Hi, Thanks for your concerns. There have not been trials to test the efficacy of this natural remedy to lower high blood pressure,there is no way to predict the absorbtion and how you would react as. In contrast, there are many randomized medication trials of effectiveness. . There are medications of medications for high blood pressure. We know for a fact that the ones associated with less blood pressure variability are calcium channel blockers (like amlodipine, nifedipine, nicardipine) and diuretics (like chlorthalidone, hydrochlorothiazide, triamterene, furosemide, etc). The ones that are associated with highest variability are beta blockers and angiotensin enzyme inhibitor (lisinopril, enalapril, etc). If you are over the age of 65 and have high blood pressure, and are not on a calcium channel blocker... it would be less than ideal if you have no contraindication for these medications. Hope this is helpful, wish you the best health, remember, blood pressure control is the best insurance against stroke! Dr Brenes Salazar Cardiology Mayo Clinic Rochester