My Psycaterist put me on Lustral 50 from 2 weeks then raise it to 75 for Anxiety and Depression. Can this cause serotonin syndrome?

Sertraline. This is not a particularly high dose of lustral. Although Serotonin Syndrome has been reported at even low SSRI doses, this dose does not pose a significant threat. Being on some medication mixtures may ^ risk of serotonin syndrome.