“Our results that cocaine and tetrodotoxin attenuated phorbol ester stimulation of GnRH , presumably through inhibition of Na+ influx, suggest a direct biochemical mechanism for cocaine disruption of hypothalamic GnRH secretion and, consequently, cyclic reproductive function.”
“PDBu-stimulated GnRH release was blocked by both tetrodotoxin and cocaine , known inhibitors of Na+ influx.”