Reversible postural tachycardia syndrome due to inadvertent overuse of Red Bull

Postural tachycardia syndrome associated with a vasovagal reaction was recorded in a young volleyball player after an excess intake of Red Bull as a refreshing energy drink. Considering the widespread use of Red Bull among young people who are often unaware of the drink's drug content, this case report suggest Red Bull be considered a possible cause of orthostatic intolerance.