Patch testing describes a procedure to help identify what ingredients might irritate a person’s skin. Many skin care products contain chemicals that can cause an allergic reaction when a person ...

The time interval between initial drug eruption and patch testing was not reported. In a 1998 study conducted by Barbaud and colleagues, [17] 72 patients (mean age, 52 years) underwent patch ...

Dermatitis. 2007;18(2):63-77. Mayence and colleagues [23] also found a high frequency of positive patch-test reactions in a study of 11 patients (mean age, 51 years), most of whom had high drug ...