Dragon Fruit (Pitaya) Allergy: Symptoms, Cross-Reactivity & Management

Dragon fruit (Hylocereus spp., family Cactaceae) is generally well-tolerated but can trigger IgE-mediated allergic reactions, including anaphylaxis, even on first known exposure.

Clinical Presentation

• Cutaneous: Urticaria, angioedema, pruritus.
• Respiratory: Dyspnea, wheezing, throat tightness.
• Gastrointestinal: Nausea, vomiting, abdominal pain.
• Cardiovascular: Hypotension, dizziness, syncope (anaphylaxis).

Cross-Reactivity

Sensitization to other Cactaceae (prickly pear, cactus pear) is possible. Profilin-mediated cross-reactivity and latex-fruit syndrome have also been implicated. Case reports describe sensitization without prior dragon fruit ingestion, suggesting pan-allergens.

Diagnosis

• Detailed history + skin prick test or specific IgE to dragon fruit extract.
• Oral food challenge (gold standard) in a controlled setting if history is equivocal.

Management

• Strict avoidance.
• Epinephrine auto-injector prescription and training.
• Antihistamines for mild cutaneous reactions only.
• Medical alert identification.

Illustrative Case

A 35-year-old female experienced anaphylaxis (urticaria, dyspnea, lightheadedness) on first exposure. Skin prick test positive. Treated with IM epinephrine, IV antihistamines/steroids. Discharged with auto-injector and avoidance counseling.