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Table 3 Drugs affecting the results of skin tests

From: Diagnostic tools in Rhinology EAACI position paper

  Suppression Duration of Suppression (days)
Cetirizine, desloratadine, ebastine, levocetirizine, mizolastine ++++ 3-10
Chlorphenamine, promethazine ++ 1-3
Ketotifen ++++ >5
Imipramine ++++ >10
Inhaled steroids -  
Systemic steroids +/-  
Cimetidine/ranitidine -  
Antileukotrienes -