Figure 21.1 Patient with acute urticaria
This chapter deals with the management of a single isolated episode of urticaria (acute urticaria) rather than recurrent episodes observed in chronic urticaria. Discussion is restricted to randomised controlled trials (RCTs). The majority of the RCTs consider the most recently developed drugs. Earlier experimental work with the first antihistamines are not considered because they were not assessed formally in RCTs. It should be noted that many of the reported RCTs have been conducted in emergency departments. It is unclear whether such results also apply to ordinary practice.
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