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"
https://www.cannabisscience.com/index.php/news-media/cbis-latest-news/785-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."