SAYANA PRESS 104 mg/0.65 ml suspension for injection

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1. Name of the medicinal product

SAYANA PRESS 104 mg/0.65 ml suspension for injection.

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2. Qualitative and quantitative composition

SAYANA PRESS single-dose container with 104 mg medroxyprogesterone acetate (MPA) in 0.65 mL suspension for injection.

Excipients with known effect:

Methyl parahydroxybenzoate – 1.04 mg per 0.65 ml

Propyl parahydroxybenzoate – 0.0975 mg per 0.65 ml

Sodium – 2.47 mg per 0.65 ml

For the full list of excipients, see section 6.1

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3. Pharmaceutical form

Suspension for injection

White to off-white homogeneous suspension

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4. Clinical particulars
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4.1 Therapeutic indications

SAYANA PRESS is indicated for long-term female contraception. Each subcutaneous injection prevents ovulation and provides contraception for at least 13 weeks (+/- 1 week). However, it should be taken into consideration that the return to fertility (ovulation) may be delayed for up to one year (see section 4.4).

Since loss of bone mineral density (BMD) may occur in females of all ages who use SAYANA PRESS long-term (see section 4.4 Special Warnings and Precautions for Use), a risk/benefit assessment, which also takes into consideration the decrease in BMD that occurs during pregnancy and/or lactation, should be considered.

Use in Adolescents (12-18 years)

In adolescents, use of SAYANA PRESS is only indicated when other contraceptive methods are considered unsuitable or unacceptable, due to unknown long-term effects of bone loss associated with SAYANA PRESS during the critical period of bone accretion (see section 4.4).

SAYANA PRESS has not been studied in women under the age of 18 years but data is available for intramuscular MPA in this population.

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4.2 Posology and method of administration

The SAYANA PRESS single-dose container should be vigorously shaken just before use to ensure that the dose being given represents a uniform suspension. The contents are completely sealed inside the reservoir of the injector. The injector must be activated before use. The activation process pierces an internal seal so that the medicine can come out through the needle when the reservoir is squeezed. The liquid does not completely fill the reservoir. There is a small bubble of air above the liquid. When the injection is being given, the injector must be used with the needle downwards. This ensures that the full dose of liquid is delivered out through the needle. The medication should be injected slowly for about 5-7 seconds. The treatment should be initiated by a doctor or healthcare assistant and administered as a subcutaneous injection (SC) into the anterior thigh or abdomen.

Adults

First Injection: To provide contraceptive cover in the first cycle of use, an injection of 104 mg SC should be given during the first five days of a normal menstrual cycle. If the injection is carried out according to these instructions, no additional contraceptive measure is required.

Further doses: The second and subsequent injections should be given at 13 week intervals, as long as the injection is given no later than seven days after this time, no additional contraceptive measures (e.g. barrier) are required. If the interval from the preceding injection is greater than 14 weeks (13 weeks plus 7 days) for any reason, then pregnancy should be excluded before the next injection is given. The efficacy of SAYANA PRESS depends on adherence to the recommended dosage schedule of administration.

Post Partum: If the patient is not breast-feeding, the injection should be given within 5 days post partum (to increase assurance that the patient is not pregnant). If the injection is to be given at another time then the pregnancy should be excluded.

If the patient is breast-feeding, the injection should be given no sooner than six weeks post partum, when the infant's enzyme system is more developed (see section 4.6).

There is evidence that women prescribed SAYANA PRESS in the immediate puerperium can experience prolonged and heavy bleeding. Because of this, the drug should be used with caution in the puerperium. Women who are considering use of the product immediately following delivery or termination should be advised that the risk of heavy or prolonged bleeding may be increased. Doctors are reminded that in the non breast-feeding, post partum patient, ovulation may occur as early as week 4.

Switching from other Methods of Contraception: When switching from other contraception methods, SAYANA PRESS should be given in a manner that ensures continuous contraceptive coverage based upon the mechanism of action of both methods, (e.g. patients switching from oral contraceptives should have their first injection of SAYANA PRESS within 7 days after their last active pill).

Patients with hepatic impairment: The effect of hepatic disease on the pharmacokinetics of SAYANA PRESS is unknown. As SAYANA PRESS largely undergoes hepatic elimination it may be poorly metabolised in patients with severe hepatic insufficiency (see Section 4.3 Contraindications).

Patients with renal impairment: The effect of renal disease on the pharmacokinetics of SAYANA PRESS is unknown. No dosage adjustment should be necessary in women with renal insufficiency, since SAYANA PRESS is almost exclusively eliminated by hepatic metabolism.

Paediatric population

SAYANA PRESS is not indicated before menarche (see Section 4.1 Therapeutic Indications). Data in adolescent females (12-18 years) is available for IM administration of MPA (see Section 4.4 Special Warnings and Precautions for Use and Section 5.1 Pharmacodynamic properties). Other than concerns about loss of BMD, the safety and effectiveness of SAYANA PRESS is expected to be the same for adolescents after menarche and adult females.

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4.3 Contraindications

• SAYANA PRESS is contra-indicated in patients with a known hypersensitivity to MPA or any of its excipients listed in section 6.1.

• SAYANA PRESS is contra-indicated if pregnancy is known or suspected.

• SAYANA PRESS is contra-indicated in women with known or suspected malignancy of the breast or genital organs.

• SAYANA PRESS is contra-indicated in patients with undiagnosed vaginal bleeding.

• SAYANA PRESS is contra-indicated in patients with severe hepatic impairment.

• SAYANA PRESS is contra-indicated in patients with metabolic bone disease.

• SAYANA PRESS is contra-indicated in patients with active thromboembolic disease and in patients with current or past history of cerebrovascular disease.

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4.4 Special warnings and precautions for use

Warnings:

Loss of Bone Mineral Density:

Use of depot MPA subcutaneous injection reduces serum estrogen levels and is associated with significant loss of BMD due to the known effect of estrogen deficiency on the bone remodelling system. Bone loss is greater with increasing duration of use, however BMD appears to increase after DMPA subcutaneous injection is discontinued and ovarian estrogen production increases.

This loss of BMD is of particular concern during adolescence and early adulthood, a critical period of bone accretion. It is unknown if use of DMPA subcutaneous injection by younger women will reduce peak bone mass and increase the risk for fracture in later life.

A study to assess the BMD effects of medroxyprogesterone acetate IM (Depo-Provera, DMPA) in adolescent females showed that its use was associated with a significant decline in BMD from baseline. In the small number of women who were followed-up, mean BMD recovered to around baseline values by 1- 3 years after discontinuing treatment. In adolescents, SAYANA PRESS may be used, but only after other methods of contraception have been discussed with the patients and considered to be unsuitable or unacceptable.

In women of all ages, careful re-evaluation of the risks and benefits of treatment should be carried out in those who wish to continue use for more than 2 years. In particular, in women with significant lifestyle and/or medical risk factors for osteoporosis, other methods of contraception should be considered prior to use of SAYANA PRESS.

Significant risk factors for osteoporosis include:

• Alcohol abuse and/or tobacco use

• Chronic use of drugs that can reduce bone mass, e.g., anticonvulsants or corticosteroids

• Low body mass index or eating disorder, e.g., anorexia nervosa or bulimia

• Previous low trauma fracture

• Family history of osteoporosis

A retrospective cohort study using data from the General Practice Research Database (GPRD) reported that women using MPA injections (DMPA), have a higher risk of fracture compared with contraceptive users with no recorded use of DMPA (incident rate ratio 1.41, 95% CI 1.35-1.47 for the five year follow-up period); it is not known if this is due to DMPA, or to other related lifestyle factors which have a bearing on fracture rate. By contrast, in women using DMPA, the fracture risk before and after starting DMPA was not increased (relative risk 1.08, 95% CI 0.92-1.26). Importantly, this study could not determine whether use of DMPA has an effect on fracture rate later in life.

For further information on BMD changes in both adult and adolescent females, as reported in recent clinical studies, refer to section 5.1 (Pharmacodynamic Properties). Adequate intake of calcium and Vitamin D, whether from the diet or from supplements, is important for bone health in women of all ages.

Menstrual Irregularities:

Most women using DMPA subcutaneous injection experienced alteration of menstrual bleeding patterns. Patients should be appropriately counseled concerning the likelihood of menstrual disturbance and the potential delay in return to ovulation. As women continued using DMPA subcutaneous injection, fewer experienced irregular bleeding and more experienced amenorrhea. After receiving the fourth dose, 39% of women experienced amenorrhea during month 6. During month twelve, 56.5% of women experienced amenorrhea. The changes in menstrual patterns from the three contraception trials are presented in Figures 1 and 2. Figure 1 shows the increase in the percentage of women experiencing amenorrhea over the 12 month study. Figure 2 presents the percentage of women experiencing spotting only, bleeding only, and bleeding and spotting over the same time period. In addition to amenorrhea, altered bleeding patterns included intermenstrual bleeding, menorrhagia and metrorrhagia. If abnormal bleeding associated with DMPA subcutaneous injection persists or is severe, appropriate investigation and treatment should be instituted.

Figure 1. Percent of DMPA subcutaneous injection -Treated Women with Amenorrhea per 30-Day Month Contraception Studies (ITT Population, N=2053)

Figure 2. Percent of DMPA subcutaneous injection -Treated Women with Bleeding and/or Spotting per 30-Day Month Contraception Studies (ITT Population, N=2053)

Cancer Risks:

Long-term case-controlled surveillance of DMPA-IM 150 mg users found no overall increased risk of ovarian, liver, or cervical cancer and a prolonged, protective effect of reducing the risk of endometrial cancer in the population of users.

Breast cancer is rare among women under 40 years of age whether or not they use hormonal contraceptives.

Results from some epidemiological studies suggest a small difference in the risk of having the disease in current and recent users compared with never-users. Any excess risk in current and recent DMPA users is small in relation to the overall risk of breast cancer, particularly in young women (see below), and is not apparent after 10 years since last use. Duration of use does not seem to be important.

Possible number of additional cases of breast cancer diagnosed up to 10 years after stopping injectable progestogens*

Age at last use of DMPA

No of cases per 10,000 women who are never-users

Possible additional cases per 10,000 DMPA users

20

Less than 1

Much less than 1

30

44

2-3

40

160

10

*based on use for 5 years”

Thromboembolic Disorders

Although MPA has not been causally associated with the induction of thrombotic or thromboembolic disorders, any patient who develops such an event, e.g. pulmonary embolism, cerebrovascular disease or retinal thrombosis or deep venous thrombosis, while undergoing therapy with SAYANA PRESS should not be readministered the drug. Women with a prior history of thromboembolic disorders have not been studied in clinical trials and no information is available that would support the safety of SAYANA PRESS use in this population.

Anaphylaxis and Anaphylactoid Reaction

If an anaphylactic reaction occurs appropriate therapy should be instituted. Serious anaphylactic reactions require emergency medical treatment.

Ocular Disorders

Medication should not be re-administered pending examination if there is a sudden partial or complete loss of vision or if there is a sudden onset of proptosis, diplopia, or migraine. If examination reveals papilledema or retinal vascular lesions, medication should not be re-administered.

Precautions

Weight Changes

Weight changes are common but unpredictable. In the phase 3 studies body weight was followed over 12 months. Half (50%) of women remained within 2.2 Kg of their initial body weight. 12% of women lost more than 2.2 Kg, and 38% of women gained more than 2.3 Kg.

Fluid Retention

There is evidence that progestogens may cause some degree of fluid retention, and as a result, caution should be exercised in treating any patient with a pre-existing medical condition that might be adversely affected by fluid retention.

Return of Ovulation

Following a single dose of DMPA subcutaneous injection, the cumulative rate of return to ovulation as measured by plasma progesterone was 97.4% (38/39 patients) by one year after administration. After the 14-week therapeutic window, the earliest return to ovulation was one week, and the median time to ovulation was 30 weeks. Women should be counseled that there is a potential for delay in return to ovulation following use of the method, regardless of the duration of use. It is recognised, however, that amenorrhoea and/or irregular menstruation upon discontinuation of hormonal contraception may be due to an underlying disorder associated with menstrual irregularity especially polycystic ovarian syndrome.

Psychiatric Disorders

Patients with a history of treatment for clinical depression should be carefully monitored while receiving SAYANA PRESS.

Protection Against Sexually Transmitted Diseases

Patients should be counselled that SAYANA PRESS does not protect against HIV infection (AIDS) or other sexually transmitted diseases.

Carbohydrate/Metabolism

Some patients receiving progestogens may exhibit a decrease in glucose tolerance. Diabetic patients should be carefully observed while receiving such therapy.

Liver Function

If jaundice develops in any woman receiving SAYANA PRESS, consideration should be given to not re-administer the medication. (See section 4.3)

Hypertension and Lipid disorders

Limited evidence suggests that there is a small increased risk of cardiovascular events among women with hypertension or with lipid disorders who used progestogen-only injectables. If hypertension occurs under SAYANA PRESS treatment and/or the increase in hypertension cannot adequately be controlled by antihypertensive medication, treatment with SAYANA PRESS should be stopped. Additional risk factors for arterial thrombotic disorders include: Hypertension, smoking, age, lipid disorders, migraine, obesity, positive family history, cardiac valve disorders, atrial fibrillation.

SAYANA PRESS should be used cautiously in patients with one or more of these risk factors.

Other conditions

The following conditions have been reported both during pregnancy and during sex steroid use, but an association with the use of progestagens has not been established: jaundice and/or pruritus related to cholestasis; gallstone formation; porphyria; systemic lupus erythematosus; hemolytic uraemic syndrome; Sydenham's chorea; herpes gestationis; otosclerosis-related hearing loss.

Laboratory Tests

The pathologist should be advised of progestogen therapy when relevant specimens are submitted. The physician should be informed that certain endocrine and liver function tests, and blood components might be affected by progestogen therapy:

a) Plasma/urinary steroids are decreased (e.g. progesterone, estradiol, pregnanediol, testosterone, cortisol)

b) Plasma and urinary gonadotropin levels are decreased (e.g., LH, FSH).

c) Sex-hormone-binding-globulin (SHBG) concentrations are decreased.

Excipients

As this product contains methylparahydroxbenzoate and propylparahydroxbenzoate, it may cause allergic reactions (possibly delayed), and exceptionally, bronchospasm. This medicinal product contains less than 1 mmol sodium (23 mg) per 104 mg/0.65 ml, i.e. essentially 'sodium-free'.

If any of the conditions/risk factors mentioned is present, the benefits of SAYANA PRESS use should be weighed against the possible risks for each individual woman and discussed with the woman before she decides to start using it. In the event of aggravation, exacerbation or first appearance of any of these conditions or risk factors, the woman should contact her physician. The physician should then decide on whether SAYANA PRESS use should be discontinued.

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4.5 Interaction with other medicinal products and other forms of interaction

No interaction studies have been performed with SAYANA PRESS.

Interactions with other medical treatments (including oral anticoagulants) have rarely been reported, but causality has not been determined. The possibility of interactions should be borne in mind in patients receiving concurrent treatment with other drugs.

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.

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4.6 Fertility, pregnancy and lactation

Fertility

SAYANA PRESS is indicated for the prevention of pregnancy.

Women may experience a delay in return to fertility (conception) following discontinuation of SAYANA PRESS (see section 4.4).

Pregnancy

SAYANA PRESS is contraindicated in women who are pregnant. Some reports suggest an association between intrauterine exposure to progestational drugs in the first trimester of pregnancy and genital abnormalities in male and female fetuses. If SAYANA PRESS is used during pregnancy, or if the patient becomes pregnant while using this drug, the patient should be warned of the potential hazard to the fetus.

One study found that infants from unintentional pregnancies that occurred 1 to 2 months after injection of medroxyprogesterone acetate Injection 150 mg IM were at an increased risk of low birth weight; this, in turn, has been associated with an increased risk of neonatal death. However, the overall risk of this is very low because pregnancies while on medroxyprogesterone acetate Injection 150 mg IM are uncommon.

Children exposed to MPA in utero and followed to adolescence showed no evidence of any adverse effects on their health including their physical, intellectual, sexual or social development.

Lactation

Low detectable amounts of drug have been identified in the milk of mothers receiving MPA. In nursing mothers treated with medroxyprogesterone acetate injection 150 mg IM, milk composition, quality, and amount are not adversely affected. Neonates and infants exposed to MPA from breast milk have been studied for developmental and behavioural effects through puberty. No adverse effects have been noted. However, due to limitations of the data regarding the effects of MPA in breastfed infants less than six weeks old, SAYANA PRESS should be given no sooner than six weeks post partum when the infant's enzyme system is more developed.

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4.7 Effects on ability to drive and use machines

SAYANA PRESS has no influence on the ability to drive and use machines.

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4.8 Undesirable effects

Events from clinical trials:

In three large clinical trials involving 1980 women who were treated with DMPA subcutaneous injection for up to 1 year, the following adverse events were reported as drug related. Adverse reactions are listed according to the following categories. These are as follows:

Very Common (≥1/10)

Common (≥1/100 to <1/10)

Uncommon (≥1/1000 to <1/100)

Rare (≥1/10000 to <1/1000)

Frequency not known (cannot be estimated from the available data)

Events from post-marketing surveillance:

In addition, adverse events of medical significance obtained from post-marketing data with the use of injectable DMPA (IM or SC) are also included in the list below:

System organ class

Very Common

Common

Uncommon

Rare

Not known

Infections and infestations

 

Vaginitis

     

Neoplasms benign, malignant and unspecified (including cysts and polyps)

     

Breast cancer (see Section 4.4)

 

Immune system disorders

       

Hypersensitivity reactions (e.g. anaphylaxis & anaphylactoid reactions, angioedema (see Section 4.4)

Metabolism and nutrition disorders

Weight increase, weight decrease (see Section 4.4)

 

Fluid retention (see Section 4.4), increased appetite, decreased appetite

 

 

Pyschiatric disorders

 

Depression anorgasmia, anxiety, emotional disorder, affective disorder, libido decreased, irritability

Insomnia, nervousness

 

 

Nervous system disorders

 

Dizziness, headache

Migraine, somnolence

 

Convulsions

Ear and labyrinth disorders

   

Vertigo

   

Cardiac disorders

   

Tachycardia

   

Vascular disorders

   

Pulmonary embolus, thrombophlebitis, hypertension (see Section 4.4), varicose vein, hot flush

 

Thromboembolic disorders (see Section 4.4)

Gastrointestinal disorders

 

Abdominal pain, nausea

Abdominal distension

   

Hepatobiliary disorders

   

Hepatic enzyme abnormal

 

Jaundice, disturbed liver function (see Section 4.4)

Skin and subcutaneous tissue disorders

 

Acne

Chloasma, dermatitis, ecchymosis, rash, alopecia, hirsutism, pruritus, urticaria

 

Skin striae

Musculoskeletal and connective tissue disorders

 

Back pain, pain in limbs

Loss of bone mineral density (see Section 4.4),arthralgia, muscle cramps

 

Osteoporosis including osteoporotic fractures

Reproductive System & Breast Disorders

 

Amenorrhoea, breast pain/tenderness, dysmenorrhoea, metrorrhagia menometrorrhagia, menorrhagia (see Section 4.4)

Ovarian cyst, uterine haemorrhage (irregular, increase, decrease)vaginal discharge, vulvovaginal dryness, breast enlargement, dyspareunia, galactorrhoea, pelvic pain, premenstrual syndrome

 

 

General disorders and administration site conditions

 

Injection site reactions,* fatigue

Asthenia

Pyrexia

 

Investigations

 

Cervical smear abnormal

Decreased glucose tolerance (see Section 4.4)

 

 

*Injection site reactions such as injection site pain, injection site tenderness, injection site nodule, injection site atrophy (persistent) and lipoatrophy injection site have been reported with Sayana® 104 mg/0.65 mL suspension for injection (pre-filled syringe).

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 Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard

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4.9 Overdose

No positive action is required other than cessation of therapy.

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5. Pharmacological properties
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5.1 Pharmacodynamic properties

ATC Code: G03AC06

MPA is an analogue of 17 α-hydroxyprogesterone with anti-estrogenic, anti-androgenic and antigonadotrophic effects.

DMPA subcutaneous injection inhibits the secretion of gonadotropins which, in turn, prevents follicular maturation and ovulation. The primary mechanism of ovulation suppression also results in endometrial thinning, and these actions produce its contraceptive effect.

BMD Changes in Adult Women

A study comparing changes in BMD in women using DMPA subcutaneous injection with women using medroxyprogesterone acetate injection (150 mg IM) showed no significant differences in BMD loss between the two groups after two years of treatment. Mean percent changes in BMD in the DMPA subcutaneous injection group are listed in Table 1.

Table 1. Mean Percent Change from Baseline in BMD in Women Using DMPA subcutaneous injection by Skeletal Site

Time on Treatment

Lumbar Spine

Total Hip

Femoral Neck

N

Mean % Change

(95% CI)

N

Mean % Change

(95% CI)

N

Mean % Change

(95% CI)

1 year

166

-2.7

(-3.1 to -2.3)

166

-1.7

(-2.1 to -1.3)

166

-1.9

(-2.5 to -1.4)

2 year

106

- 4.1

(-4.6 to -3.5)

106

-3.5

(-4.2 to -2.7)

106

-3.5

(-4.3 to -2.6)

In another controlled, clinical study adult women using medroxyprogesterone acetate injection (150 mg IM) for up to 5 years showed spine and hip mean BMD decreases of 5-6%, compared to no significant change in BMD in the control group. The decline in BMD was more pronounced during the first two years of use, with smaller declines in subsequent years. Mean changes in lumbar spine BMD of –2.86%, -4.11%, -4.89%, -4.93% and –5.38% after 1, 2, 3, 4 and 5 years, respectively, were observed. Mean decreases in BMD of the total hip and femoral neck were similar. Please refer to Table 2 below for further details.

After stopping use of medroxyprogesterone acetate injection (150 mg IM), BMD increased towards baseline values during the post-therapy period. A longer duration of treatment was associated with a slower rate of BMD recovery.

Table 2. Mean Percent Change from Baseline in BMD in Adults by Skeletal Site and Cohort after 5 Years of Therapy with Medroxyprogesterone acetate 150 mg IM and after 2 Years Post-Therapy or 7 Years of Observation (Control)

Time in Study

Spine

Total Hip

Femoral Neck

 

Medroxyprogesterone acetate

Control

Medroxyprogesterone acetate

Control

Medroxyprogesterone acetate

Control

5 years*

n=33

-5.38%

n=105

0.43%

n=21

-5.16%

n=65

0.19%

n=34

-6.12%

n=106

-0.27%

7 years**

n=12

-3.13%

n=60

0.53%

n=7

-1.34%

n=39

0.94%

n=13

-5.38%

n=63

-0.11%

*The treatment group consisted of women who received medroxyprogesterone acetate injection (150 mg IM) for 5 years and the control group consisted of women who did not use hormonal contraception for this time period.

** The treatment group consisted of women who received medroxyprogesterone acetate Injection (150 mg IM) for 5 years and were then followed up for 2 years post-use and the control group consisted of women who did not use hormonal contraceptive for 7 years.

BMD Changes in Adolescent Females (12-18 years)

Results from an open-label, non-randomised, clinical study of medroxyprogesterone acetate Injection (150 mg IM every 12 weeks for up to 240 weeks (4.6 years), followed by post–treatment measurements) in adolescent females (12-18 years) also showed that medroxyprogesterone acetate IM use was associated with a significant decline in BMD from baseline. Among subjects who received ≥ 4 injections/60-week period, the mean decrease in lumbar spine BMD was - 2.1 % after 240 weeks (4.6 years); mean decreases for the total hip and femoral neck were -6.4 % and -5.4 %, respectively. Post-treatment follow-up showed that, based on mean values, lumbar spine BMD recovered to baseline levels approximately 1 year after treatment was discontinued and that hip BMD recovered to baseline levels approximately 3 years after treatment was discontinued. However, it is important to note that a large number of subjects discontinued from the study, therefore these results are based on a small number of subjects (n=71 at 60 weeks and n=25 at 240 weeks after treatment discontinuation). In contrast, a non-comparable cohort of unmatched, untreated subjects, with different baseline bone parameters from the DMPA users, showed mean BMD increases at 240 weeks of 6.4%, 1.7% and 1.9% for lumbar spine, total hip and femoral neck, respectively.

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5.2 Pharmacokinetic properties

The pharmacokinetic parameters of MPA following a single SC injection of DMPA are shown in Table 1.

Table 1. Pharmacokinetic Parameters of MPA

After a Single SC Injection of DMPA in Healthy Women (n = 42)

 

Cmax

(ng/mL)

Tmax

(day)

C91 (min)

(ng/mL)

AUC0-91

(ng·day/mL)

AUC0- ∞

(ng·day/mL)

(day)

Mean

1.56

8.8

0.402

66.98

92.84

43

Min

0.53

2.0

0.133

20.63

31.36

16

Max

3.08

80.0

0.733

139.79

162.29

114

Cmax = peak serum concentration; Tmax = time when Cmax is observed; AUC0-91 = area under the concentration-time curve over 91 days; t½ = terminal half-life; 1 nanogram = 103 picogram.

General Characteristics

Absorption

MPA absorption from the SC injection site to achieve therapeutic levels is relatively prompt. The mean Tmax attained approximately one week after injection. The peak MPA concentrations (Cmax) generally range from 0.5 to 3.0 ng/mL with a mean Cmax of 1.5 ng/mL after a single SC injection.

Effect of Injection Site

DMPA was administered subcutaneously into the anterior thigh or the abdomen to evaluate effects on MPA concentration-time profile. MPA trough concentrations (Cmin; Day 91) were similar for the two injection locations, suggesting that injection site does not negatively affect the contraceptive efficacy.

Distribution

Plasma protein binding of MPA averages 86%. MPA binding occurs primarily to serum albumin; no binding of MPA occurs with SHBG.

Biotransformation

MPA is extensively metabolized in the liver by P450 enzymes. Its metabolism primarily involves ring A and/or side-chain reduction, loss of the acetyl group, hydroxylation in the 2-, 6-, and 21-positions or a combination of these positions, resulting in more than 10 metabolites.

Elimination

Residual MPA concentrations at the end of the dosing interval (3 months) of DMPA subcutaneous injection are generally below 0.5 ng/mL, consistent with its apparent terminal half-life of ~40 days after SC administration. Most MPA metabolites are excreted in the urine as glucuronide conjugates with only small amounts excreted as sulfates.

Linearity/non-linearity

Based on single-dose data, there was no evidence of non-linearity over the dose range of 50 to 150 mg after SC administration. The relationship between the AUC or the Cmin and the SC dose of MPA appeared to be linear. The mean Cmax did not change substantially with increasing dose

Special populations

Race

There were no apparent differences in the pharmacokinetics and/or dynamics of MPA after SC administration of DMPA among women of all ethnic backgrounds studied. The pharmacokinetics/dynamics of MPA has been evaluated in Asian women in a separate study.

Effect of Body Weight

No dosage adjustment of SAYANA PRESS is necessary based on body weight. The effect of body weight on the pharmacokinetics of MPA was assessed in a subset of women (n = 42, body mass index [BMI] ranged from 18.2 to 46.0 kg/m2). The AUC0-91 values for MPA were 68.5, 74.8, and 61.8 ng -day/mL in women with BMI categories of ≤ 25 kg/m2, >25 to ≤30 kg/m2, and >30 kg/m2, respectively. The mean MPA Cmax was 1.65 ng/mL in women with BMI ≤ 25 kg/m2, 1.76 ng/mL in women with BMI >25 to ≤30 kg/m2, and 1.40 ng/mL in women with BMI > 30 kg/m2, respectively. The range of MPA trough (Cmin) concentrations and the half-lives were comparable for the 3 BMI groups.

Pharmacokinetic/Pharmacodynamic Relationship(s)

From a pharmacodynamic perspective, the duration of ovulation suppression depends upon maintaining therapeutic MPA concentrations throughout the 13 week dosing interval.

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5.3 Preclinical safety data

Non-clinical data reveal no special hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity, genotoxicity and carcinogenic potential. Medroxyprogestrone acetate has been shown to have adverse effects on reproduction in animals and is contraindicated for use during pregnancy.

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6. Pharmaceutical particulars
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6.1 List of excipients

Macrogol 3350

Methyl parahydroxybenzoate (E 218)

Propyl parahydroxybenzoate (E 216)

Sodium Chloride

Polysorbate 80

Monobasic Sodium Phosphate Monohydrate

Disodium Phosphate Dodecahydrate

Methionine

Povidone

Hydrochloric Acid and/or Sodium Hydroxide for pH adjustment

Water for Injection

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6.2 Incompatibilities

Not applicable

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6.3 Shelf life

Unopened: 5 years

Once opened: use immediately, discard any unused portion

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6.4 Special precautions for storage

Do not refrigerate or freeze

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6.5 Nature and contents of container

SAYANA PRESS suspension for injection is supplied in a single-dose container in the form of a pre-filled injector containing 0.65 ml. The injector comprises a linear low density polyethylene laminate reservoir with a siliconized AISI Type 304 Stainless Steel 23 gauge ultra thin wall needle attached via a low density polyethylene port and valve. The pack size is one single-dose container.

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6.6 Special precautions for disposal and other handling

For single use only.

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

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7. Marketing authorisation holder

Pfizer Limited

Sandwich

Kent

CT13 9NJ

United Kingdom

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8. Marketing authorisation number(s)

PL 00057/1093

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9. Date of first authorisation/renewal of the authorisation

21/06/2011

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10. Date of revision of the text

08/2014

SNb5_1

Company information
Pfizer Limited
Ramsgate Road, Sandwich, Kent, CT13 9NJ
Telephone : +44 (0)1304 616 161
Fax : +44 (0)1304 656 221
More information about this medicine
Legal categories
  • POM
Active ingredients/generics
  • medroxyprogesterone acetate
Patient Information Leaflets (PILs):
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