| Physiological effect | Clinical expression | Danger |
| Capillary leakage | Urticaria | |
| Angio-oedema | ||
| Laryngeal oedema | Asphyxia | |
| Hypotension | Shock | |
| Mucosal oedema | Laryngeal oedema | Asphyxia |
| Rhinitis | ||
| Asthma | Respiratory arrest | |
| Smooth muscle contraction | Asthma | Respiratory arrest |
| Abdominal pain |
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