Chamomile
An herb often used in the form of a tea as a sedative.
Allergic reactions to chamomile can occur, particularly in persons allergic to ragweed.
Reported reactions include abdominal cramps, tongue thickness, tightness in the throat, swelling of the lips, throat and eyes, itching all over the body, hives, and blockage of the breathing passages.
Close monitoring is recommended for patients who are taking medications to prevent blood clotting (anticoagulants) such as warfarin /Coumadin.