| Asthma |
| Delayed or no epinephrine |
| Cardiopulmonary diseases |
| Upright posture during anaphylaxis |
| Initial misdiagnosis |
| Systemic mastocytosis |
| Other atopic conditions |
| Carelessness with regard to exposures to known triggers, especially food (ignoring advisory labeling) and medications (including iatrogenic medication errors) |
