Does echinacea cause any side effects?
Minor side effects can include an upset stomach, nausea and dizziness. Serious side effects can include worsening of asthma symptoms and allergic reactions such as rash, swelling and difficulty breathing. If you have a history of an allergy to daisies, ragweed, marigolds, chrysanthemums or related plants, you may be more at risk of having an allergic reaction to echinacea. Talk to your doctor right away about any side effects you are having.