Comparatively mild to moderately severe T cell-mediated delayed onset ( usually more than 24 hour ), skin reactions such as maculopapular rash, fixed drug eruptions, photosensitivity reactions, delayed urticaria, and contact dermatitis; or "'3 ) "'far more severe and potentially life-threatening t-cell-mediated delayed systemic reactions such as the DRESS syndrome, acute generalized exanthematous pustulosis, the Stevens Johnson syndrome, and toxic epidermal necrolysis.