Lmao nice try author. There is no cure for pneumoconiosis. The people suffering from symptoms would need to be on medication for the rest of their life, there is no medication that is a one-and-done cure-all. Even if she figured out the formula of medication in her past life, there is NO med in present-day that "cures" this condition. Usually people with this condition get put on bronchodilators or corticosteroids (like for asthma patients).
Would've been more "realistic" if she just used magic to make up something to target and destroy the compounds stuck in their lungs. Not this "i used meds from my past life" bs.