The first step is to find the cause and remove it. Symptomatic treatment is often with antihistamine receptor H1 antagonists. For patients who are persistent and ineffective with antihistamine receptor antagonists, antihistamine receptor H2 antagonists such as cimetidine (methamphetamine) or lantipyrine can be used in combination, sometimes with satisfactory results. Ketoprofen may also be used in combination. Sympathomimetic drugs are mainly used for acute urticaria and/or neuroedema, especially in patients with laryngeal edema. 0.1% epinephrine is administered subcutaneously, or at 20-30 minute intervals for severe acute allergic reactions. Also give glucocorticosteroids intravenously and aminophylline orally or intravenously. For episodes of edema in the respiratory tract, especially in the larynx, tracheotomy or intubation should be performed if necessary to keep the respiratory tract open. Diminished activity androgens such as danazol, stanozolol (Conradron), and hydroxymetenolone (Rehablon) for congenital C1INH deficiency can correct its biochemical deficit and have the effect of preventing attacks, but they cannot be used in pediatric patients and pregnant women, who can only use antifibrinolytic drugs such as 6-aminohexanoic acid, which can sometimes control natural attacks.