Subgroup analysesSubgroup analyses by dose of BHT suggested that higher doses of BHT may be associated with more effectiveness but also higher risk of adverse effects .
There was low to moderate quality evidence that BHT in various forms and doses is more effective than placebo for treating moderate to severe menopausal hot flushes .
There was some evidence to suggest that higher doses of BHT are associated with greater effectiveness but also with higher risk of adverse effects .
No data are yet available about the safety of BHT with regard to long-term outcomes such as heart attack , stroke and breast cancer .
BACKGROUND Various hormone therapies ( HT ) are available to treat  menopausal vasomotor symptoms .
Bioidentical hormones are chemically identical to those produced by the human body , and several types are well-tested and available on prescription .
Many women have opted for bioidentical hormone therapy ( BHT ) on the assumption that it is safer than other forms of HT .
We evaluated the evidence .
OBJECTIVES To determine the effectiveness and safety of bioidentical hormones compared to placebo or non-bioidentical hormones for the relief of vasomotor symptoms .
Transdermal estradiol gel 0.1% for the treatment of vasomotor symptoms in postmenopausal women
Objective : The objective of this study was to evaluate the efficacy and safety of three doses of estradiol gel 0.1 % ( Divigel , a novel formulation consisting of 1 mg estradiol per 1 g transdermal gel ) to reduce the frequency and severity of vasomotor symptoms and signs of vulvar and vaginal atrophy associated with menopause . Design : A total of 488 postmenopausal women were evaluated in a 12-week study comparing placebo with estradiol gel 0.1 % at doses of 1.0 , 0.5 , and 0.25 mg/day , with estimated daily deliveries of 0.027 , 0.009 , and 0.003 mg of estradiol , respectively . Primary endpoints were the change from baseline in daily frequency and severity of moderate to severe vasomotor symptoms . Change from baseline in the signs of vulvar and vaginal atrophy ( vaginal pH and percentage of superficial cells ) was also assessed . Results : Treatment with estradiol gel 0.1 % showed statistically significant reductions in frequency and severity of vasomotor symptoms from baseline compared with placebo as early as Week 2 that were maintained throughout treatment . Signs of vulvar and vaginal atrophy were also significantly improved from baseline with all three doses of estradiol gel 0.1 % compared with placebo . Conclusions : Low-dose transdermal estradiol gel 0.1 % is an effective treatment for relief of vasomotor symptoms , as well as signs of vulvar and vaginal atrophy , associated with menopause . Estradiol gel 0.1 % offers multiple dosing options to individualize patient therapy , including the lowest available effective dose ( 0.25 mg estradiol , delivering 0.003 mg/d estradiol ) to treat the vasomotor symptoms of menopause
Subgroup analysesSubgroup analyses by dose of BHT suggested that higher doses of BHT may be associated with more effectiveness but also higher risk of adverse effects .
There was low to moderate quality evidence that BHT in various forms and doses is more effective than placebo for treating moderate to severe menopausal hot flushes .
There was some evidence to suggest that higher doses of BHT are associated with greater effectiveness but also with higher risk of adverse effects .
No data are yet available about the safety of BHT with regard to long-term outcomes such as heart attack , stroke and breast cancer .
BACKGROUND Various hormone therapies ( HT ) are available to treat  menopausal vasomotor symptoms .
Bioidentical hormones are chemically identical to those produced by the human body , and several types are well-tested and available on prescription .
Many women have opted for bioidentical hormone therapy ( BHT ) on the assumption that it is safer than other forms of HT .
We evaluated the evidence .
OBJECTIVES To determine the effectiveness and safety of bioidentical hormones compared to placebo or non-bioidentical hormones for the relief of vasomotor symptoms .