“Both, progesterone (0.5 mg/rat) and estradiol benzoate (4.0 micrograms/rat) were able to decrease the cumulative burying behavior when injected with a subthreshold dose of DMI (1.25 mg/kg).”
“In addition, the effect of DMI (1.25 mg/kg) plus the combination of estradiol benzoate and progesterone , sequentially administered (48 h and 4 h before the tests, respectively), also produced a synergistic decrease in burying behavior.”
“It is concluded that DMI synergizes its anxiolytic-like effect when administered with estradiol alone or in combination with progesterone.”