Pirfenidone Side Effects
What should I watch for?
Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse.
If you smoke, tell your doctor if you notice this medicine is not working well for you. Talk to your doctor if you are a smoker or if you decide to stop smoking.
This medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.
Side Effects to watch for
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
- signs and symptoms of liver injury like dark yellow or brown urine; general ill feeling or flu-like symptoms; light colored stools; loss of appetite; nausea; 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):
What may interact with this drug?
This medicine may interact with the following medications:
- certain antiinfectives like ciprofloxacin, thiabendazole
- certain medicines for asthma like zafirlukast, zileuton, montelukast
- certain medicines for depression, anxiety, or psychotic disturbances
- certain medicines for irregular heart beat like amiodarone, mexiletine
- certain medicines for seizures like carbamazepine, phenytoin, fosphenytoin
- stomach acid blockers like cimetidine