Health benefits of echinacea: May strengthen immunity May ease cold symptoms May reduce blood sugar levels May promote tranquility More benefits Things To Know & Note It is a: Herb Available as: Tablets, tinctures, tea Also known as: Purple coneflower, Echinacea purpurea Traditional uses: Immunity support, cold relief Drug interactions: Warfarin, caffeine, darunavir, docetaxel Most common side effect: Stomach pain, constipation, diarrhoea, heartburn, vomiting, rash Echinacea is likely safe for most people in the short-term. Various echinacea products have been used safely for up to 10 days. Don't give echinacea to children under 12 years of age. Recent Posts