Pirfenidone
About Pirfenidone
Pirfenidone is a prescription medication used to treat a specific, progressive lung condition known as idiopathic pulmonary fibrosis (IPF). This condition causes the deep tissues of your lungs to become thick, stiff, and scarred over time, making it increasingly difficult to breathe. By targeting this scarring process, Pirfenidone helps to preserve your remaining lung function and manage how quickly the disease progresses.
For Pirfenidone to work effectively, you must take it consistently every day exactly as your doctor prescribes. It is highly recommended to take this medication with food, as this simple step significantly reduces stomach-related side effects like nausea or indigestion. Making specific lifestyle adjustments, such as protecting your skin from the sun and staying well-hydrated, can also greatly improve your comfort during treatment.
While taking Pirfenidone, you may experience some mild, common side effects such as nausea, skin rashes, fatigue, or a decreased appetite. However, it is vital to consult your doctor immediately if you experience signs of liver damage, which is a serious but recognised risk. These signs include yellowing of your skin or eyes, unusually dark urine, pale stools, or severe pain in your upper abdomen.
Before you begin taking Pirfenidone, you must discuss your complete medical history with your doctor, especially if you have a history of liver or kidney problems. Do not take this medication if you have severe liver disease or end-stage kidney disease, as your body will not be able to process and eliminate the medicine safely.
You must avoid smoking while taking Pirfenidone because tobacco smoke causes your body to break down the medicine much faster, making it far less effective. Additionally, let your healthcare provider know if you are taking other medications or if you are pregnant, breastfeeding, or an older adult, so they can ensure this treatment is safe for your specific situation.
Uses of Pirfenidone
Medicinal Benefits
Pirfenidone helps slow the progression of idiopathic pulmonary fibrosis (IPF) and supports the preservation of lung function. Pirfenidone does not cure IPF or reverse lung scarring that has already occurred. The response to treatment varies between individuals, and regular monitoring is needed to assess how well the treatment is working. Its main benefits include:
- Slows the progression of lung scarring: Helps reduce the processes involved in fibrosis (the formation of scar tissue), slowing further scarring in the lungs.
- Helps preserve lung function: Slows the decline in how well the lungs work, which may help maintain breathing capacity for longer.
- Supports long-term management of IPF: Regular treatment may help slow disease progression when taken consistently as prescribed.
- May reduce the risk of sudden worsening: Treatment may help lower the risk of acute exacerbations (sudden episodes of worsening symptoms) in some people with IPF.
Directions for Use
- Pirfenidone should be taken with food, or as advised by the doctor.
- It is usually taken three times a day or as directed by the doctor.
- Swallow Pirfenidone as a whole with a glass of water.
- Do not chew, crush, or break it.
Storage
Side Effects of Pirfenidone
Common Side Effects (Usually mild):
- Nausea, vomiting, or acid reflux
- Stomach ache, indigestion, or abdominal discomfort
- Loss of appetite and gradual weight loss
- Increased sensitivity to sunlight, resulting in a sunburn-like rash
- Feeling unusually tired, weak, or dizzy
- Mild diarrhoea
Serious Side Effects (Consult your doctor right away):
- Signs of liver damage, such as yellowing of your skin or eyes (jaundice), dark-coloured urine, pale stools, or severe pain in the upper right side of your stomach
- Severe skin reactions, including painful redness, blistering, peeling, or swelling after being in the sun
- Signs of a severe allergic reaction, such as swelling of your face, lips, tongue, or throat, severe dizziness, or difficulty breathing
Medicines Containing this Salt
View AllDrug Warnings
- Keep all blood test appointments: Your doctor will order regular blood tests to check your liver function before you start Pirfenidone, and monthly for the first several months to monitor for potential liver damage.
- Always take with food: Never take this medication on an empty stomach, as food is crucial for preventing severe nausea and stomach pain.
- Monitor your skin daily: Check your skin regularly for any new rashes, redness, or blisters, especially after you have been outdoors.
- Inform all healthcare providers: Always tell any doctor, dentist, or pharmacist you visit that you are taking Pirfenidone before you begin any new prescription, over-the-counter medicine, or herbal supplement.
Drug Interactions
The following medicines may interact with Pirfenidone and require closer monitoring or dose adjustments:
- Fluvoxamine and other CYP1A2 inhibitors: Taking these medications with Pirfenidone can significantly increase the levels of the medicine in your body, greatly raising your risk of severe side effects.
- Ciprofloxacin: This common antibiotic can raise the levels of Pirfenidone in your blood; your doctor may need to adjust your dose if you must take them together.
Rifampin and other CYP1A2 inducers: These drugs can drastically lower the amount of Pirfenidone in your system, making your treatment much less effective.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
cautionIt is not known if alcohol interacts with Pirfenidone. However, avoid consumption of alcohol while taking Pirfenidone as it may cause increased dizziness.
Pregnancy
cautionPlease consult your doctor if you have any concerns regarding this; your doctor will prescribe only if the benefits outweigh the risks.
Breast Feeding
cautionConsult your doctor if you are breastfeeding; your doctor will decide whether Pirfenidone can be taken by breastfeeding mothers or not.
Driving
cautionPirfenidone might cause dizziness and tiredness. Drive or operate machinery only if you are alert.
Liver
cautionDose adjustment may be needed. Please consult your doctor if you have a liver impairment or any concerns regarding this. Pirfenidone is not recommended for patients with severe hepatic impairment.
Kidney
cautionDose adjustment may be needed. Please consult your doctor if you have kidney impairment or any concerns. Pirfenidone is not recommended for patients with an end-stage renal disease requiring dialysis.
Children
unsafePirfenidone is not recommended for children below 18years as the safety and effectiveness has not been established.
Habit Forming
Diet & Lifestyle Advise
- Quit all smoking and tobacco use: Tobacco smoke drastically reduces the amount of Pirfenidone in your body, making the drug much less effective. Speak to your doctor if you need resources to help you quit.
- Practise strict sun protection: This medication increases your skin's sensitivity to ultraviolet (UV) light. Always apply a broad-spectrum sunscreen with an SPF of 50 or higher, wear tightly woven long-sleeved clothing, wide-brimmed hats, and sunglasses when outdoors, and avoid tanning beds entirely.
- Eat smaller, frequent meals: If you experience nausea or a loss of appetite, eating five or six small meals throughout the day rather than three large ones can keep your stomach settled.
- Stay hydrated: Drink plenty of water throughout the day, especially if you experience mild diarrhoea, to keep your body properly hydrated.
Special Advise
Your doctor may advise liver function tests prior to the start of the treatment.
Regular blood tests are advised at the start of treatment with Pirfenidone and monthly for every 6 months, and then for every 3 months thereafter to check the liver functioning.
Patients Concern
Disease/Condition Glossary
Idiopathic pulmonary fibrosis (IPF): Idiopathic pulmonary fibrosis belongs to a group of interstitial lung diseases. It is an irreversible chronic disease marked by a progressive decline in lung function. The tissues in the lungs become inflamed and scarred over time, which makes it difficult to breathe properly. The scar tissue, known as fibrosis, becomes thick /stiff over time, making it hard for the lungs to work efficiently. This causes decreased lung function, which leads to increased breathlessness and coughing. Breathing difficulties can lead to other medical problems. Symptoms of IPF are shortness of breath, persistent dry cough, loss of appetite, weight loss, and rounded and widened tips of the fingers and toes.
FAQs
No. Do not stop taking Pirfenidone without consulting your doctor, even if your breathing improves or your disease appears stable. Pirfenidone is a long-term treatment that helps slow the progression of idiopathic pulmonary fibrosis (IPF) but does not cure it or reverse existing lung scarring. Stopping treatment may allow the disease to progress more quickly. Continue taking the medicine exactly as prescribed and speak with your doctor before making any changes.
You should always take Pirfenidone with food or a meal. Taking it with food slows its absorption and helps reduce common side effects such as nausea, stomach pain, dizziness, and stomach discomfort. Swallow the tablet or capsule whole with a glass of water unless your doctor advises otherwise. If you have difficulty eating because of nausea, talk to your doctor or pharmacist.
It is highly recommended to avoid or limit alcohol while taking Pirfenidone. Both alcohol and this medication are processed by your liver, and combining them can significantly increase your risk of liver damage. Talk to your doctor about your alcohol consumption habits.
If you develop a sun-related skin rash, redness, or blistering, stay out of the sun immediately and contact your doctor. They may need to adjust your dose or temporarily pause your treatment to allow your skin to heal. Talk to your doctor before going back into the sun.
No, Pirfenidone does not cure idiopathic pulmonary fibrosis and cannot reverse any lung scarring that has already occurred. Its clinical purpose is to slow down the rate of new scar tissue formation, helping you preserve your remaining lung function. Talk to your doctor to understand your long-term treatment goals.
If you stop taking Pirfenidone for 14 days or longer, you must not restart at your full previous dose. Your body will need to go through the process of a gradually increasing dose again to prevent severe side effects. Talk to your doctor or pharmacist immediately for instructions on how to safely resume.
The safety of Pirfenidone during pregnancy and breastfeeding has not been fully established. If you are pregnant, planning to become pregnant, or breastfeeding, you must discuss the potential risks and benefits with your healthcare provider. Talk to your doctor to discuss safe alternative options.
