What causes high CO2 levels in the blood?


Quick Answer

Dehydration and overuse of antacids are among the conditions that cause high carbon dioxide levels in the blood, according to WebMD. High CO2 levels are also caused by vomiting, anorexia, chronic obstructive pulmonary disease, heart disease and pulmonary edema. Conn's syndrome and Cushing's disease also cause the condition.

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Full Answer

Cushing's disease or Cushing's syndrome is a disorder where the person has abnormally high levels of cortisone in the blood, claims WebMD. It can be caused if the person takes corticosteroids or by an adrenal gland tumor that forces the gland to make too much cortisol.

In Conn's syndrome, the body produces too much of a hormone called aldosterone, says the National Organization for Rare Disorders. This causes too much sodium in the blood and may also cause hypervolemia and a decrease in blood potassium.

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