Chiropractic Adjustments and High Blood Pressure One-third of the adult population, around 70 million Americans, have high blood pressure (hypertension). In addition, 1 in 3 Americans has prehypertension, which means higher than normal blood pressure numbers. Even more alarming: 1 in 5 adults with high blood pressure do not know they have it, because typically there are no associated symptoms. Thankfully, chiropractic offers a drug-free approach to treating high blood pressur