The symptoms of a drug allergy can range from mild to very serious. They include:
- Hives or welts, a rash, blisters, or a skin problem called eczema. These are the most common symptoms of drug allergies. See a picture of skin reactions caused by drug allergies.
- Coughing, wheezing, a runny nose, and trouble breathing.
- A fever.
- A serious skin condition that makes your skin blister and peel. This problem is called toxic epidermal necrolysis, and it can be deadly if it is not treated.
- Anaphylaxis, which is the most dangerous reaction. It can be deadly, and you will need emergency treatment. Symptoms, such as hives and trouble breathing, usually appear within 1 hour after you take the medicine. Without quick care, you could go into shock.
