Standard textbooks, databases, and safety sheets consistently state that the lethal dose of nicotine for adults is 60 mg or less (30–60 mg), but there is overwhelming data indicating that more than 500 mg of oral nicotine is required to kill an adult.

There can be anywhere from 8 milligrams to 20 milligrams of nicotine found in a single cigarette, with the average amount being 12 milligrams.

也就是说，你要从2包烟提炼出里面100%的nicotine才有480mg。保守起见你可能要起码4包烟才能提炼出一个成人的致死分量。然后考虑到这个奶茶人家可能只喝一口就扔了，那你起码1条10包烟提炼出来的nicotine全扔进去，才比较可能杀死一个人。