@germanshepherdAnti-parasite treatments - per your RFI a couple months back.
The literal hillbillies I worked with 35 years ago claimed a person who chewed Copenhagen would never get worms, so there's probably something to this.
They would probably have to swallow the chew for it to work. Maybe they did.
I chewed Cope for over 25 years. After awhile you get kind of immune to it, and you don't salivate much. When you do, you usually just swallow it - no biggie. Coincidentally, I never had worms.
I have never chewed or smoked and I too have never had worms... So. You do you?