μ-Opioid receptor gene A118G polymorphism predicts pain recovery after sexual assault.

Unlabelled: Pain is common after sexual assault (SA), but etiology of pain symptoms after SA is unknown. Preclinical studies suggest that the release of endogenous opioids during stress produces delayed-onset hyperalgesia. In human studies, individuals with ≥1 G allele at the μ-opioid receptor functional single nucleotide polymorphism A118G have been shown to have a reduced response to opioids.