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| Types of angioedema | Histamine induced | Bradykinin induced |
|---|---|---|
| Causes |
-Allergy (anaphylaxis) -Non-allergic -Spontaneous (idiopathic) |
-Hereditary (HAE) -Acquired -Drug induced (e.g. ACEi) |
| Presence of urticaria | Possible | No |
| Onset | Rapid (min) | Slower (hours) |
| Duration | Hours | Days |
| Abdominal pain | Could happen | Frequent (by history) |
| Asthmatic response | Frequent | No |
| Hypotension | Common | No |
| Response to standard treatment (epinephrine, antihistamines, corticosteroids) | Effective | No or minimal response |
