If a patient has hives with no other systemic symptoms ... An amoxicillin rash that is not caused by an allergic reaction is ...

To date, only three patients have been reported to develop systemic allergic reactions to PFO occluders without apparent rash but with positive patch-test results. [95–97] Each of these patients ...

Of 38 patch-test reactions, 15 (39% ... patients with a history of a maculopapular rash (6 of 13) showed a positive reaction to at least one systemic antibiotic on patch testing.