title: Anaphylaxis due to caffeine.
abstract: We report a rare case of anaphylaxis due to caffeine intake. A 27-year-old woman suffered her first episode of anaphylaxis and a positive skin prick test suggested that the anaphylaxis was due to an IgE-mediated hypersensitivity reaction to caffeine. She was diagnosed with caffeine allergy and has not had an allergic reaction after avoiding foods and drinks containing caffeine. Although caffeine is known to have antiallergic effects, this case shows that caffeine can be an allergen and cause anaphylaxis.
authors: Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Kumiya
authors: K
authors: Sugiyama
authors: Moka-Seibu Clinic, Moka 321-4364, Japan.
authors: Tatsurai
authors: T
authors: Cho
authors: Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Masamitsu
authors: M
authors: Tatewaki
authors: Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Shogo
authors: S
authors: Onishi
authors: Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Tatsuya
authors: T
authors: Yokoyama
authors: Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Naruo
authors: N
authors: Yoshida
authors: Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Takayoshi
authors: T
authors: Fujimatsu
authors: Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Hirokuni
authors: H
authors: Hirata
authors: Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Takeshi
authors: T
authors: Fukuda
authors: Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan.
authors: Yasutsugu
authors: Y
authors: Fukushima
keywords: Anaphylaxis; Caffeine; Food allergy
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