What are the side effects of kava?

What are the possible side effects of kava ()? Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.Stop taking kava and seek emergency medical attention if you have liver symptoms such as nausea, stomach pain, loss of appetite, itching, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes).Other less serious side effects have also been reported. Talk to your doctor, pharmacist, or health care professional if you experience
  • morning drowsiness,
  • changes in vision, or
  • upset stomach.
Kava should not be used for longer than three months without a doctor's supervision. The long-term use of kava has reportedly lead to "kawanism", which is characterized by dry, flaking, discolored skin; reddened eyes; a scaly skin rash; puffy face; muscle weakness; blood abnormalities; and feelings of poor health.This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.