Main article: Matricaria chamomilla Preliminary research suggests chamomile is an effective therapy for anxiety. A 2009 study by Srivastava, et al., published in "Life Sciences", found chamomile caused cell reactions similar to that of nonsteroidal anti-inflammatory drugs. Chamomile can help the inflammation associated with hemorrhoids, but only applied topically, and not when consumed as a tea.It has shown anti-inflammatory effects in the laboratory and in animals.
Chamomile extract was shown to possessanti-inflammatory, antihyperglycemic,antigenotoxic, and anticancer properties in vitro and in animal studies. Apigenin, a flavone present in chamomile, has strong chemopreventive effects.Bisabololoxide A, another constituent of chamomile, was shown to reduce the dose of 5-fluorouracil when used together against leukemic cells.
The National Center for Complementary and Alternative Medicine cautioned of rare allergic reactions (Asteraceae allergy) and/or atopic dermatitis (skin rash).