Preventive (or “prophylactic”) therapy is ongoing treatment you take to prevent HAE attacks. Your doctor may recommend this type of ongoing treatment if you experience frequent or severe attacks, or if your lifestyle is dramatically impaired by HAE.
On-demand (or “acute”) therapy is used to treat HAE attacks as they occur. This type of treatment can help reduce the severity and duration of HAE attacks. People with HAE should always have ready access to their on-demand therapy
When there's swelling in the throat (laryngeal edema), emergency care is needed to quickly control the swelling and protect the airways. Anyone experiencing a laryngeal attack should seek immediate medical attention.
TIP: Neither corticosteroids nor antihistamines have been shown to have any real effect on HAE attacks.