Sulfa Allergy Symptoms

Sulfa drugs are prescription antibiotics that contain sulfonamides to treat some bacterial and fungal infections. One of the most frequent uses of sulfa drugs is to treat urinary tract infections. In addition to avoiding sulfa-containing antibiotics, people with sulfa allergies should also avoid numerous other medications, including some anti-inflammatory drugs, migraine medications and some diuretics. Always make sure your doctor and pharmacist are aware of your allergy to help avoid reactions.

Anaphylaxis

• Anaphylaxis is a potentially life-threatening allergic reaction in which people experience difficulty breathing, a rapid heartbeat and nausea and vomiting that can progress to loss of consciousness. People who have an anaphylactic reaction need immediate medical treatment.

Skin

• Some people with a sulfa allergy will develop a rash or hives when taking sulfa drugs. A sensitivity to light is also possible.

Liver and Kidneys

• Taking sulfa-containing drugs can cause kidney failure and hepatitis in people with sulfa allergies. This generally occurs over a long period of time.

Respiratory Reactions

• Some people with sulfa allergies will develop wheezing or chest constriction if they take a sulfa-containing medication.

Stomach

• A sulfa allergy can cause stomach pain and mild nausea.

Eyes

• Many people with drug allergies, including sulfa allergies, develop itchy and watery eyes after taking a medicine containing an allergen.