Oxytocinergic

Oxytocin is a nine-amino-acid hormone made in the hypothalamus. It contracts the uterus in labour and releases milk, and in the brain it acts on social, sexual and stress behaviour through a single receptor. Injected oxytocin is a standard drug for preventing bleeding after birth. As a nasal spray it raised oxytocin in the cerebrospinal fluid, but the large trials of intranasal oxytocin in autism and obesity were negative, a famous finding that it increases trust failed to replicate, and it did no better than placebo for women's sexual function.