What side effects may I notice from receiving Kalydeco?

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
-changes in vision
-dark urine
-general ill feeling of flu-like symptoms
-light-colored stools
-loss of appetite
-right upper belly pain
-unusually weak or tired
-yellowing of the 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):

-diarrhea
-dizziness
-headache
-joint pain
-nausea

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