The two peptides most often credited with raising sexual arousal, PT-141 and oxytocin, a neuropeptide also known as “the love hormone,” are both FDA-approved for certain uses. He likes to take PT-141 and oxytocin before Hinge dates; the compounds make him feel extra switched-on and alert. In June, biohacker Bryan Johnson’s Immortals platform began shipping it as the Arousal Peptide (opens in new tab) . Swan Medical in Los Gatos sells a three-in-one “Thrill Pill” containing PT-141, oxytocin, and Cialis. She’s perplexed by the peptide’s transformation from a supplement for perimenopausal women to a party favor for sexually healthy men.