compounds (like pseudophedrine) which can cause BP to rise and definitely interfere with her drugs if taken often.

Some antidepressants can interact with some BP meds particularly beta blockers. Regular use of corticosteroids can cause salt and water retention, which can raise BP.

ALSO, has her doctor run thorough tests to rule out secondary hypertension???

If there is a secondary cause, all the BP meds in the world won't work.

Things to rule out: Cushing's syndrome, pheochromocytoma (tumor of the adrenal gland(s), primary aldosteronism, kidney disease, thyroid disease.

Please don't think I'm nosy but does she drink alcohol? Smoke? Both these factors are important, particularly the former if excessive.

Is she obese or overweight?
Is she diabetic?
Again, both contribute to hard-to-manage Bp.

Hypertension that is really- truly-completely refractory to treatment is really very rare....So it seems like either her present doctor or, [if you are concerned about this one's nonchalance], a NEW one, should be delving much deeper.

zuzu xx