Drug Allergy Symptoms

One or more of the following symptoms may occur during an allergic reaction:

• Skin rash
• Hives (urticaria)
• Fever
• Facial swelling
• Joint aches or swelling
• Tender lymph nodes
• Shortness of breath

Anaphylactic shock is the most dangerous allergic drug reaction. Anaphylaxis symptoms, which may begin soon after exposure to a drug, include:

• Tightening of, or a “lump” in, the throat that causes breathing difficulty
• Extremely low blood pressure
• Weak, rapid pulse
• Swelling of the lips, mouth and eyelids
• Nausea, vomiting, or diarrhea
• Dizziness or lightheadedness

If you experience any of these symptoms, contact a medical professional immediately, as you may need emergency care.