Cannabis has anti-inflammatory properties that can help with inflammation related to pulmonary fibrosis: https://www.marijuanadoctors.com/content/ailments/view/168/pulmonary-fibrosis
A tincture with a 1:1 ratio of THC to CBD would maximize the inflammatory relief you will get from the tincture. If you are looking to avoid feeling "high," then an 18:1 or higher tincture will suit you better.
"CANNABIS SCIENCE DEVELOPS INHALATION MEDICATION FOR THOSE SUFFERING ASTHMA/COPD VIA NEBULIZER, TARGETS NATIONAL MARKETS"
"Studies have shown CBD/THC to be effective as a bronchial dilator and in many cases being better that Albuterol or Ipratropium."