What are the side effects of black haw?

What are the possible side effects of black haw ()? Although rare, allergic reactions to black haw may occur. Stop taking black haw and seek emergency medical attention if you experience symptoms of a serious allergic reaction including difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives.Large doses of black haw have been reported to cause
  • nausea,
  • dizziness,
  • seizures,
  • visual disturbances,
  • reduced pulse rate, and
  • increased sweating.
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.