Lactic acidosis is a condition caused by the buildup of lactic acid in the body. It leads to acidification of the blood (acidosis), and is considered a distinct form of metabolic acidosis.

The cells produce lactic acid when they use glucose for energy in the absence of adequate oxygen. If too much lactic acid stays in the body, the balance tips and the person begins to feel ill. The signs of lactic acidosis are deep and rapid breathing, vomiting, and abdominal pain. Lactic acidosis may be caused by diabetic ketoacidosis or liver or kidney disease, as well as some forms of medication (most notably metformin).

The Cohen-Woods classification (1976) categorises causes of lactic acidosis as follows:

• Type A: Decreased perfusion or oxygenation
• Type B:
  • B1: Underlying diseases (sometimes causing type A)
  • B2: Medication or intoxication
  • B3: Inborn error of metabolism

References

• Cohen R, Woods H. Clinical and Biochemical Aspects of Lactic Acidosis. Blackwell Scientific Publications; 1976. ISBN 0632094605.