Drug rashes are the body's reaction to a certain medication. The type of rash that occurs depends on the type of drug that is causing it.
Rashes can range from mild to severe.
Diagnosing a rash caused by a reaction to medication is complicated. Even a small amount of a certain drug can cause a major reaction in the skin. In addition, the reaction can occur long after the patient took the particular medication and symptoms may last for months. Your physician will usually advise you to stop taking any medication that is not necessary to sustain your life, to see if the reaction abates. Other medications may be substituted, if possible.