IE83631B1 - Hormone preparation and method - Google Patents

Description

HORMONE PREPARATION AND METHOD This invention is concerned with a hormone replacement formulation which employs a combination of estrogen and progestin and wherein a short period of relatively dominant estrogenic activity alternates which a short period of relatively dominant progestagenic activity for hormonal replacement therapy for menopausal or castrate women.

In the luteal phase of the menstrual cycle. serum progesterone levels increase and progesterone mediated secretory changes occur in the uterine endometrium. The presence of progesterone receptors has been shown to be a necessary prerequisite for progesterone action in the endometrium (see Walters. M.R. and Clark. J. H. Relationship between the quantity of progesterone receptors and the antagonism of estrogen—induced uterotropic response Endocrinology 105238} 1979) and it is well documented that estrogen priming in the follicular phase of the cycle is responsible for the development of both estrogen and progesterone receptors (see Bayard, F., Damilano, S., Robel, P. and Baulien, E.E.

Cytoplasmic and nuclear estradiol and progesterone receptors in human endometrium. J.

Clin Endocrinol Metab. 46:635. 1978). On the other hand, progesterone exerts a negative feedback effect on its own receptor (see Tseng, L. and Gurpide, E. Effects of progestins on estradiol receptor levels in human endometrium, J. Clin Endocrinol Metab. 412402, 1975) and also acts to downregulate endometrial estrogen receptors possibly by induction of an estrogen receptor regulatory factor (see Leavitt, W.W., Okulicz, W.C.. McCracken, J.A.. Schramm, WS. and Robidoux. W.F. Jr. Rapid recovery of nuclear estrogen receptor and oxytocin receptor in the ovinc uterus following progesterone withdrawal. J. Steroid Bioehem. 221686, 1985).

These physiologic changes can be reproduced pharmacologically as shown by the induction of estrogen and progestin receptors in postmenopausal women by the administration of ethinyl estradiol (see Kreitmann, B., bugat, R. and Bayard, F. Estrogen and Progestin Regulation of the Progesterone Receptor Concentration in Human Endometrium, J. Clin Endocrinol Metab. 491926, 1979). Neumannova et al (see Short- Term Effects of Tamoxifen. Medroxy—progesterone Acetate. and their Combination on Receptor Kinetics and 17beta—Hydroxysteriod Dehydrogenase in Human Endometrium, Obstet. Gynecol. 66:695. 1985) have also demonstrated that administration of medroxy- progesterone acetate in estrogen—primed women decreases the concentration of endometrial progestin receptors while at the same time increasing the activity of l7beta— hydroxysteriod dehydrogenase. an enzyme which is responsible for metabolism of estradiol to the less potent estrone.

A complex interaction occurs between estrogen and progesterone or progestin in the human endometrium with the progestins acting as anti-estrogens. Estrogen and progestin interactions are also dynamic. For example, estrogen administration increased the concentration of both estrogen and progestin receptors to peak levels. 7 times above base1ine,within 3 days (see Ekert. R. L. and Katzenellenbogen, B.S. Human Endometrial Cells in Primary Tissue Culture: Modulation of the Progesterone Receptor Level by Natural and Synthetic Estrogens In Vitro. J. Clin Endocrinal Metab. 52:699. 1981). A three-fold increase in receptorconcentrations occurred within one day. Normal physiologic levels of progesterone in the first 3 days of the luteal phase resulted in :1 repaid and significant decrease in estrogen receptor number (see Kreitmann—Gimbal. B..

Bayard. F.. Nixon. W.E. and Hodgen. GD. Patterns of Estrogen and Progesterone Receptors in Monkey Endometrium During the Normal Menstrual Cycle, Steroids 352471, 1980). Exogenous administration of progesterone to cynomolgous macaques significantly suppressed estrogen receptors within 1 to 2 days (see West. N.B. and Brenner, R.M. Progesterone—Mediated Suppression of Estradiol Receptors in Cynomolgous Macaque Cervix. Endometrium and Oviduct During Sequential Estradiol— Progesterone Treatment, J. Steroid Biochem. 22:29, 1985) and medroxy-progesterone acetate was able to significantly suppress progcstin receptor levels in premenopausal women within 4 hours (see Neumannova M.. Kauppi1a,A.. Kivinen. S. and Vihko, R.

Short—Term Effects of Tamoxifen. Medroxy—progesterone Acetate. and Their Combination on Receptor Kinetics and 17beta-Hydroxysteriod Dehydrogenase in Human Endometrium, Obstet. Gynecol. 66:695. 1985). In contrast, progesterone withdrawal in the presence of constant estrogen levels has been shown to result in rapid (6 to 12 hours) I J L/I recovery of nuclear estrogen receptors in sheep endometrium. associated with an estrogen induced biological response, i.e. production of oxytocin receptors (see Leavitt, W.W..

Okulicz, W.C.. McCracken, J.A.. Schramm, W.S. and Robidous, W.F. Jr. Rapid recovery of nuclear estrogen receptor and oxytocin receptor in the ovine uterus following progesterone withdrawal, J. Steroid Biochcm. 2°:686. 1985). A similar phenomenon occurs in pregnant guinea pigs when estrogen levels rise relative to progesterone levels prior to parturition (see Alexandrova, M. and Soloff, M.S. Oxytocin receptors and parturition in the guinea pig, Biol. Reprod. 22:ll06. 1980).

Therefore, it appears that estrogen acts to stimulate both estrogen and progestin receptor concentrations and to induce sensitivity of the endometrium to both estrogen and progestin. Progesterone or progestin exerts an anti-estrogen action by decreasing estrogen receptors and by increasing l7beta—hydroxysteriod dehydrogenase activity in endometrial tissue. However. it appears that the stimulatory effects of progesterone on human eiidometrial function are of short duration probably because of a self-provoked downregulation of progestin receptors and estrogen receptors. For example the effect of progesterone on 17beta-hyrdoxysteriod dehydrogenase peaks at 3 days and is then followed in 2 to 3 weeks by suppression of the enzyme (see Whitehead, M.l., Townsend, P.T., Pryse-Davies. J. et al. Effects of estrogens and progestins on the biochemistry and morphology of the postmenopausal endometrium, N. Engl. J. Med 30511599, 1981).

Currently on the market there are a number of contraceptive formulations which can be classified readily into several general types. The first of these are known as monophasic formulations. These contain a constant amount of estrogen and progestin. .\luisance side effects with these pills depend on the balance between the estrogen and progestin component of the pill. For example. with a relatively dominant progestin pill, the formulation will. over time. result in a depletion of both estrogen and progestin receptors. The result which might be expected is an under stimulated or atrophic endometrium which may eventually cause either on-pill amenorrhea or breakthrough bleeding or spotting due to poor epithelialization. On the other hand, with a relatively dominant estrogenic preparation. it is possible that prolonged use could result in [J 'Ji endometrial growth with the development of unsupported fragilestroma and subsequent spotting or breakthrough bleeding.

Newer formulations known as triphasics have varying levels of estrogen and progestin; in most cases consisting of relatively constant levels of estrogen with a step- wise increase in progestin throughout the cycle. This pattern of estrogen and progestin administration results in a relatively dominant estrogenic formulation at the beginning of the package with increasing progestagenic activity toward the end of the package.

Endometrial stability may be better with these pills since the estrogenic activity at the beginning of the package induces both estrogen and progestin receptors making the endometrium sensitive to the increased levels of progestin towards the end of the package. The progestin activity produces denser, more stable endometrial stroma although the relatively long duration of progestin exposure. toward the end of the package, may still lead to decreased estrogen and progestin receptors and activity. A significant problem with this type of formulation is the low dose of steroids at the beginning of the package which makes these pills vulnerable to drug interactions or missed pills which may lead to breakthrough ovulation. The beginning of the package is the critical time in terms of breakthrough ovulation since the user has just completed a 7- day drt1g—free interval during which follicular development may begin. Even if pregnancy does not occur, breakthrough ovulation can lead to poor cycle control.

Estrogen replacement therapy is warranted in menopausal women for several reasons. Estrogen replacement will relieve hot flushes and this relief of flushes and night sweats improves sleep patterns and contributes to the patients general feeling of well- being (see Campbell 5., Whitehead M.l. Estrogen therapy and the menopausal syndrome.

In Clinics in Obstetrics and Gynecology: Volume 4. The Menopause. Edited by R. B.

Greenblatt, J.W.W. Studd, London, W.B. Saunders, 1977, pages 31 to 47; Erlik Y. , Tataryn l.V., Meldrum D.R. et al. Association of waking episodes with menopausal hot flushes. JAMA 24:1741, 1981). Estrogen replacement protects against postmenopausal loss of calcium from the skeleton. especially from vertebral bodies, preventing crush fractures and loss of body height (see Lindsay R., Hart D.M., Forrest, C. et al. Prevention './1 of spinal osteoporosis in oophorectomized women. Lancet 2:1 151, 1980). Several studies have now reported that long-term estrogen therapy is also associated with a reduction in the incidence of classical osteoporotic fractures of the forearm and hip (see Hutchinson, T.A.. Polansky, S.M.. Finestein. A. Postmenopausal estrogens protect against fractures of hip and distal radius. Lancet 2:706. 1979; Paganini—Hill. A., Ross, R.K.. Gerkins, V.R. et al. A case control study of menopausal estrogen therapy in hip fractures. Annals of Internal Medicine 95:28. 1981; Weiss N.S.. Ure C.L., Ballard JH. et al. Decreased risk of fractures of the hip and lower forearm with postmenopausal use of estrogen. New England Journal of Medicine 303:1195, 1980). Another beneficial effect of long-term estrogen use is the reduction of the risk ofdeath from ischemic heart disease probably mediated by changes in blood lipoprotein concentrations (see Ross R. K., Paganini—Hill A.. Mack T.M. et al. Menopausal estrogen therapy and protection from ischemic heart disease. Lancet 1:858, 1981). Estrogen replacement has also been shown to improve the vascularity and health of the vaginal mucosa and urinary tract. The only major risk factor associated with estrogen administration in the doses required to relieve menopausal symptoms, is hyperstimulation of the endometrium and an increased risk of endometrial cancer (see Cramer D.W.. Knapp R.C. Review of epidemiologic studies of endometrial cancer and exogenous estrogen. Obstetrics and Gynecology 542521, 1979: Shapiro S., Coughman D.W.. Sloan D., et al. Recent and past use of conjugated estrogens in relation to adenocarcinoma of the endometrium. New England Journal of Medicine 303:485.

). Estrogens predispose to cancer of the endometrium by stimulating cell mitosis and proliferation and increasing the levels of DNA synthesis and nuclear estradiol receptors in the endometrium (see Whitehead M. 1., Townsen P.T., Pryce—Davies J.. et al. Effects of estrogens and progestins on the biochemistry and morphology of the postmenopausal endometrium. New England Journal of Medicine 30521599, 1981; Whitehead M.I., Townsen P.T., Pryce—Davies J., et al. Actions of progestin on the morphology and biochemistry of the endometrium of the postmenopausal women receiving low dose estrogen therapy. American Journal of Obstetrics and Gynecology, 142:791, 1982).

{Q ‘J: The addition of a progestin for 13 days each month has been demonstrated to protect the endometrium from these stimulatory effects of estrogen (see Gambrill R.D., Jr.. Massey F.M., Castaneda et al. Use of the progestogen challenge test to reduce the risk of endometrial cancer. Obstetrics and Gynecology 55:732, 1980; Studd J.W.W., Thom M.H.. Patterson M.E.L., Wade—Evans T. The prevention and treatment ofendometrial pathology in postmenopausal women receiving exogenous estrogens. In: Pasetto N..

Paoletti R., Armhus J. L, Editors. The menopause and postmenopause. Lancester MPT Press. 127. 1980).

The addition of a progestin protects the endometrium by reducing nuclear estradiol receptor concentration and thereby decrease nuclear estrogen bioavailability resulting in an antimitotic effect and lowering DNA synthesis. Progestins also increase the activity of endometrial estradiol-l7beta—dehydrogenase. an enzyme which metabolize estradiol to estrone. a less potent estrogen (see Whitehead M.I., Townsen P. T., Pryce- Davies J. Effects of estrogens and progestins on the biochemistry and morphology of the postmenopausal endometrium. New England Journal of Medicine. 30521599. 1981; King R.J. B., Townsen P.T., Sittle NC. et al. Regulations of estrogen and progesterone receptor levels in epithelium and stroma from pre and postmenopausal endometria.

Journal of Steroids and Biochemistry, 16:21, 1982; Gurpide E. Enzymatic modulation of hormonal action at the target tissue. Journal of Toxicology and Environmental Health, 4:429. 1978). The addition of progestin to estrogen replacement therapy may also result in an increase in bone mass when started within 3 years of the menopause (see Nachtigall L.E.,Nachtiga1l R.H., Nachtigall R.D., et al. Estrogen replacement therapy: A 10 year prospective study in relationship to osteoporosis. Obstetrics and Gynecology 53:277. 1979; Lindsay R., Hart D.M., Forrest C.. et al. Prevention of spinal osteoporosis in oophorectomized women. Lancet 2:1151, 1980). However. concerns have been expressed about the potential adverse effects of progestin in suppressing high density lipoprotein cholesterol concentrations (see Hirvonen E., Malkonen M., Manninen V. Effects of different progestogens on lipoproteins during postmenopausal replacement therapy. New England Journal of Medicine 304560, 1981). This cholesterol fraction appears to have a protective effect against ischemic heart disease and atherosclerosis. The lowering of HDL J ’Ji cholesterol by progestin could negate the long—term beneficial effects of estrogen in reducing the incidence of myocardial infraction. Other side effects of progestins include acne. breast tenderness, depression and irritability (see Barranco V.P. Effect of androgen dominant and estrogen dominant oral contraceptives on acne. Cutis 14384, 1974; Royal College of General Practitioners. Oral Contraceptives and Health: An Interim Report.

New York: Pitman 1974). Since the side effects of progestins appear to be dose dependent, the dose of progestin used with postmenopausal estrogen replacement should be the minimum necessary to achieve endometrial protection. (see Padwick M.L.. Pryce- Davies 1.. Whitehead M.l. A simple method for determining the optical dosage of progestin in postmenopausal women receiving estrogens. New England Journal of Medicine 315930, 1986).

The biological effects of both estrogen and progestin in target tissues such as the endometrium are dependent on the levels of estrogen and progestin receptors. Both estrogen and progestins exert a modulating influence on the levels of their own receptors.

For example, in the luteal phase of the menstrual cycle, serum progesterone levels increase and progesterone mediated secretory changes occur in the uterine endometrium.

The presence of progesterone receptors has been shown to be a necessary prerequisite for progesterone action in the endometrium (see Walters M.R. and Clark J.H. Relationship between the quantity of progesterone receptors and the antagonism of estrogen—induced uterotropic response. Endocrinology 105:382. 1979) and it is well documented that estrogen priming in the follicular phase of the cycle is responsible for the development of both estrogen and progesterone receptors (see Bayard F.. Damilano S.. Robel P. and Baulieu E.E. Cytoplasmic and nuclear estradiol and progesterone receptors in human endometrium. Journal Clinical Endocrinology and Metabolism 46:635. 1978). On the other hand. progesterone exerts a negative feedback effect on its own receptor (see Tseng Lt. And Gurpide E. Effects of progestins on estradiol receptor levels in human endometrium. Journal Clinical Endocrinology and Metabolism 411402, 1975) and also acts to downregulate endometrial estrogen receptors possibly by induction of an estrogen receptor regulatory factor (see L/eavitt W.W., Okulicz W.C.. McCracl W.S. and Robidoux W.F. Jr. Rapid recovery of nuclear estrogen receptor and oxytocin [Q ‘J: receptor in the ovine uterus following progesterone withdrawal. Journal Steroid Biochemistry 22:686. l985).

Current hormonal replacement consists of continuous (daily or cyclic) (example day I-25 of each month) estrogen administration with the addition of a progestin for 10- 13 days (example day l3—25) each month. This type of replacement regimen is effective in preventing menopausal symptoms and at the same time, protects the endometrium against the development of hyperplasia or adenocarcinoma. However, the cyclic administration of a progestin leads to a scheduled withdrawal bleed or period in 65-75% of women (see Hellberg D.. Nilsson Comparison of a triphasic estradiol/norethisterone acetate preparation with and without estriol component in the treatment of climacteric complaints; Maturitas 5:233. 1984; Christensen M.S., Hagen C., Christiansen C, Transbol 1. Dose response evaluation of cyclic estrogen/gestagen in postmenopausal women: Placebo controlled trial of its gynecologic and metabolic actions. American Journal of Obstetrics and Gynecology. l44:873, 1982). This withdrawal bleeding is usually not welcomed by the patient and can lead to problems with compliance. Also because the progestin administration is preceded by up to 13-16 day of unopposed estrogen therapy with endometrial proliferation and estrogen and progestin receptor induction, it is possible that a high dose of progestin is required to antagonize these effects resulting in a greater chance of side effects and adverse metabolic effects. Newer continuous low dose estrogen and progestin regimens for hormonal replacement may avoid the problem of withdrawal bleeding (see Magos A.L., Brincatt M., O'Dowd et al. Amenorrhea and endometrial atrophy following continuous oral estrogen and progestogen therapy in postmenopausal women. Maturitas 6:145, l984). However, daily administration of a progestin in these regimens induces depletion of both estrogen and progestin receptors resulting in endometrial atrophy which may e associated with breakthrough bleeding. Since abnormal bleeding in a postmenopausal woman is known to be associated with endometrial carcinoma, it must be investigated by endometrial sampling for hypertrophy usually by D&C. Daily administration of a progestin also raises the concern that the favourable effects of estrogen on HDL cholesterol metabolism will be adversely affected with a fall in HDL cholesterol (see Notelovitz M.. Gudat J.C., Ware ,\/l.D.. Dougherty M.C., British Journal of Obstetrics and Gynecology. 90:171. 1983).

The present invention provides a hormone replacement product containing estrogen and progestin as a combined preparation for administering a plurality of unity dosages of a relatively dominant estrogen activity combination and for administering a plurality of unit dosages of a relatively dominant progestin activity combination in which the unit dosages are arranged for the administration to a female in need of hormone replacement therapy continuously and consecutively alternately of a number of unit dosages of the relatively dominant estrogen activity combination and of a number of unit dosages of the relatively dominant progestin activity combination, each said number of unit dosages consisting of 1 to 15 unit dosages.

Each of said numbers of unit dosages is preferably 2 to 4 and most preferably 3 unit dosages.

The product may be presented in the form of packages each containing 20 to 35 unit dosages.

The female treated by the invention by hormone replacement therapy is for instance of child bearing age or older in whom ovarian estrogen and progesterone production has been interrupted either because of natural menopause, surgical, radiation or chemical ovarian ablation of extirpation or premature ovarian failure.

The invention also provides the new use of estrogen and progestin in the manufacture of the new product.

Thus, in the present disclosure, a formulation is described that is better able to protect the endometrium against the estrogen related risk of endometrial hyperplasia and adenocarcinoma with a lower dose of progestin by administering progestin for a short period of time alternating with a short period of absent or reduced progestin. It has been I J U: demonstrated that a protective effect of progestin is related to the duration of administration with 12-13 days per month appearing to be the minimum required for greatest protection. The present formulation administers a low dos of progestin intermittently throughout the month for a minimum of 15 days exposure.

The present invention provides a pharmaceutical preparation for administration to a female of child bearing age or older in whom ovarian estrogen and progesterone production has been interrupted either because of natural menopause. surgical. radiation. or chemical ovarian ablation or extirpation or premature ovarian failure. which comprises a plurality of unit dosages. each unit dosage for continuous consecutive daily administration and comprising combinations of estrogen and progestin selected from a combination with relatively dominant estrogen activity, with a plurality of dominant estrogen dosages being alternated with plurality of dominant progestin dosages, and each unit dosage also comprising a pharmaceutically acceptable inert carrier when required.

In another aspect, the invention provides the use of estrogen and progestin in a method of manufacture of a product for use in a method of hormonal replacement therapy for administration to a female in need of such treatment, in particular to a female of child bearing age or older women whom ovarian estrogen and progesterone production has been interrupted either because of natural menopause. surgical. radiation. or chemical ovarian ablation or extirpation or premature ovarian failure. which comprises administering continuously and consecutively. in daily sequence, alternately of a number of relatively dominant progestin activity unit dosages and of a number of the dominant estrogen activity unit dosages, each said number of unit dosages consisting ofl to 5 unit dosages.

The hormonal replacement formulation of the present invention results in the absence of withdrawal bleeding’ intermittent increases in estrogen activity; and stimulation of endometrial growth and progestin receptors. This makes the endometrium more sensitive to subsequent progestin activity which limits growth by decreasing estrogen receptors and increasing l7beta-hydroxysteriod dehydrogenase. Interaction of I Q 'Ji progestin with progestin receptors induces secretory changes in the endometrium which results in a denser stroma and endometrial stability. A return to relatively dominant estrogenic activity then again stimulates estrogen and progestin receptors and renews endometrial sensitivity of progestin. This push/pull activity keeps endometrial activity within a narrow range depending on the number of days of estrogenic and progestagenic activity and maintains a stable endometrium resulting in the absence of breakthrough or withdrawal bleeding.

This hormonal replacement formulation allows better progestational effects with less progestin. With the current formulation the dose of progestin is significantly decreased compared with a preparation containing constant daily administration of a progestin. A total steroid dosage is achieved which is similar to or even lower than that of the present cyclic method of administering estrogen and progestin for hormonal replacement therapy of ovarian failure. A reduction in progestin dosage results in less negative impact on HDL cholesterol levels. HDL cholesterol has been shown to be protective against the development of atherosclerosis. The concentration of HDL cholesterol is increased by estrogen and decreased by progestin.

The estrogens which maybe employed as a component in the regimens of this invention may be any of those conventionally available. Typically, the estrogen may be selected from the group comprising synthetic and natural estrogens. The synthetic estrogens may be selected from, for example, ethinyl estradiol, mestranol and quinestranol. Particularly of interest are l7alpha-ethinylestradiol and esters and ether thereof. The preferred estrogen is 17alpha—ethinylestradiol. The natural estrogens may include, for example, conjugated equine estrogens, estradiol-17beta, estradiol valerate, estrone. piperazine estrone sulphate, estriol, estriol succinate, desogestrel and polyestrol phosphate.

The progestin component may be any progestationally active compound. Thus. the progestin may be selected from progesterone and its derivatives such as, for example, l7-hydroxy progesterone esters. 19-nor-l7—hydroxy progesterone esters, l7alpha— l J ‘J1 ethinyltestosterone and derivatives thereof. 17alpha—ethinyl—l9-nor-testosterone and derivatives thereof. norethindrone. norethindrone acetate. ethynodiol diacetate. dydrogesterone. medroxy-progesterone acetate. norethynodrel. allylestrenol. lynoestrenol. ftiingestanol acetate, medrogestone. norgestrienone, dimethiderome, ethisterone, cyproteronc, lavo—norgestrel. d-norgestrel, dl—norgestrel, d-17alpha-acetoxy-13beta-ethyl- l7alpha-ethinyl-gon—4-enone oxime, cyproterone acetate, gestodene and norgestimate.

Preferred progestins are norethindrome, d—norgestrel and norgestimate.

In the invention. the plurality of dosages may comprise from one to five unit dosages, but preferably three unit dosages are employed. Thus, in a preferred form of the invention. three unit dosages of relatively dominant estrogen activity are alternated with three unit dosages of relatively dominant progestin activity.

Generally. the quantities of estrogen and progestin incorporated in the formulation of the invention are dependent on the type of estrogen or progestin selected. However. the quantities employed are generally less than those used in the currently marketed formulations for reasons mentioned earlier. In the present formulation, the estrogen level is kept constant. while the progestin level is adjusted up or down to produce the required estrogen or progestin dominance. The selection of quantity is dependent on the type of estrogen or progestin since each hormone has its own specific activity.

Typically in the hormone replacement formulations, the amount of estrogen per unit dose may range from a minimum of about O.3mg of estrone sulphate or its equivalent to a maximum of about 2.5mg of estrone sulphate or its equivalent. The amount of progestin per unit dosage may range from a minimum of 0mg to a maximum of about mg of norethindrone or its equivalent. (These amounts generally refer to oral dosages).

Some preferred combinations include the following: 1. Three unit dosages of 0.75mg piperazine estrone sulphate alternating with three unit dosages of 0.75mg of piperazine estrone sulphate with 035mg of norethindrone. _. Three unit dosages of tl.75mg piperazine estrone sulphate and 015mg of norethindrone alternating with three unit dosages of O.75mg of piperazine estrone sulphate and 0.35mg of norethindrone.

The above combinations may also be grouped into three's and four's, starting with either three or four day groups and ending with the other. For the hormone replacement therapy it may be advantageous for the groups of dominant estrogen activity combination to comprise one more unit dosage than the dominant progestin activity combination unit dosages, or vice versa, for instance the numbers in the groups being 2 and 3 or 3 and 4.

The formulations of the invention my be administered orally, preferably in tablet form, parenterally, sublingually. transdermally, intravaginally, intranasally or buccally. The method of administration determines the types of estrogens and progestins useful in the formulation, as well as the amount per unit dosage.

Methods for transdermal administration including the associated methods for manufacturing such systems are well known in the art. In this connection, reference may be had to US. Patent Nos. 4, 752, 478, 4, 685, 911, 4, 438, 139 and 4, 291. 014.

Generally speaking, the formulations are prepared according to conventionally known procedures in accordance with the method of administration. Thus. the active ingredients are prepared according to known methods in pharmaceutically acceptable form for administration. These ingredients, in their required quantities are combined with the appropriate pharmaceutical carriers such as additives. vehicles and/or flavour ameliorating substances. These substances may be referred to as diluents, binders and lubricants. Gums. starches and sugars are also common terms. Typical of these types of substances or excipients are pharmaceutical grades of mannitol, lactose ’_/I IQ 'Jt starch. magnesium stearate, sodium saccharin, talcum, cellulose. glucose, sucrose, magnesium carbonate and the like. The active ingredient (s) may comprise from about 0.1% by weight to about 99.99% by weight of total formulation and the remainder comprises the pharmaceutically acceptable carrier. The percentage of active ingredient(s) may vary according to the delivery system or method of administration and it chosen in accordance with conventional methods known in the art.

Thus, the active ingredients are compounded with the chosen carrier and in for example the case of a tablet form, placed in a table molding apparatus to form the tablets which are subsequently packaged in accordance with the chosen regimen. ln the oral form of the formulation. the contraceptives are preferably produced in the form of a pharmaceutical kit or package, with the daily dosages arranged for proper sequential administration. Thus, in another aspect. the present invention also provides a pharmaceutical package which contains combination- typc contraceptives in multiple dosage units in a synchronized. fixed sequence. wherein the sequence or arrangement of the dosage units corresponds to the stages of daily administration. This can be know as a multi-preparation pack.

Preferably, such packages are in the form of a transparent package with twenty—eight dosage units arranged sequentially.

Preferably the placebo tablets and tablets containing the hormones are different colours or shapes, Data indications may be provided on the packaging.

The packaging may be a tube or box or a strip. The box may be circular. square. or otherwise shaped with the tablets being accommodated separately therein for ease of administration. Date indications may appear adjacent each tablet corresponding with the days on which each tablet is to be taken. Some indication of the sequence in which the tables are to be taken preferably appears on the packaging regardless of its form.

In the following examples, specific embodiments of the present invention are set forth. These are meant to be illustrative of the invention and are not meant to limit it in any way. All parts and percentages are by weight, unless indicated otherwise.

Both subjects found and the test formulation to be acceptable in terms of cycle control, side effects and menstrual bleeding.

Examples Illustrating the Hormone-Replacement Therapy EXAMPLE I Three-day phases of unit dosages of 0.75mg piperazine estrone sulphate alternating with three-day phases of unit dosages of estrone sulphate 0.75mg and NET 0.35mg given continuously and orally.

EXAMPLE 2 Three-day phases (unit dosages of estrone sulphate 0.75mg and norethindrone 0.l5mg) alternating with three—day phases of estrone sulphate .75mg and norethindrone O.35mg give continuously and orally.

EXAMPLE 3 Three—day phases or oral micronized l7beta-estradiol lmg alternating with three—days of l7beta—estradiol lmg and norethindrone .35mg given continuouslv EXAMPLE 4 Three—day phases of transdermal l7beta-estradiol (100 ugVday) alternating with three days of transdermal 17beta—estradiol (100 ug/day) and transdermal norethindrone (.35mg/day) given continuously.

EXAMPLE 5 Three-day phases of estrone sulphate 1.25mg alternating with three—day phases of estrone sulphate l.25mg and norethindrone 0.35mg given continuously and orally.

EXAMPLE 6 Three—day phases of estrone sulphate l.25mg alternating with three—day phases of cstrone sulphate l.25mg and norethindrone O.5mg given continuously and orally.

EXAMPLE 7 One-day or two-day alternating phases using the unit dosage set forth in Examples 1 and 2 given continuously and orally.

EXAMPLE 8 Three—day phases of estrone sulphate 0.75mg alternating with three-day phases of estrone sulphate 0.75mg and norgestimate 0.050mg given continuously and orallv [J '1! EXAMPLE 9 Three—day and four—day phases of each of the combinations as set forth in Examples 1 and 2, starting with either a 3- or 4-day phase and given continuously and orally, EXAMPLE 10 Two-day and three-day phases of each of the combinations as set forth in Examples 1 and '2, starting with either a 2-or 3-day phase and given continuously and orally.

EXAMPLE 1] Three—day phases of unit dosages of O.75mg piperzaine estrone sulphate alternating with three-day phases of unit dosages of estrone sulphate 0.75mg and NET O.35mg given continuously and orally, EXAMPLE 12 Three-day phases (unit dosages of estrone sulphate O.75mg and norethindrone O.15mg) alternating with three-day phases of estrone sulphate .75mg and norethindrone 035mg given continuously and orally.

EXAMPLE 13 Three—day phases of oral micronized 17beta—estradi0l lmg alternating with three-days of l7beta—estradiol lmg and norethindrone .35mg given continuously.

EXAMPLE 14 Thrce—day phases of transdcrmal 17be1a—estradi01 (100ug¢’day) alternating with three—days of Iransdcrmal 17-beta—estradiol (100ug/day) and transdermal norethindrone (.35mg*’da_v) given continuously.

Claims (1)

1.Claims: A hormone replacement preparation containing estrogen and progestin as a combined preparation in which a plurality of unit dosages are arranged for the continuous and consecutive administration to a female in need of hormone replacement alternately of a number of relatively dominant estrogen activity unit dosages and of a number of relatively dominant progestin activity unit dosages, each said number of unit dosages consisting of 1 to 5 unit dosages. A preparation according to claim 1 wherein the female to be treated is of child bearing age or older in whom ovarian estrogen and progesterone production _ has been interrupted either because of natural menopause, surgical, radiation or chemical ovarian ablation or extirpation or premature ovarian failure. A preparation according to claim l or 2 in which each said number of unit dosages consists of 2 to 4 unit dosages. A preparation according to any preceding claim in which each said number of unit dosages consists of} unit dosages. A preparation according to any preceding claim in which unit dosages are administered orally, parenterally, sublingually, transdermally, intravaginally, intranasally or buccally. A preparation according to claim 5 in which unit dosages are administered orally. A preparation according to claim 5 in which unit dosages are administered transderrnally A preparation according to any preceding claim in which the estrogen is selected from synthetic estrogens, selected from l7alpha~ethinylestradiol and esters and ethers thereof, ethinyl estradiol, mestranol and quinestranol and from natural estrogens selected from conjugated equine estrogens, l7beta- estradiol, estradiol valerate, estrone, estrone sulphate, piperazine estrone sulphate, estriol, estriol succinate and polyestrol phosphate. «A preparation according to claim 8 in which the estrogen is selected from estrone sulphate, piperazine estrone sulphate and l7beta estradiol. 10. A preparation according to any preceding claim in which the progestin is selected fromprogesterone, 17-hydroxy progesterone esters, l9-nor—l7- hydroxyprogesterone esters, l7alpha-ethinyl-testosterone, and derivatives thereof l7alpha—ethinyl-l9~nor-testosterone and derivatives thereof, norethindrone, norethindrone acetate, ethynodiol diacetate, dydrogesterone, medroxyprogesterone acetate, norethynodrel, allylestrenol, lynoestrenol, quingestanol acetate medrogestone, norgestrienone, dimethisterone, ethisterone, cyproterone, cyproterone acetate, levo—norgestrel, d—norgestrel, d]- norgestrel, d—l 7alpha—acctoxy— 1 3beta—ethyl— I 7alpha-ethinyl—gon-4—enone oxime, gestodene, norgestimate and desogestrel. A preparation according to claim 10 in which the progestin is norethindrone or norgestimate or progesterone. A preparation according to any preceding claim in which the amount of estrogen per unit dosage ranges from a minimum of about 0.3 mg to a maximum of about 5.0 mg of piperazine estrone sulphate or its equivalent dosage in another synthetic or natural estrogen and the amount of progestin per unit dosage may range from a minimum of about 0.0 mg to a maximum of - about 5.0 mg of norethindrone or its equivalent in a synthetic or natural progestin_ . A preparation according to claim 12 in which the amount of estrogen per unit dosage ranges from 0.3 mg to 2.5 mg of piperazine estrone sulphate or its equivalent. . A preparation) according to claim 32 or 13 in which the unit dosages are for oral administration and each said number is l. 2, 3 or 4 and the relatively dominant estrogen activity combination unit dosages contain 0.75 mg piperazine estrone sulphate and the relatively dominant progestin activity combination unit dosages contain 075 mg piperazine estrone sulphate and 0.35 mg norethindrone. . A preparation according to claim i2 or 13 in which the unit dosages are for oral administration and each said number is l, 2, 3 or 4 and in which the dominant estrogen combination unit dosages contain 0.75 mg piperazine estrone sulphate and 0. l 5 mg norethindrone and the dominant progestin combination unit dosages contain 0.75 piperazine estrone sulphate and 0.35 mg norethindrone. A preparation according to claim l4 or l5 in which the unit dosages are for administration in alternating groups of three of each type of hormone- containing unit dosage. . A preparation according to claim 12 or 13 in which each said number is 3 and in which the relatively dominant estrogen activity combination dosages contain 1 mg 17-beta estradiol and the relatively dominant progestin activity combination dosages contain 1 mg l7—beta estradiol and 0.35 mg norethindrone and each is administered orally. A preparation according to claim 12 or 13 in which each said number is 3 and in which the relatively dominant estrogen activity combination unit dosage contains 075 mg estrone sulphate and the relatively dominant progestin activity combination unit dosage contains 0.75 mg estrone sulphate and 0.050 mg norgestimate each administered orally. A preparation according to claim 12 or 13 in which each said number is 3 and in which the relatively dominant estrogen activity combination unit dosage contains 125 mg estrone sulphate and the relatively dominant progestin combination contains 1.25 mg estrone sulphate and either 0.35 mg or 0.5 mg norethindrone each administered orally. A preparation according to claim 12 or 13 in which each said number is 1, 2, 3 or 4 and in which the relatively dominant estrogen activity combination contains 0.75 mg estrone sulphate and 0.15 mg norethindrone and the relatively dominant progestin activity combination contains 0.75 estrone sulphate and 0.35 mg norethindrone each administered orally. 6 A preparation according to claim 12 or 13 in which the unit dosages are for transdermal administration and are for administration in alternating three day periods of l 7beta-estradiol at 0.] mg/day and three day periods of l7beta- estradiol at 0.1 mg/day plus norethindrone at 0.35 mg/day. . Use of estrogen and progestin in a method of manufacturing a product characterised in that the product is for hormone replacement therapy and contains estrogen and progestin as a combined preparation for administering to a female in need of hormone therapy continuously and consecutively alternately ofa number of relatively dominant estrogen activity unit dosages and of a number of relatively dominant progestin activity unit dosages, each said number ofunit dosages consisting of l to 5 unit dosages. _ . Use according to claim 22 which is for administration to a female of child bearing age or older in whom ovarian estrogen and progesterone production has been interrupted either because of natural menopause, surgical, radiation or chemical ovarian ablation or extirpation or premature ovarian failure. Use according to claim 22 or 23 in which the product has the further features as defined in any of claims 3 to 2}. A hormone replacement preparation according to any one of claims l to 21 substantially as hereinbefore described with reference to the examples. Use according to any one of claims 22 to 24 substantially as hereinbefore described with reference to the examples. Tomkins & Co.