I also think (I am not a doctor) alcohol in moderation is fine if your liver is healthy to begin with but it may affect how your pills are metabolized resulting in lower or higher levels of the said substance.
Bio-identical estrogen taken orally (and non-orally) has not been shown to be harmful to the liver. This was an issue with high doses of oral non bio-identical estrogen. Things have changed in the last 10 years or so.
World J Gastroenterol. 2007 Aug 28;13(32):4295-305.
"These lines of evidence suggest that the greater progression of hepatic fibrosis and HCC in men and postmenopausal women may be due, at least in part, to lower production of estradiol and a reduced response to the action of estradiol."
Exp Clin Endocrinol Diabetes. 2005 Dec;113(10):586-92.
"Sixty male-to-female transsexuals were treated with monthly injections of gonadotropin-releasing hormone agonist (GnRHa) and oral oestradiol-17beta valerate for 2 years to achieve feminisation until SRS."
"Liver enzymes, lipids, and prolactin levels were unchanged."
Maturitas. 1980 Jul;2(2):95-100.
"The material consisted of 32 patients, 12 of whom were selected for control. All were cases approaching the menopause and had been subject to oophorectomia bilateralis and hysterectomia for myomas. All 20 investigation patients received estradiol valerianate orally(...) of 6 mth. During the course the serum estradiol level increased 5--6-fold from the postmenopausal levels."
"In the liver enzymes no changes occurred."