High blood pressure is defined as having a large amount of pressure, or tension, in the blood vessels that carry blood away from the heart. The pressure in the vessels as the heart contracts is called the systolic blood pressure. The pressure in the vessels as the heart relaxes is called
diastolic pressure. A blood pressure greater than or equal to 140 systolic over 90 diastolic is considered high. Some causes of high blood pressure include genetic factors and high salt intake. Complications of this disorder can include stroke, eye damage, heart disease, and kidney disease.
High blood pressure may be treated with medications called diuretics, or water pills. Diuretics work by using the kidneys to remove salt and water from the body. There are three types of diuretic medications: potassium-sparing, loop, and thiazide. Each type of diuretic works in a different part of the kidneys. Common side effects of diuretics include increased urination, mineral loss, and dizziness.