A diagnostic test in which drugs, chemicals, allergens, or physical forces are systematically administered to reproduce symptoms, in order to discover the source of a symptom or the tissue origin of a lesion. Provocation tests are used by specialists in several fields of health care, such as: allergists, to determine which of several agents may produce a patient’s rhinitis, wheezing, or rash; physical therapists, to identify relationships between a patient’s tissue pathology or impairment and his or her functional limitations; and cardiologists and neurologists, who use tilt table provocation tests to diagnose the cause of a patient’s loss of consciousness.