This drug may cause a severe allergy in some diseaseds. This reaction usually occurs within 6 weeks after the drug is started but may occur at any time. If untreated, it can lead to severe low blood pressure and even death Stop taking this drug and check with your family doctor immediately if you notice sudden fever, skin rash, diarrhea, nausea, stomach pain, vomiting, or a feeling of unusual tiredness or illness, cough, shortness of breath, or sore throat.
When you begin taking this drug, you will be given a warning card which describes symptoms of severe allergys that may be causing by abacavir. The warning card also provides information about how to treat these allergic reactions. For your safety, you must carry the warning card with you at all times.