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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


Abnormal CO2 levels in the blood may mean that a patient is losing or retaining fluid, according to MedlinePlus. This may imbalance the patient's electrolytes, which are minerals in the body fluids that carry electric charges and help regulate metabolism.


High CO2 levels in the blood mean that the body may be experiencing respiratory or metabolic acidosis, conditions in which the blood’s pH level is excessively acidic. High levels of CO2 develop in the blood if the lungs or kidneys are unable remove excess CO2 from the body, states Healthline.


The normal range of carbon dioxide levels in the blood is 23 to 29 milliequivalents per liter, according to MedlinePlus. Sometimes other units might be used, in which case the normal range is 23 to 30 millimoles per liter, reports WebMD.


Some symptoms of high levels of carbon dioxide in the blood are drowsiness, inability to concentrate and headache, according to About.com. In more severe cases of high carbon dioxide, also known as hypercapnia, symptoms include flushed skin, dizziness, muscle twitches, increased blood pressure and r


A normal value for a carbon dioxide blood test is between 23 and 29 mEq/L, according to the U.S. National Library of Medicine. The severity of an abnormal test result is dependent on the underlying condition in the patient.


Addison's disease, lactic acidosis, kidney disease, diarrhea and ethylene glycol poisoning are causes of low CO2 blood levels, according to MedlinePlus. Seizures, cancer, diabetic ketoacidosis and hyperventilation are also causes, claims Healthline.


The normal CO2 or carbon dioxide levels in the body range from 23 to 29 milliequivalent units per liter of blood, according to Healthline. The test for CO2 determines the level of bicarbonate, which is the chemical that balances the pH of blood, notes WebMD.


Normal CO2 or carbon dioxide levels are between 23 to 30 mEq/L in humans, according to WebMD. However, this is just a reference point as normal ranges vary from lab to lab. The lab report given should contain the normal range for that particular lab.


The normal range for a carbon dioxide blood test is 23 to 29 milliequivalent units per liter, explains Healthline. Normally, doctors order a blood pH level test along with a CO2 blood test. A pH test measures alkalinity or acidity of the blood and helps determine the cause of symptoms.