What are the side effects of dandelion?

What are the possible side effects of dandelion ()? Although rare, allergic reactions to dandelion may occur. Stop taking dandelion 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.Other less serious side effects have also been reported with the use of dandelion. Talk to your doctor or health care provider if you experience
  • stomach upset or heartburn, or
  • a rash.
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.