Translation of "Nicotine" in Japanese

Is nicotine as addictive as heroin?

ニコチンはヘロインと同様に中毒性があるのですか？

He said that his previous dentist told him that he'd remove nicotine stains if he stopped smoking.

前の歯医者さんに、たばこをやめるなら、ヤニ取りしてあげる・・・といわれたそうです。