Medication
Pfeiffer
PFEIFFER
Oxytocin nasal spray consisted of 8IU each spray per nostril morning and night; 32IU per day). The placebo spray included all of the same ingredients except oxytocin. All sprays contained sorbitol (2%), glycerol (2%), benzyl alcohol as preservative, and distilled water, within an amber 8 ml glass nasal spray with metered Pfeiffer pump spray bottle. Drug kits were manufactured by PCI Pharma Services. We followed guidelines outlined by both Guastella et al., 2013 [