(HealthDay News) -- Some drugs cause unpleasant side effects in many people, including nausea, dizziness or fatigue.
But if you're allergic to a drug, you can have a reaction that ranges from mild to life-threatening. Penicillin and other antibiotics are among the most common causes of drug allergy.
The U.S. National Library of Medicine lists these warning signs of an allergic reaction to a medication:
- Skin rash.
- Itchiness of the skin or eyes.
- Wheezing or difficulty breathing.
- Swollen lips, eyes or tongue.
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