- An adverse allergic reaction to a medication.
- There are two major types of drug reactions: Immediate and Delayed.
- Immediate reactions include hives, flushing, swelling, throat tightness, wheezing, shortness of breath, nausea, vomiting, feeling light-headed and other symptoms.
- Immediate reactions can be life-threatening.
- Delayed reactions are typically less serious and result in a rash that can occur days after taking a medication.
- Delayed reactions are generally not life-threatening.
- Allergists help identify drug allergies through skin testing, blood testing, and oral challenges so that patients may continue to use medication safely.
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