Azulfidine

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Headache; loss of appetite; mild stomach upset or pain; nausea; vomiting.
Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); bloody diarrhea; bluish discoloration of the skin or nails; chest pain; dark urine; decreased urination; fever, chills, or sore throat; hearing loss; mental or mood changes; muscle pain; numbness or tingling in the fingers or toes; pale stools; persistent loss of appetite; pinpoint bruises; red, swollen, peeling, or blistered skin; seizures; severe or persistent dizziness, drowsiness, headache, or trouble sleeping; severe or persistent stomach pain; shortness of breath; trouble walking; unusual bruising or bleeding; unusual tiredness or weakness; unusually pale skin; yellowing of the eyes; yellowing of the skin along with dark urine, pale stools, or persistent loss of appetite.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects.