Blue urticaria following Patent Blue V and morphine injections

Abstract

Abstract We present a patient with a non‐IgE‐mediated urticaria reaction to the morphine injection which was tinted blue due to prior injection of Patent Blue V dye into her left breast. Clinicians should be aware of these types of reaction to morphine.

Keywords

• direct histamine release
• morphine injection
• non‐IgE‐mediated localized reaction
• Patent Blue V