Estradiol/medroxyprogesterone acetate

Estradiol/medroxyprogesterone acetate (E2/MPA), sold under the brand names Indivina and Tridestra among others, is a combination product of estradiol, an estrogen, and medroxyprogesterone acetate, a progestogen, which is used in menopausal hormone therapy for the treatment of menopausal symptoms. It is taken by mouth.

Estradiol /
medroxyprogesterone acetate

Estradiol (top) and medroxy- progesterone acetate (bottom)
Combination of
Estradiol	Estrogen
Medroxyprogesterone acetate	Progestogen
Clinical data
Trade names	Indivina, Tridestra
Other names	E2/MPA
Routes of administration	By mouth
Drug class	Estrogen; Progestogen
Legal status
Legal status	US: ℞-only
Identifiers
CAS Number	215930-42-0
PubChem CID	66978539

Results of the Women's Health Initiative (WHI) menopausal hormone therapy randomized controlled trials

Clinical outcome	Hypothesized effect on risk	Estrogen and progestogen (CEsTooltip conjugated estrogens 0.625 mg/day p.o. + MPATooltip medroxyprogesterone acetate 2.5 mg/day p.o.) (n = 16,608, with uterus, 5.2–5.6 years follow up)			Estrogen alone (CEsTooltip Conjugated estrogens 0.625 mg/day p.o.) (n = 10,739, no uterus, 6.8–7.1 years follow up)
		HRTooltip Hazard ratio	95% CITooltip Confidence interval	ARTooltip Attributable risk	HRTooltip Hazard ratio	95% CITooltip Confidence interval	ARTooltip Attributable risk
Coronary heart disease	Decreased	1.24	1.00–1.54	+6 / 10,000 PYs	0.95	0.79–1.15	−3 / 10,000 PYs
Stroke	Decreased	1.31	1.02–1.68	+8 / 10,000 PYs	1.37	1.09–1.73	+12 / 10,000 PYs
Pulmonary embolism	Increased	2.13	1.45–3.11	+10 / 10,000 PYs	1.37	0.90–2.07	+4 / 10,000 PYs
Venous thromboembolism	Increased	2.06	1.57–2.70	+18 / 10,000 PYs	1.32	0.99–1.75	+8 / 10,000 PYs
Breast cancer	Increased	1.24	1.02–1.50	+8 / 10,000 PYs	0.80	0.62–1.04	−6 / 10,000 PYs
Colorectal cancer	Decreased	0.56	0.38–0.81	−7 / 10,000 PYs	1.08	0.75–1.55	+1 / 10,000 PYs
Endometrial cancer	–	0.81	0.48–1.36	−1 / 10,000 PYs	–	–	–
Hip fractures	Decreased	0.67	0.47–0.96	−5 / 10,000 PYs	0.65	0.45–0.94	−7 / 10,000 PYs
Total fractures	Decreased	0.76	0.69–0.83	−47 / 10,000 PYs	0.71	0.64–0.80	−53 / 10,000 PYs
Total mortality	Decreased	0.98	0.82–1.18	−1 / 10,000 PYs	1.04	0.91–1.12	+3 / 10,000 PYs
Global index	–	1.15	1.03–1.28	+19 / 10,000 PYs	1.01	1.09–1.12	+2 / 10,000 PYs
Diabetes	–	0.79	0.67–0.93		0.88	0.77–1.01
Gallbladder disease	Increased	1.59	1.28–1.97		1.67	1.35–2.06
Stress incontinence	–	1.87	1.61–2.18		2.15	1.77–2.82
Urge incontinence	–	1.15	0.99–1.34		1.32	1.10–1.58
Peripheral artery disease	–	0.89	0.63–1.25		1.32	0.99–1.77
Probable dementia	Decreased	2.05	1.21–3.48		1.49	0.83–2.66
Abbreviations: CEs = conjugated estrogens. MPA = medroxyprogesterone acetate. p.o. = per oral. HR = hazard ratio. AR = attributable risk. PYs = person–years. CI = confidence interval. Notes: Sample sizes (n) include placebo recipients, which were about half of patients. "Global index" is defined for each woman as the time to earliest diagnosis for coronary heart disease, stroke, pulmonary embolism, breast cancer, colorectal cancer, endometrial cancer (estrogen plus progestogen group only), hip fractures, and death from other causes. Sources: See template.

See also

• Conjugated estrogens/medroxyprogesterone acetate
• Estradiol cypionate/medroxyprogesterone acetate
• List of combined sex-hormonal preparations