i know that it secretes nicotine into your body but how does it work? like how does the nicotine penentrate into the body? like is it a chemical property that nicotine has? or can this work with any substance?

and if you can secrete nicotine into your body this way can you secrete more complex compounds intoyour body through this method?

No i am not a drug addict nor do i smoke or anything like that just curious.