• Eyes, ears, nose, and throat
  • Loss of vision
  • Severe pain in the throat
  • Severe pain or burning in the nose, eyes, ears, lips, or tongue
• Gastrointestinal
  • Blood in the stool
  • Burns of the food pipe (esophagus)
  • Severe abdominal pain
  • Vomiting
  • Vomiting blood
• Heart and blood
  • Collapse
  • Low blood pressure
  • Methemoglobinemia (very dark blood from abnormal red blood cells)
  • Too much or too little acid in the blood, which leads to damage in all of the body organs
• Kidneys
  • Kidney failure
• Lungs and airways
  • Breathing difficulty
  • Throat swelling (may also cause breathing difficulty)
• Skin
  • Burns
  • Irritation
  • Holes (necrosis) in the skin or tissues underneath

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Review Date: 01/30/2010
Reviewed By: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)