I've had some success with virgin coconut oil wiped on/in my butt! But, it needs to be reapplied fairly often, because of it's consistency. It cut the activity down to almost nil!
I've even moved on to using only "Athletes Foot Powder Spray", or "Jock Itch Spray Powder" (similar) in my briefs, the one with (Miconazole nitrate).
This is even better! It cuts out all activity in a short while! But, when treating strongly with Meds, or Sups. I will get an occasional short burst of pinworms going bananas!,,,lol, but that goes away by itself quickly afterwards.
Give it a try, nothing ventured, nothing gained!
I have bigger, badder fish, to fry right now! I wish I could find some way to eliminate them, or hit them as hard as this! But, it seems they keep getting stronger, & laughing at me! :(