I noticed this is your first post here and it is an interesting one.
Your experience with Prescription Anti Parasitic Drugs being ineffective has been reported by many others with Morgellons. I have never taken any of that type of drug due to others reporting them as lacking Efficacy in Morgellons and their side effect profiles.
I have wondered about how well nicotine would work but had no personal experience with it, so I have not written any about its possible use. Your personal use and reported results may well give the Morgellons community another weapon in the fight against this difficult adversary. Thank you.
Growing your own organic tobacco plants would be one way around this issue. Tobacco plants are easy to grow and there are several ornamental varieties that have plenty of nicotine.