| Term | Definition |
| Allergy | state of abnormal and individual hypersensitivity acquired through exposure to a particular allergen |
| antibiotic premedication | provision of an effective antibiotic before invasive clinical procedures that can create a transient bacteremia, which, in turn, can cause infective endocarditis or other serious infection |
| bacteremia | presence of microorganisms in the blood-stream |
| drug interaction | a change in the effect of one drug when a second drug is introduced concomitantly; the change may be desirable, adverse or inconsequential |
| forensic | pertaining to or applied in legal proceedings |
| hematogenous | produced or derived from blood; disseminated through the bloodstream |
| immunocompromised | when the immune system response is attenuated by administration of immunosupressive drugs, by irradiation, by malnutrition, or by certain disease processes |
| informed consent | a medicolegal document that holds providers responsible for ensuring that patients understand the risk and benefits of a procedure or medication before it is administered |
| OTC | over the counter, nonprescription drug; pertains to distribution of drugs directly to the public without prescription |
| PDR | physician's desk reference; contains current information about the actions, side effects, and interactions of drugs; a new edition is published annually |
| premedication | preliminary medication; may be for the purpose of allaying apprehension, preventing bacteremia or otherwise facilitating the clinical procedure |
| SBE | subacute bacterial endocarditis; now called infective endocarditis |