Darcy Baston of Paxilprogress said "I believe that Paxil is not habit forming"

Hereʼs why: for a drug to be labelled habit forming, you have
to demonstrate a drug seeking behavior often at the expense
of rationality, safety, and economic feasibility. This means
you have to be highly desiring of the drug for the sake of
having the drug. This isnʼt quite the case with Paxil.

see

http://www.paxilprogress.org/pdf/Paxil-Withdrawal-Guide-2005.pdf