Provera Tablets 400mg
SUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Provera 400 mg Tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Each tablet contains 400 mg medroxyprogesterone acetate.
For the full list of excipients, see section 6.1.
3 PHARMACEUTICAL FORM
Tablet
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Progestogen indicated for the treatment of certain hormone dependent neoplasms, such as:
1. Endometrial carcinoma
2. Renal cell carcinoma
3. Carcinoma of the breast in post menopausal women.
4.2 Posology and method of administration
Posology
Adults
Endometrial and renal cell carcinoma 200 - 600 mg daily
Breast carcinoma 400 - 1500 mg daily
The incidence of minor side-effects, such as indigestion and weight gain, increases with the increase in dose.
Response to hormonal therapy may not be evident until after at least 8-10 weeks of therapy.
Elderly patients: This product has been used primarily in the older age group for the treatment of malignancies. There is no evidence to suggest that the older age group is any less prepared to handle the drug metabolically than is the younger patient. Therefore, the same dosage, contra-indications, and precautions would apply to either age group.
Paediatric population: The product is not anticipated for paediatric use in the indications recommended.
Method of administration For Oral use.
4.3 Contraindications
Medroxyprogesterone acetate is contraindicated in the following conditions:
• thrombophlebitis, thromboembolic disorders, and where there is a high risk of developing such manifestations [presence or history of atrial fibrillation, valvular disorders, endocarditis, heart failure, pulmonary embolism; thromboembolic ischaemic attack (TIA), cerebral infarction; atherosclerosis; immediate post surgery period]
• hypercalcaemia in patients with osseous metastases
• hypersensitivity to the active substance or to any of the excipients listed in section 6.1
• impaired liver function or active liver disease
• missed abortion, metrorrhagia, known or suspected pregnancy
• undiagnosed vaginal bleeding
• previous idiopathic or current venous thromboembolism (deep vein thrombosis, pulmonary embolism)
• active or recent arterial thromboembolic disease (e.g. angina, myocardial infarction)
• suspected or early breast carcinoma
Progestogens are known to be porphyrogenic. Patients with a history of attacks or aged under 30 are at greatest risk of an acute attack while on progesterone treatment.
A careful assessment of potential benefit should be made where this risk is present.
4.4 Special warnings and precautions for use
Warnings:
In the treatment of carcinoma of breast, occasional cases of hypercalcaemia have been reported.
Unexpected vaginal bleeding during therapy with medroxyprogesterone acetate should be investigated.
Medication should not be readministered pending examination if there is sudden, partial or complete loss of vision or if there is a sudden onset of proptosis, diplopia or migraine. If examination reveals papilloedema or retinal vascular lesions, medication should not be readministered.
Medroxyprogesterone acetate may produce Cushingoid symptoms.
Some patients receiving medroxyprogesterone acetate may exhibit suppressed adrenal function. Medroxyprogesterone acetate may decrease ACTH and hydrocortisone blood levels.
Treatment with medroxyprogesterone acetate should be discontinued in the event of:
• jaundice or deterioration in liver function
• significant increase in blood pressure
• new onset of migraine-type headache
Precautions:
Animal studies show that Provera possesses adrenocorticoid activity. This has also been reported in man, therefore patients receiving large doses continuously and for long periods should be observed closely for signs normally associated with adrenocorticoid therapy, such as hypertension, sodium retention, oedema, etc. Care is needed in treating patients with diabetes and/or arterial hypertension.
Before using Provera the general medical condition of the patient should be carefully evaluated.
This product should be used under the supervision of a specialist and the patient kept under regular surveillance.
Patients with the following conditions should be carefully monitored while taking progestogens:
• Conditions which may be influenced by potential fluid retention o Epilepsy
o Migraine o Asthma
o Cardiac dysfunction o Renal dysfunction
• History of mental depression
• Diabetes (a decrease in glucose tolerance has been observed in some patients).
• Hyperlipidaemia
The pathologist (laboratory) should be informed of the patient’s use of medroxyprogesterone acetate if endometrial or endocervical tissue is submitted for examination.
The physician/laboratory should be informed that medroxyprogesterone acetate may decrease the levels of the following endocrine biomarkers:
• Plasma/urinary steroids (e.g. cortisol, oestrogen, pregnanediol, progesterone, testosterone)
• Plasma/urinary gonadotrophins (e.g. LH and FSH)
• Sex-hormone-binding-globulin
The use of medroxyprogesterone acetate in oncology indications may also cause partial adrenal insufficiency (decrease in pituitary-adrenal axis response) during Metyrapone testing. Thus, the ability of adrenal cortex to respond to ACTH should be demonstrated before metyrapone is administered.
Although medroxyprogesterone acetate has not been causally associated with the induction of thromboembolic disorders, any patient with a history or who develops this kind of event while undergoing therapy with medroxyprogesterone acetate should have her status and need for treatment carefully assessed before continuing therapy.
Risk of venous thromboembolism (VTE)
The risk of VTE has not been assessed for progesterone alone. However, VTE is a known risk factor of oestrogen-only and combined hormone replacement therapy. When prescribing medroxyprogesterone acetate for oncology indications, the following precautions and risk factors should be considered in the light of the patient’s condition, the dose of medroxyprogesterone acetate and the duration of therapy:
• Generally, recognised risk factors for VTE include a personal or family history of VTE or known thromboembolic states, severe obesity (BMI > 30 kg/m ) and systemic lupus erythematosus
• The risk of VTE may be temporarily increased with prolonged immobilisation, major trauma or major surgery.
• If VTE develops after initiating therapy, medroxyprogesterone acetate should be discontinued. Patients should be told to contact their doctor immediately if they become aware of a symptom suggestive of potential thromboembolism (e.g. painful swelling of a leg, sudden pain in the chest, dyspnoea).
4.5 Interaction with other medicinal products and other forms of interaction
Interaction with other medicinal products
The metabolism of progestogens may be increased by concomitant administration of compounds known to induce drug-metabolising enzymes, specifically cytochrome P450 enzymes. These compounds include anticonvulsants (e.g. phenobarbital, phenytoin, carbamazepine) 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 progestogens. Progestogen levels may therefore be reduced.
Aminoglutethimide has been reported to decrease plasma levels of some progestogens.
Concurrent administration of ciclosporin and MPA has been reported to lead to increased plasma ciclosporin levels and/or decreased plasma MPA levels.
Interactions with oral anti-coagulants have been reported rarely, but causality has not been established.
When used in combination with cytotoxic drugs, it is possible that progestogens may reduce the haematological toxicity of chemotherapy.
Special care should be taken when progestogens are administered with other drugs which also cause fluid retention, such as NSAIDs and vasodilators.
Medroxyprogesterone acetate (MPA) is metabolized in-vitro primarily by hydroxylation via the CYP3A4. Specific drug-drug interaction studies evaluating the clinical effects with CYP3A4 inducers or inhibitors on MPA have not been conducted and therefore, the clinical effects of CYP3A4 inducers or inhibitors are unknown.
Other forms of interaction
Progestogens can influence certain laboratory tests (e.g. tests for hepatic function, thyroid function and coagulation).
4.6 Pregnancy and lactation
Pregnancy
Medroxyprogesterone acetate is contraindicated in women who are pregnant. If medroxyprogesterone acetate is used during pregnancy, or if the patient becomes pregnant while using this drug, the patient should be apprised of the potential hazard to the foetus.
Some reports suggest an association between intrauterine exposure to progestational drugs in the first trimester of pregnancy and genital abnormalities in male and female foetuses.
Infants from unintentional pregnancies that occur 1 to 2 months after injection of medroxyprogesterone acetate injectable suspension may be at an increased risk of low birth weight, which, in turn, is associated with an increased risk of neonatal death. The attributable risk is low because pregnancies while on medroxyprogesterone acetate are uncommon.
Breast-feeding
Medroxyprogesterone acetate and/or its metabolites are secreted in breast milk. Therefore, the use of Provera whilst breast-feeding is not recommended.
4.7 Effects on ability to drive and use machines
No adverse effect has been reported.
4.8 Undesirable effects
The table below provides a listing of adverse drug reactions with frequency based on all-causality data from 1337 patients who received MPA in 4 pivotal studies that evaluated efficacy and safety of MPA for oncology indications.
The following lists of adverse reactions are listed within the organ system classes, under headings of frequency (number of patients expected to experience the reaction), using the following categories:
Very common (>1/10)
Common (>1/100 to <1/10);
Uncommon (>1/1000 to <1/100);
Rare (>1/10,000 to <1/1000);
Very rare (<1/10,000);
Not known (cannot be estimated from the available data).
|
System Organ Class |
Very Common >1/10 |
Common > 1/100 to < 1/10 |
Uncommon > 1/1000 to < 1/100 |
Rare > 1/10,000 to < 1/1000 |
Very Rare < 1/10,000 |
Frequency Not Known (cannot be estimated from available data) |
|
Immune system disorders |
Angioedema |
Drug hypersensitivity |
Anaphylactic reaction, Anaphylactoid reaction | |||
|
Endocrine disorders |
Corticoid-like effects |
Prolonged anovulation | ||||
|
Metabolism and nutritional disorders |
Weight fluctuation, Increased appetite |
Diabetes mellitus exacerbated, Hypercalcaemia | ||||
|
Psychiatric disorders |
Insomnia |
Depression, Euphoria, Changes in libido |
Nervousness |
Confusion | ||
|
Nervous system disorders |
Headache, Dizziness, Tremors |
Cerebral infarction, Somnolence |
Loss of concentration, Adrenergic-like effects | |||
|
Eye disorders |
Retinal embolism and thrombosis, Cataract diabetic, Visual impairment | |||||
|
Cardiac disorders |
Cardiac failure congestive |
Myocardial infarction |
Tachycardia, Palpitations | |||
|
Vascular disorders |
Thrombophlebitis |
Embolism and thrombosis | ||||
|
Respiratory, thoracic and mediastinal disorders |
Pulmonary embolism | |||||
|
Gastrointestinal disorders |
Vomiting, Constipation, Nausea, |
Diarrhoea, Dry mouth | ||||
|
Hepatobiliary disorders |
Jaundice | |||||
|
Skin and subcutaneous tissue disorders |
Hyperhidrosis |
Acne, Hirsutism |
Alopecia, Rash |
Urticaria, Pruritus | ||
|
Musculoskeletal and connective tissue disorders |
Muscle spasms | |||||
|
Renal and urinary system disorders |
Glycosuria | |||||
|
Reproductive system and breast disorders |
Erectile dysfunction |
Dysfunctional uterine bleeding (irregular, increase, decrease, spotting), Breast pain |
Amenorrhoea, Uterine cervical erosions, Cervical discharge, Galactorrhoea | |||
|
General disorders and administration site conditions |
Injection site reaction, Oedema /fluid retention, Fatigue |
Malaise, Pyrexia | ||||
|
Investigations |
Glucose tolerance decreased, Blood pressure increased |
Liver function test abnormal, White blood cell count increased, Platelet count increased |
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal
product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at www.mhra.gov.uk/yellowcard.
4.9 Overdose
No action required other than cessation of therapy.
5 PHARMACOLOGICAL PROPERTIES
5.1 Pharmacodynamic properties
Pharmacotherapeutic group: Progestogens. ATC Code: L02AB02
Medroxyprogesterone acetate has the pharmacological action of a progestogen.
5.2 Pharmacokinetic properties
Medroxyprogesterone acetate is absorbed from the gastro intestinal tract with a single oral dose of 10-250 mg. The time taken to reach the peak serum concentration (Tmax) was 2-6 hours and the average peak serum concentration (Cmax) was 13-46.89 mg/ml.
Unmetabolised medroxyprogesterone acetate is highly plasma protein bound. Medroxyprogesterone acetate is metabolised in the liver.
Medroxyprogesterone acetate is primarily metabolised by faecal excretion as glucuronide conjugated metabolite.
Metabolised medroxyprogesterone acetate is excreted more rapidly and in a greater percentage following oral doses than after aqueous intramuscular injection
The comparative bioavailability of medroxyprogesterone acetate (MPA) in sixteen healthy male volunteers was determined following the oral ingestion of 400 mg MPA as two Provera 200 mg tablets or as one Provera 400mg tablet.
It is concluded that the bioavailability appeared to be equivalent in this group of volunteers.
5.3 Preclinical safety data
No further preclinical safety data available.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Microcrystalline cellulose Maize starch Byco C Macrogol 400 Sodium starch glycollate Docusate sodium Sodium benzoate Magnesium stearate Isopropyl alcohol Purified water
6.2 Incompatibilities
Not applicable.
6.3 Shelf life
3 years
6.4 Special precautions for storage
Store at controlled room temperature (15 to 30oC. Bottle packs only: keep in a well closed container.
6.5 Nature and contents of container
Glass/HDPE bottles of 60 tablets. PVC aluminium blisters of 30 tablets Not all pack sizes may be marketed
6.6 Special precautions for disposal
No special requirements.
7 MARKETING AUTHORISATION HOLDER
Pfizer Limited Ramsgate Road Sandwich Kent CT13 9NJ United Kingdom
8 MARKETING AUTHORISATION NUMBER(S)
PL 00057/1036
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE
AUTHORISATION
29th April 1986 / 21st May 1998.
10 DATE OF REVISION OF THE TEXT
10/10/2016