[Belated recurrence of anaphylactic reaction].

Anaphylaxis is a serious allergic reaction, and the incidence is increasing. A biphasic anaphylactic reaction with recurrent symptoms after a long period without any symptoms is described. Guidelines recommend adrenalin as first line treatment, but some patients are only treated with glucocorticoids and antihistamines. The importance of correct treatment with adrenalin, instructions in correct self administration with adrenalin after admission, and examination for allergies is underlined.