Paroxysmal hypertension

Sudden onset of paroxysmal hypertension began one year ago. I have absolutely no contributory factors, lifestyle or other diseases (save for isolated Raynaud's syndrome diagnosed 10 years ago). Tested negative, plasma and urine, for pheochromocytoma.

Been on various medication therapies: first lisinopril alone, then lisinopril, thiazide, metoprolol, then added clonidine; after that, sular, coreg, aldactone, clonidine, lasix, and tekturna. BP spiking continued at variable times of the day late morning, mid to late afternoon, and evening. BP dips 10% during sleep as measured by ABPM.Typical max levels of 210/115. (Spikes not caused by clonidine withdrawal because initial therapy did not include clonidine, and dosing clonidine never exceeded 12 hours apart.)

Recently added reserpine with good improvement. I believe episodes are best described as Page's Syndrome--characteristic blotchy red forehead, severe headache, elevated blood pressure, cold hands and torso, feverish, chills, and stomach churning. No anxiety. More like bouts of the flu.

Male 53 yrs. old.

Comments or advice welcome.