Low blood pressure, also known as hypotension, is not considered a problem as long as no symptoms are present, according to the American Heart Association. However, a sudden drop in blood pressure, a condition known as orthostatic hypotension, can indicate an underlying problem, according to the University of Maryland Medical Center. Depending on the cause of the drop in pressure, this condition may be preventable.
Dehydration
Dehydration occurs when the body loses more fluid than it takes in. Common symptoms include dizziness, weakness and fatigue. A sudden drop in blood pressure can occur as a result of hypovolemic shock, a possible life-threatening complication of dehydration, which can result in death when left untreated, MayoClinic.com explains.
Loss of Blood
One of the most obvious reasons for a sudden drop in blood pressure is a major loss of blood from a traumatic injury such as a car accident or fall. Blood loss is a possible complication of surgery, and can also occur as a result of heart attack or stroke.
Septicemia
MayoClinic.com explains that septicemia occurs when an infection in another area of the body spreads through the bloodstream. This results in septic shock, a life-threatening, sudden drop in blood pressure.
Medications
Certain medications may cause a sudden drop in blood pressure, according to MayoClinic.com. These medications include water pills, blood pressure medications such as alpha and beta-blockers, medications for Parkinson's disease and some antidepressants. If a patient experiences this, he should tell his doctor, as a change in dosage or medication may be needed.
