• Bladder and kidneys
  • Cloudy urine
  • Frequent urination
  • Increased urine output
• Eyes, ears, nose, mouth, and throat
  • Dry, cracking lips (from chronic overdose)
  • Eye irritation
  • Increased sensitivity of the eyes to light
• Heart and blood
  • Irregular heartbeat
  • Rapid heartbeat
• Muscles and joints
  • Bone pain
  • Joint pain
  • Muscle pain
  • Muscle weakness
• Nervous system
  • Confusion
  • Convulsions (seizures)
  • Fainting
  • Fatigue
  • Headache
  • Mental changes
  • Mood changes
  • Irritability
• Skin and hair
  • Flushing from niacin (vitamin B3)
  • Dry cracking skin
  • Itching, burning skin, or rash
  • Yellow-orange areas of skin
  • Sun sensitivity (more likely to sunburn)
  • Hair loss (from long-term overdose)
• Stomach and intestines
  • Appetite loss
  • Constipation (from iron or calcium)
  • Diarrhea
  • Nausea and vomiting
  • Stomach pain
  • Weight loss (from long-term overdose)

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Multiple vitamin overdose Overview

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Multiple vitamin overdose Treatment

Review Date: 10/01/2009
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)