Chamomile has been used as a traditional medicine for thousands of years to calm anxiety and settle stomachs. In the U.S., chamomile is best known as an ingredient in herbal tea. Chamomile is considered a safe plant and has been used in many cultures for stomach ailments and as a mild sedative. Some studies, primarily using combinations of chamomile with other plants, show it may have health benefits. However, as with any combination product, it is hard to say that a benefit comes from any one plant. One product with chamomile and other herbal medicines has been shown to ease upset stomach, heartburn, nausea, and vomiting. Another mixture with chamomile seems to help colicky babies.