How long does saratonin withdrawal last?

Slow taper!!!!! It could be a couple of days to over a week, depends on the medication that you are taking and the dose. The best way to avoid this is by properly coming off the medication on a slow taper.
Serotonin. This depends on current dose, how long u have been on it, and how rapidly u stop. Average is 7 to 14 days.
Maybe week or two. If you stopped cold turkey, then you could have no withdrawal (for the lucky ones) or it could last anywhere from a few days to a week or two.