What side effects may I notice from receiving Cystagon?

Side effects that you should report to your doctor or health care professional as soon as possible:
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-bone pain or fractures
-breathing problems
-changes in vision
-confusion, depression, other mood changes
-dark urine
-eye pain
-feeling faint or lightheaded, falls
-fever or chills, sore throat
-general ill feeling or flu-like symptoms
-nausea, vomiting
-purple skin lesions
-ringing in the ears
-seizures
-trouble passing urine or change in the amount of urine
-unusually bleeding or bruising
-unusually weak or tired
-yellowing of eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-constipation or diarrhea
-drowsiness
-headache
-loss of appetite
-stomach upset
-unpleasant breath

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.