How does Relizen work? Bonafide Health November 15, 2019 15:17 Updated Follow Results from an in vitro study indicate that Relizen works through a serotonergic mechanism of action. Related articles Who can or should use Relizen? What are the ingredients in Relizen? Does Relizen work for night sweats? How long does Relizen take to work? How soon after sex can I use Revaree? Comments 0 comments Article is closed for comments.