The daisy-like flower of this herb is dried and used as tea or in an extract.
Chamomile is generally considered safe. The most likely side effect is an allergic reaction. Allergic reactions may include skin irritation, itchy eyes, sneezing, and runny nose. People very rarely have a severe and life-threatening allergic reaction (anaphylaxis). In high doses, chamomile may lead to drowsiness, sedation, and vomiting.
Chamomile may reduce the absorption of drugs taken by mouth. Chamomile may also increase the effects of drugs that prevent blood clots (anticoagulants) and sedatives (including alcohol) and decrease the absorption of iron supplements.