Dear Rabbi Simon,
As I told you, I am quite a heavy tobacco user. During Yom Kippur I do not smoke, which I realize is forbidden. Can I use the Tobacco patches I told you about, if I put them on before the fast begins?
Yes you may use the patch as described, applying it before YK, not on the day itself. I hope that you are successful in managing and ultimately vanquishing your tobacco usage.
Best wishes and hatimah tovah in the book of life.
Rabbi Rashi Simon