The prevalence of CM adverse reactions was as low as 1.05%. Risk factors consist of a history of previous CM reactions, female gender and seafood allergy. Nevertheless, serious immediate reactions could occur particularly in patients with asthma.
Non-steroidal anti-inflammatory drugs and antibiotics were the most common drugs causing angioedema without urticaria. The duration of onset ranged from minutes to days. After stopping the suspected drugs, symptoms disappeared within 2-5 days in most patients.
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