How many cigarettes does it take for you to get addicted?

It is variable: There was an old number that was thrown around when I was in training, that if an individual smoked at least seven cigarettes, they had a >90% chance of becoming tobacco dependent. There are people who smoke "socially" and don't progress, but the vast majority will increase smoking to the average 30 cigarettes per day, and ultimately suffer the harms that smoking causes.