“Our findings indicate that, in clinical practice, SJW could reduce the dose of morphine obtaining the same analgesic effect.”
“Phosphorylation of the γ subunit of PKC enzyme was assayed by western blotting in the periaqueductal grey … (PAG) from rodents co-administered with morphine and hypericin and was prevented in rodent PAG by SJW or hypericin co-administration with morphine , inducing a potentiation of morphine analgesia in thermal pain.”
“The score of pain assessment in healthy volunteers were decreased by 40% when morphine was co-administered with SJW at a dose largely below those used to obtain an antidepressant or analgesic effect in both rodents and humans.”