Pirfenidone

​Common side effects include:

• Nausea, vomiting, diarrhea, indigestion, heartburn and abdominal pain
• Take the medication after a meal to reduce gastric discomfort and nausea
• Drink more water when having diarrhoea
  
• These gastrointestinal side effects usually occur within the first 3 months of treatment and reduce over time
• Giddiness, tiredness, headache
• Take the medication after a meal to reduce giddiness
• Do not drive or operate machinery if you feel giddy or tired

• Weight loss
• The doctor will monitor your weight while you are taking this medicine
• Skin sensitivity to sun, rash, itch
• This usually occurs in the first 6 months of treatment
• Avoid prolonged exposure of skin to direct sunlight or sunlamps
• When outside, use sunscreen (at least SPF 50) and wear protective clothing that cover your skin to avoid sunburns
• Upper respiratory tract infection
• Changes in taste
• Joint pain
• Insomnia
  

Most of these side effects will get better or go away as your body gets used to the medication.
Inform your doctor if the side effects above become severe and bothersome.

Rare but serious side effects include:

• Liver problem: Signs include dark urine or light coloured stools, nausea, vomiting, loss of appetite, stomach pain, yellowing of your eyes or skin
• Stevens-Johnson syndrome or toxic epidermal necrolysis (severe skin reaction which may be life-threatening): Signs include red, flat or circular patches on the body, central blisters, skin peeling, ulcers of mouth, throat, nose, genitals and eyes, fever and flu-like symptoms
  

The symptoms of a drug allergy include one or more of the following:

• Swollen face/eyes/lips/tongue
  
• Difficulty in breathing
• Itchy skin rashes over your whole body
  

Inform your healthcare professional if:

• You are allergic to this medication or any of the other ingredients of this medication
• You are pregnant, planning to become pregnant, or breastfeeding (remove if not needed)
• You are taking any other medications, including supplements, traditional medications and herbal remedies.
• You have liver disease and/or end stage kidney disease requiring dialysis
• You are a smoker, and currently smoking

​Consult your healthcare professional if you are currently taking any other medications e.g. antidepressants or antibiotics, as it may increase levels of Pirfenidone in your body and lead to more side effects.