What side effects may I notice from receiving Cystagon?

Side effects that you should report to your care team as soon as possible:
-Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
-Dizziness, loss of balance or coordination, confusion or trouble speaking
-Increased pressure around the brain—severe headache, blurry vision, change in vision, nausea, vomiting
-Joints that stretch farther than usual, soft, stretchy skin, unusual bruising
-Redness, blistering, peeling, or loosening of the skin, including inside the mouth
-Seizures
-Stomach bleeding—bloody or black, tar-like stools, vomiting blood or brown material that looks like coffee grounds
-Sudden or severe stomach pain, bloody diarrhea, fever, nausea, vomiting
-Worsening mood, feelings of depression
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
-Bad breath
-Diarrhea
-Loss of appetite
-Nausea
-Stomach pain
-Unusual weakness or fatigue
-Vomiting

This list may not describe all possible side effects for Cystagon. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.