Free great handout on DRESS - Drug Reaction With Eosinophilia and Systemic Symptoms. May affect adults or children; usually 2 to 8 weeks after beginning a medication. ~1 in 1000 taking specific drugs get DRESS. Allopurinol is a common cause https://t.co/X8lHtGVunC https://t.co/OjCzUXWJcz