5 days tops, maybe even less is enough to bring your tolerance down.....I know this by experience

In the summer I went on vacation for about 5 days and before that I smoked about everyday for over a year, but while I was on vacation I didn't smoke at all, and then when I came back on the 5th day I smoked half of a .5 gram blunt of some decent stuff and got one of the highest ive ever been in my life...waaaaaaaaaaay higher than usual