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Slowing the Scar: Antifibrotics and Living with ILD

Treatment in ILD splits into two strategies — calm the inflammation, or slow the fibrosis — plus the supportive care that protects quality of life. Here is what antifibrotic therapy realistically does, and what surrounds it.

Two strategies, chosen by cause

Once the diagnosis is settled, treatment follows the biology you learned in the last guide. If the disease is driven mostly by inflammation — sarcoidosis, hypersensitivity pneumonitis in its active phase, many connective-tissue-disease ILDs — then calming the immune system with steroids or other immunosuppressants can genuinely improve the lung. If the disease is driven mostly by fibrosis — above all IPF — then immunosuppression does not help and the goal shifts to slowing the scar with antifibrotic therapy.

What antifibrotics actually do

It is important to be honest here. Antifibrotic drugs (the two best known are pirfenidone and nintedanib) do not reverse scarring and they are not a cure. What they do is slow the rate at which the lung loses function — measured as a gentler decline in FVC over the years. For someone with IPF or another progressively fibrosing ILD, slowing the slope can mean more good months and a flatter curve, which is a real and worthwhile goal even though it is not a victory over the disease.

Antifibrotic therapy - what to expect (illustrative)

  Without drug:  FVC declining about  -200 mL / year
  With drug:     FVC declining about  -100 mL / year

  Interpretation:
    * The line still slopes DOWN - no reversal.
    * The slope is roughly HALVED - slower loss.
    * Benefit is measured over years, not days.
    * Side effects (nausea, diarrhoea, rash, liver tests)
      are managed by dose adjustment, not by stopping at
      the first sign.
Antifibrotics flatten the decline curve; they do not turn it upward.

Everything around the medicine

  1. [[pulm-pulmonary-rehabilitation|Pulmonary rehabilitation]] — supervised exercise and education that builds stamina and confidence. It will not unscar the lung, but it reliably improves how far and how well a person can move within the lung they have.
  2. [[long-term-oxygen-therapy|Long-term oxygen therapy]] — when resting oxygen falls low enough, supplemental oxygen eases breathlessness on exertion and supports the heart and brain. Many people start with oxygen used only during activity.
  3. Watch for complications — advanced fibrosis can drive pulmonary hypertension (high pressure in the lung's blood vessels), and any sudden worsening over days needs urgent assessment, since an acute exacerbation or infection can be serious.
  4. Prevention still counts — stopping smoking, staying up to date on vaccines, and removing any ongoing exposure (mould, dust, birds) protect the lung you have left.

For carefully selected younger patients with advanced, progressive disease, lung transplantation can be life-changing and remains the only treatment that truly replaces destroyed lung. At the other end, palliative care — focused on relieving breathlessness, cough, and anxiety — is not a last resort but a partner that can run alongside active treatment from early on. Good ILD care holds both hopes at once: slowing the disease, and living as fully as possible with it.