If you are experiencing a medical emergency please dial 911 immediately
An allergic reaction to medicine can cause hives. They appear as raised, red, itchy bumps (wheals) of different shapes and sizes, with defined red margins and pale centers. Hives may appear and then disappear at random and seem to move from place to place on the skin.
An allergic reaction to medicine can also cause a rash that looks like measles.
Last Revised: June 17, 2013
Author: Healthwise Staff
Medical Review: Adam Husney, MD - Family Medicine & Rohit K Katial, MD - Allergy and Immunology
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