1. Name Of The Medicinal Product
Progynova® TS 100 micrograms/24 hours Transdermal Patch
2. Qualitative And Quantitative Composition
Each 25 cm2 patch contains 7.6 mg estradiol (formed from 7.8 mg estradiol hemihydrate), releasing a nominal 100 micrograms of estardiol per 24 hours.
For excipients, see 6.1.
3. Pharmaceutical Form
Transdermal patch
Oval transdermal patch with a translucent homogenous matrix on a transparent carrier film.
4. Clinical Particulars
4.1 Therapeutic Indications
• Hormone replacement therapy for oestrogen deficiency symptoms in postmenopausal women more than 1 year postmenopause.
• Prevention of osteoporosis in postmenopausal women at high risk of future fractures who are intolerant of, or contraindicated for, other medicinal products approved for the prevention of osteoporosis.
(See also Section 4.4)
4.2 Posology And Method Of Administration
• Posology
Progynova TS 100 is an oestrogen-only patch applied to the skin once weekly.
For initiation and continuation of treatment of postmenopausal symptoms, the lowest effective dose for the shortest duration (see also Section 4.4) should be used. Treatment to control menopausal symptoms should be initiated with the lowest Progynova TS patch dose. If considered necessary, a higher dosed patch should be used. Once treatment is established the lowest effective dose patch necessary for relief of symptoms should be used.
For prevention of postmenopausal osteoporosis Progynova TS 50 is recommended. Women receiving Progynova TS 100 for postmenopausal symptoms can continue at this dose.
In women with an intact uterus, a progestogen should be added to Progynova TS 100 for at least 12-14 days each month. Unless there is a previous diagnosis of endometriosis, it is not recommended to add a progestogen in hysterectomised women.
For continuous use: The patches should be applied once weekly on a continuous basis, each used patch being removed after 7 days and a fresh patch applied to a different site.
For cyclical use: The patches may also be prescribed on a cyclical basis. Where this is the preferred option, the patches should be applied weekly for 3 consecutive weeks followed by a 7-day interval, without a patch being applied, before the next course.
• How to start Progynova TS 100
Women who do not take oestrogens or women who change from a continuous combined HRT product may start treatment at any time.
Patients changing from a continuous sequential HRT regimen, should begin the day following completion of the prior regimen.
Patients changing from a cyclic HRT regimen should begin the day after the treatment-free period.
• Missed or lost patch
In the event that a patch falls off before 7 days are up, it may be reapplied. If necessary, a new patch should be applied for the remainder of the 7-day dosing interval.
If the patient forgets to replace a patch, this should be done as soon as possible after she remembers it. The next patch has to be used after the normal 7-day interval.
After several days without replacement of a new patch there is an increased likelihood of breakthrough bleeding and spotting.
• Mode of application
Following removal of the protective liner the adhesive side of Progynova TS patches should be placed on a clean, dry area of the skin of the trunk or buttocks. Progynova TS patches should not be applied to the breasts. The sites of application should be rotated, with an interval of at least one week between applications to a particular site. The area selected should not be oily, damaged, or irritated. The waistline should be avoided since tight clothing may rub the patch off. The patch should be applied immediately after opening the pouch and removing the protective liner. The patch should be pressed firmly in place with the palm of the hand for about 10 seconds, making sure there is good contact, especially around the edges.
The patch should be changed once weekly.
If the patch is applied correctly, the patient can bath or shower as usual. The patch might, however, become detached from the skin in very hot bath water or in the sauna.
Children
Not recommended for children
4.3 Contraindications
• Known, past or suspected breast cancer
• Known or suspected oestrogen dependent malignant tumours, e.g. endometrial cancer
• Undiagnosed genital bleeding
• Untreated endometrial hyperplasia
• Previous idiopathic or current venous thromboembolism (deep venous thrombosis, pulmonary embolism)
• Active or recent arterial thromboembolic disease (e.g. angina, myocardial infarction)
• Acute liver disease, or history of liver disease as long as liver function tests have failed to return to normal
• Porphyria
• Known hypersensitivity to the active substance or any of the excipients
4.4 Special Warnings And Precautions For Use
For the treatment of postmenopausal symptoms, HRT should only be initiated for symptoms that adversely affect quality of life. In all cases, a careful appraisal of the risks and benefits should be undertaken al least annually and HRT should only be continued as long as the benefit outweighs the risk.
Medical examination/follow up:
• Before initiating or reinstituting HRT, a complete personal and family medical history should be taken. Physical (including pelvic and breast) examination should be guided by this and by the contraindications and warnings for use. During treatment, periodic check-ups are recommended of a frequency and nature adapted to the individual woman. Women should be advised what changes in their breasts should be reported to their doctor or nurse. Investigations, including mammography, should be carried out in accordance with currently accepted screening practices, modified to the clinical needs of the individual.
Conditions which need supervision
• If any of the following conditions are present, have occurred previously, and/or have been aggravated during pregnancy or previous hormone treatment, the patient should be closely supervised. It should be taken into account that these conditions may recur or be aggravated during treatment with Progynova TS 100, in particular:
- Leiomyoma (uterine fibroids) or endometriosis
- A history of, or risk factors for, thromboembolic disorders (see below)
- Risk factors for oestrogen dependent tumours, e.g. 1 st degree heredity for breast cancer
- Hypertension
- Liver disorders (e.g. liver adenoma)
- Diabetes mellitus with or without vascular involvement
- Cholelithiasis
- Migraine or (severe) headache
- Systemic lupus erythematosus.
- A history of endometrial hyperplasia (see below)
- Epilepsy
- Asthma
- Otosclerosis
- Hereditary angioedema
Reasons for immediate withdrawal of therapy:
Therapy should be discontinued in case a contra-indication is discovered and in the following situations:
- Jaundice or deterioration in liver function
- Significant increase in blood pressure
- New onset of migraine-type headache
- Pregnancy
Endometrial hyperplasia
• The risk of endometrial hyperplasia and carcinoma is increased when oestrogens are administered alone for prolonged periods (see section 4.8). The addition of a progestogen for at least 12 days per cycle in non-hysterectomised women greatly reduces this risk.
• For Progynova TS 100 (100 μg/day) the endometrial safety of added progestogens has not been studied.
• Break-through bleeding and spotting may occur during the first months of treatment. If break-through bleeding or spotting appears after some time on therapy, or continues after treatment has been discontinued, the reason should be investigated, which may include endometrial biopsy to exclude endometrial malignancy.
• Unopposed oestrogen stimulation may lead to premalignant or malignant transformation in the residual foci of endometriosis. Therefore, the addition of progestogens to oestrogen replacement therapy should be considered in women who have undergone hysterectomy because of endometriosis, if they are known to have residual endometriosis.
Breast cancer
• A randomised placebo-controlled trial, the Women's Health Initiative study (WHI), and epidemiological studies, including the Million Women Study (MWS), have reported an increased risk of breast cancer in women taking oestrogens, oestrogen-progestogen combinations or tibolone for HRT for several years (see Section 4.8). For all HRT, an excess risk becomes apparent within a few years of use and increases with duration of intake but returns to baseline within a few (at most five) years after stopping treatment.
• In the MWS, the relative risk of breast cancer with conjugated equine oestrogens (CEE) or estradiol (E2) was greater when a progestogen was added, either sequentially or continuously, and regardless of type of progestogen. There was no evidence of a difference in risk between the different routes of administration.
• In the WHI study, the continuous combined conjugated equine oestrogen and medroxyprogesterone acetate (CEE + MPA) product used was associated with breast cancers that were slightly larger in size and more frequently had local lymph node metastases compared to placebo.
• HRT, especially oestrogen-progestogen combined treatment, increases the density of mammographic images which may adversely affect the radiological detection of breast cancer.
Venous thromboembolism
• HRT is associated with a higher relative risk of developing venous thromboembolism (VTE), i.e. deep vein thrombosis or pulmonary embolism. One randomised controlled trial and epidemiological studies found a two- to threefold higher risk for users compared with non-users. For non-users, it is estimated that the number of cases of VTE that occur over a 5 year period is about 3 per 1000 women aged 50-59 years and 8 per 1000 women aged between 60-69 years. It is estimated that in healthy women who use HRT for 5 years, the number of additional cases of VTE over a 5 year period will be between 2 and 6 (best estimate = 4) per 1000 women aged 50-59 years and between 5 and 15 (best estimate = 9) per 1000 women aged 60-69 years. The occurrence of such an event is more likely in the first year of HRT than later.
• Generally recognised risk factors for VTE include a personal history or family history, severe obesity (BMI > 30 kg/m 2 ) and systemic lupus erythematosus (SLE). There is no consensus about the possible role of varicose veins in VTE.
• Patients with a history of VTE or known thrombophilic states have an increased risk of VTE. HRT may add to this risk. Personal or strong family history of thromboembolism or recurrent spontaneous abortion should be investigated in order to exclude a thrombophilic predisposition. Until a thorough evaluation of thrombophilic factors has been made or anticoagulant treatment initiated, use of HRT in such patients should be viewed as contraindicated. Those women already on anticoagulant treatment require careful consideration of the benefit-risk of use of HRT.
• The risk of VTE may be temporarily increased with prolonged immobilisation, major trauma or major surgery. As in all postoperative patients, scrupulous attention should be given to prophylactic measures to prevent VTE following surgery. Where prolonged immobilisation is liable to follow elective surgery, particularly abdominal or orthopaedic surgery to the lower limbs, consideration should be given to temporarily stopping HRT 4 to 6 weeks earlier, if possible. Treatment should not be restarted until the woman is completely mobilised.
• If VTE develops after initiating therapy, the drug should be discontinued. Patients should be told to contact their doctors immediately when they are aware of a potential thromboembolic symptom (e.g. painful swelling of a leg, sudden pain in the chest, dyspnoea).
Coronary artery disease (CAD)
• There is no evidence from randomised controlled trials of cardiovascular benefit with continuous combined conjugated oestrogens and medroxyprogesterone acetate (MPA). Two large clinical trials (WHI and HERS, i.e. Heart and Estrogen/progestin Replacement Study) showed a possible increased risk of cardiovascular morbidity in the first year of use and no overall benefit. For other HRT products there are only limited data from randomised controlled trials examining effects in cardiovascular morbidity and mortality. Therefore, it is uncertain whether these findings also extend to other HRT products.
Stroke
• One large randomised clinical trial (WHI-trial) found, as a secondary outcome, an increased risk of ischaemic stroke in healthy women during treatment with continuous combined conjugated oestrogens and MPA. For women who do not use HRT, it is estimated that the number of cases of stroke that will occur over a 5 year period is about 3 per 1000 women aged 50-59 years and 11 women per 1000 women aged 60-69 years. It is estimated that for women who use conjugated oestrogens and MPA for 5 years, the number of additional cases will be between 0 and 3 (best estimate = 1) per 1000 users aged 50-59 years and between 1 and 9 (best estimate = 4) per 1000 users aged 60-69 years. It is unknown whether the increased risk also extends to other HRT products.
Ovarian cancer
• Long-term (at least 5-10 years) use of oestrogen only HRT products in hysterectomised women has been associated with an increased risk of ovarian cancer in some epidemiological studies. It is uncertain whether long-term use of combined HRT confers a different risk than oestrogen-only products.
Other conditions
• Oestrogens may cause fluid retention, and therefore patients with cardiac or renal dysfunction should be carefully observed. Patients with terminal renal insufficiency should be closely observed, since it is expected that the level of circulating active ingredients in Progynova TS is increased.
• Women with pre-existing hypertriglyceridemia should be followed closely during oestrogen replacement or hormone replacement therapy, since rare cases of large increases of plasma triglycerides leading to pancreatitis have been reported with oestrogen therapy in this condition.
• Oestrogens increase thyroid binding globulin (TBG), leading to increased circulating total thyroid hormone, as measured by protein-bound iodine (PBI), T4 levels (by column or by radio-immunoassay) or T3 levels (by radio-immunoassay). T3 resin uptake is decreased, reflecting the elevated TBG. Free T4 and free T3 concentrations are unaltered. Other binding proteins may be elevated in serum, i.e. corticoid binding globulin (CBG), sex- hormone-binding globulin (SHBG) leading to increased circulating corticosteroids and sex steroids, respectively. Free or biological active hormone concentrations are unchanged. Other plasma proteins may be increased (angiotensinogen/renin substrate, alpha-I-antitrypsin, ceruloplasmin).
• Chloasma may occasionally occur, especially in women with a history of chloasma gravidarum. Women with a tendency to chloasma should minimise exposure to the sun or ultraviolet radiation whilst taking HRT.
• There is no conclusive evidence for improvement of cognitive function. There is some evidence from the WHI trial of increased risk of probable dementia in women who start using continuous combined CEE and MPA after the age of 65. It is unknown whether the findings apply to younger postmenopausal women or other HRT products.
4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction
The metabolism of oestrogens may be increased by concomitant use of substances known to induce drug-metabolising enzymes, specifically cytochrome P450 enzymes, such as anticonvulsants (e.g. phenobarbital, phenytoin, carbamezapine) and anti-infectives (e.g. rifampicin, rifabutin, nevirapine, efavirenz).
Ritonavir and nelfinavir, although known as strong inhibitors, by contrast exhibit inducing properties when used concomitantly with steroid hormones. Herbal preparations containing St. John's wort (Hypericum Perforatum) may induce the metabolism of oestrogens.
At transdermal administration, the first-pass effect in the liver is avoided and, thus, transdermally applied oestrogens might be less affected than oral hormones by enzyme inducers.
Clinically, an increased metabolism of oestrogens and progestogens may lead to decreased effect and changes in the uterine bleeding profile.
4.6 Pregnancy And Lactation
• Pregnancy
Progynova TS is not indicated during pregnancy. If pregnancy occurs during medication with Progynova TS treatment should be withdrawn immediately.
The results of most epidemiological studies to date relevant to inadvertent foetal exposure to oestrogens indicate no teratogenic or foetotoxic effects.
• Lactation
Progynova TS is not indicated during lactation.
4.7 Effects On Ability To Drive And Use Machines
None known.
4.8 Undesirable Effects
During the first few months of treatment, breakthrough bleeding, spotting and breast tenderness or enlargement can occur. These are usually temporary and normally disappear after continued treatment. The table below lists adverse drug reactions recorded in clinical studies as well as adverse drug reactions reported post-marketing. Adverse drug reactions were recorded in 3 phase III clinical studies (n = 611 women at risk) and were included in the table when considered at least possibly related to treatment with 50 µg/day estradiol or 100 µg/day estradiol, respectively, following transdermal application.
The experience of adverse drug reactions is overall expected in 76% of the patients. Adverse drug reactions appearing in > 10% of patients in clinical trials were application site reactions and breast pain.
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1 have been reported in single cases. Given the small study population (n=611) it cannot be determined based on these results if the events are uncommon or rare.
Breast cancer
According to evidence from a large number of epidemiological studies and one randomised placebo-controlled trial, the Women's Health Initiative (WHI), the overall risk of breast cancer increases with increasing duration of HRT use in current or recent HRT users.
For oestrogen-only HRT, estimates of relative risk (RR) from a reanalysis of original data from 51 epidemiological studies (in which >80% of HRT use was oestrogen-only HRT) and from the epidemiological Million Women Study (MWS) are similar at 1.35 (95% CI 1.21-1.49) and 1.30 (95% CI 1.21-1.40), respectively.
For oestrogen plus progestogen combined HRT, several epidemiological studies have reported an overall higher risk for breast cancer than with oestrogens alone.
The MWS reported that, compared to never users, the use of various types of oestrogen-progestogen combined HRT was associated with a higher risk of breast cancer (RR = 2.00, 95% CI: 1.88-2.12) than use of oestrogens alone (RR = 1.30, 95% CI: 1.21-1.40) or use of tibolone (RR = 1.45, 95% CI 1.25-1.68).
The WHI trial reported a risk estimate of 1.24 (95% CI 1.01-1.54) after 5.6 years of use of oestrogen-progestogen combined HRT (CEE + MPA) in all users compared with placebo.
The absolute risks calculated from the MWS and the WHI trial are presented below:
The MWS has estimated, from the known average incidence of breast cancer in developed countries, that:
• For women not using HRT, about 32 in every 1000 are expected to have breast cancer diagnosed between the ages of 50 and 64 years.
• For 1000 current or recent users of HRT, the number of additional cases during the corresponding period will be
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The WHI trial estimated that after 5.6 years of follow-up of women between the ages of 50 and 79 years, an additional 8 cases of invasive breast cancer would be due to oestrogen-progestogen combined HRT (CEE + MPA) per 10,000 women years. According to calculations from the trial data, it is estimated that:
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The number of additional cases of breast cancer in women who use HRT is broadly similar for women who start HRT irrespective of age at start of use (between the ages of 45-65) see section 4.4).
Endometrial cancer
In women with an intact uterus, the risk of endometrial hyperplasia and endometrial cancer increases with increasing duration of use of unopposed oestrogens. According to data from epidemiological studies, the best estimate of the risk is that for women not using HRT, about 5 in every 1000 are expected to have endometrial cancer diagnosed between the ages of 50 and 65. Depending on the duration of treatment and oestrogen dose, the reported increase in endometrial cancer risk among unopposed oestrogen users varies from 2- to 12-fold greater compared with non-users. Adding a progestogen to oestrogen-only therapy greatly reduces this increased risk.
Other adverse reactions have been reported in association with oestrogen/progestogen treatment:
- Oestrogen-dependent neoplasms benign and malignant, e.g. endometrial cancer.
- Venous thromboembolism, i.e. deep leg or pelvic venous thrombosis and pulmonary embolism, is more frequent among hormone replacement therapy users than among non-users. For further information, see section 4.3 Contraindications and 4.4 Special warnings and precautions for use.
- Myocardial infarction and stroke (see also section 4.4)
- Gall bladder disease.
- Skin and subcutaneous disorders: chloasma, erythema multiforme, erythema nodosum, vascular purpura.
- Probable dementia (see section 4.4).
4.9 Overdose
Overdosage is unlikely with this type of application. Nausea, vomiting and withdrawal bleeding may occur in some women. There is no specific antidote and treatment should be symptomatic. The patch(es) should be removed.
5. Pharmacological Properties
5.1 Pharmacodynamic Properties
Pharmacotherapeutic group: Natural and semisynthetic oestrogens, plain.
ATC code: G03CA03
Progynova TS contains synthetic 17ß-estradiol, which is chemically and biologically identical to endogenous human estradiol. It substitutes for the loss of oestrogen production in menopausal women, and alleviates menopausal symptoms. Oestrogens prevent bone loss following menopause or ovariectomy.
• Relief of oestrogen-deficiency symptoms
- Relief of menopausal symptoms was achieved during the first few weeks of treatment.
• Prevention of osteoporosis
- Oestrogen deficiency at menopause is associated with an increasing bone turnover and decline in bone mass. The effect of oestrogens on the bone mineral density is dose-dependent. However, in clinical trials, the efficacy of Progynova TS 100 was not significantly better than the efficacy of Progynova TS 50 for the prevention of postmenopausal osteoporosis. Protection appears to be effective for as long as treatment is continued. After discontinuation of HRT, bone mass is lost at a rate similar to that in untreated women.
- Evidence from the WHI trial and meta-analysed trials shows that current use of HRT alone or in combination with a progestogen – given to predominantly healthy women – reduces the risk of hip, vertebral, and other osteoporotic fractures. HRT may also prevent fractures in women with low bone density and/or established osteoporosis, but the evidence for that is limited.
5.2 Pharmacokinetic Properties
Absorption
After dermal application of Progynova TS, estradiol is continuously released and transported across intact skin leading to sustained circulating level of estradiol during 7-day treatment period as shown in figure 1. The systemic availability of estradiol after transdermal administration is about 20 times higher than that after oral administration. This difference is due to the absence of first pass metabolism when estradiol is given by the transdermal route. The major pharmacokinetic parameters of estradiol are summarized in the following table:
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Figure 1 : Mean baseline uncorrected serum 17 β-estradiol concentrations vs. time profile following application of Progynova TS 50 and Progynova TS 100
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Distribution
The distribution of exogenous oestrogens is similar to that of endogenous oestrogens. The apparent volume of distribution of estradiol after single intravenous administration is about 1 l/kg. Oestrogens circulate in the blood largely bound to serum proteins. About 61 % of estradiol is bound non-specifically to serum albumin and about 37 % specifically to sex hormone binding globulin (SHBG).
Metabolism
After transdermal administration, the biotransformation of estradiol leads to concentrations of estrone and of the respective conjugates within the range as seen during the early follicular phase in the reproductive life period, indicated by an estradiol/estrone serum level ratio of approximately 1. Unphysiologically high estrone levels as a result of the intensive "first pass" metabolism during oral estradiol hormone replacement therapy, reflected in estradiol/estrone ratios as low as 0.1, are avoided.
The biotransformation of the transdermally administered estradiol is the same as that of the endogenous hormone: Estradiol is mainly metabolized in the liver but also extrahepatically e.g. in gut, kidney, skeletal muscles and target organs. These processes involve the formation of estrone, estriol, catecholoestrogens and sulfate and glucuronide conjugates of these compounds, which are less oestrogenic or even nonoestrogenic.
Excretion
The total serum clearance of estradiol following single intravenous administration, shows high variability in the range of 10-30 ml/min/kg. Estradiol and its metabolites are excreted in the bile and undergo a so-called enterohepatic circulation. Ultimately estradiol and its metabolites are mainly excreted as sulfates and glucuronides with the urine.
Steady-state conditions
Accumulation of estradiol and estrone was not observed following multiple 1-week patch applications. Accordingly, steady-state serum levels of estradiol and estrone correspond to those observed after a single application.
5.3 Preclinical Safety Data
The toxicity profile of estradiol is well known. There are no preclinical data of relevance to the prescriber which are additional to that already included in other sections of the SPC.
In primary dermal irritation studies, application of Progynova TS patches resulted in mild irritation related to mechanical trauma at removal. Progynova TS patches had no dermal sensitising potential.
Studies on the components (adhesive matrix, backing and release liner) did not indicate any risk related to the use of the Progynova TS patch.
6. Pharmaceutical Particulars
6.1 List Of Excipients
Isooctyl acrylate/acrylamide/vinyl acetate copolymer, ethyl oleate, isopropyl myristate, glycerol monolaurate, mounted on a polyester release liner and protected with a polyethylene backing film.
6.2 Incompatibilities
Not applicable.
6.3 Shelf Life
3 years.
6.4 Special Precautions For Storage
Store below 30ºC.
Store in the original package in order to protect from moisture.
6.5 Nature And Contents Of Container
Each patch is sealed in a multilaminate pouch containing a desccant. The pouch consists of polyester/aluminium/acrylonitril, methyl acrylate copolymer (BAREX210).
The desiccant consists of sodium alumino silicate;
Pack of 4 or 12 patches.
(Not all pack sizes may be marketed).
6.6 Special Precautions For Disposal And Other Handling
After use the patch still contains substantial quantities of estradiol, which may have harmful effects if reaching the aquatic environment. Therefore, the used patch should be discarded carefully. Any used or unused patches should be folded in half, adhesive side together, and disposed of in the solid waste disposal system. Used patches should not be flushed down the toilet nor placed in the liquid waste disposal systems.
7. Marketing Authorisation Holder
Bayer plc
Bayer House
Strawberry Hill
Newbury
Berkshire RG14 1JA
United Kingdom
8. Marketing Authorisation Number(S)
PL 00010/0561
9. Date Of First Authorisation/Renewal Of The Authorisation
1 May 2008
10. Date Of Revision Of The Text
25 November 2011
LEGAL CATEGORY
POM
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