European College of Neuropsychopharmacology Oct 13 2025 Researchers have discovered that the ability to have an erection or to orgasm is related to the levels of serotonin in the brain, but this relation only applies to depressed patients taking SSRI antidepressants. At the moment, there is no test for who might experience sexual problems during treatment for depression, but this discovery may help depressed patients to choose antidepressants which allow them to maintain or regain an active sex