What are the allergic reactions to medications?

Dec 04, 2024 Source: Cainiu Health
Disease description:

I have been taking medication regularly recently, and have been breaking out in rashes after taking the medication a few days ago. A friend mentioned it might be a drug allergy, and I would like to know what the symptoms of a drug allergic reaction are.

Doctor's answer (1)
Dr. Liu Wenmin

Drug allergy refers to abnormal immune responses of the body to certain medications. These reactions can range from mild to severe and even life-threatening. Common drug allergy symptoms include:

1. Rash: This is the most common symptom of drug allergy, presenting as redness, bumps, or blisters, possibly accompanied by itching.

2. Urticaria: A sudden skin reaction characterized by red or skin-colored welts, which are usually itchy.

3. Angioedema: A rapidly occurring localized swelling commonly affecting the lips, eyes, and throat, which may lead to difficulty breathing.

4. Gastrointestinal reactions: Including nausea, vomiting, abdominal pain, diarrhea, etc.

5. Respiratory reactions: Such as wheezing, shortness of breath, coughing, sneezing, etc., with severe cases possibly developing into difficulty breathing.

6. Fever: Drug allergy may sometimes cause unexplained fever.

7. Decreased blood cell count: Certain medications may cause a reduction in white blood cells, red blood cells, or platelets.

8. Anaphylaxis: A severe allergic reaction that may cause a drop in blood pressure, difficulty breathing, rapid heartbeat, loss of consciousness, and requires immediate emergency treatment.

If a drug allergy occurs, prompt medical attention is recommended, and management should follow medical advice.