Hi JJH: Glad the article resonated with you. Since I have been taking NAC and guaifenesin have noticed a significant reduction in my cough and the thinning of mucus which helps tremendously to get it up and out of my lungs.
As for glutathione, I have no experience or knowledge about intravenous administration. However, I have ordered glutathione that is designed to be added to saline and nebulized. Here is the link: https://shop.thedrswolfson.com/products/l-glutathione-plus

I have not done it yet but there is a research study going on now that is testing a combination of vitamin c and glutathione that is added to saline and nebulized. I will be trying out my product in the near future and post on how I am doing. When you check out the product link, scroll down and check out the "How to prepare" section. It is very informative. Wishing you the best of luck and health!