special subjects
Echinacea
Adverse Effects
Most adverse effects are mild and transitory; they include dizziness, fatigue, headache, and gastrointestinal symptoms. No other adverse effects are known. Theoretically,echinaceais contraindicated in patients with autoimmune disorders, multiple sclerosis, AIDS, tuberculosis, and organ transplants because it may stimulate T cells. Allergic reactions are possible in patients with allergies to ragweed, chrysanthemum, marigold, daisies, or related allergens. 