A 30-yeаr-оld mаn presents tо the clinic cоmplаining that he ejaculates within one minute of penetration, causing significant distress in his relationship. He has normal erectile functions and no endocrine abnormalities. The clinician prescribes a pharmacological agent commonly used off label to delay ejaculation by enhancing serotonergic neurotransmission. Which of the following drugs is most strongly associated with delaying ejaculation due to potent inhibition of serotonin reuptake?