The term "iatrogenic" refers to a medical treatment which causes a problem. It's not uncommon for people prescribed high blood pressure medications to end up with blood pressure which is too low. Some people have higher blood pressure when they are in the clinic (something that is called white coat hypertension ) due to anxiety. When this occurs, medications may end up being prescribed which result in blood pressure that is too low outside the clinic. Ambulatory blood pressure monitoring (checking blood pressure outside the stressful setting of the clinic) may be needed to know how aggressive to be in treating high blood pressure to avoid inadvertently causing low blood pressure.