Are you managing chronic urticaria/angioedema any differently if the patient is only/predominantly presenting with urticaria or angioedema?  

The mechanism is similar for urticaria and histamine-induced angioedema, so I would expect a similar response. The evidence to support the use of montelukast for U/A is slim, but there are some supporting data. Nonetheless, the newest WAO guideline does not suggest an addition to the therapeutic pyr...