| AW | Abatement of event after product withdrawn |
| BE | Event recurred after product reintroduced |
| DR | Dose response observed |
| EX | Alternative explanations for the event available |
| IN | Event occurred after product introduced |
| LI | Literature reports association of product with event |
| OE | Occurrence of event was confirmed by objective evidence |
| OT | Other |
| PL | Effect observed when patient receives placebo |
| SE | Similar events in past for this patient |
| TC | Toxic levels of product documented in blood or body fluids |