Consumer medicine information

Intrarosa

Prasterone

BRAND INFORMATION

Brand name

Intrarosa

Active ingredient

Prasterone

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Intrarosa.

SUMMARY CMI

INTRAROSA®

Consumer Medicine Information (CMI) summary

The full CMI on the next page has more details. If you are worried about using this medicine, speak to your doctor or pharmacist.

 This medicine is new or being used differently. Please report side effects. See the full CMI for further details.

1. Why am I using Intrarosa?

Intrarosa contains the active ingredient prasterone. Intrarosa is used to treat vulvar and vaginal atrophy in postmenopausal women with moderate to severe symptoms.

For more information, see Section 1. Why am I using Intrarosa? in the full CMI.

2. What should I know before I use Intrarosa?

Do not use if you have ever had an allergic reaction to Intrarosa or any of the ingredients listed at the end of the CMI or if you have or have had any of the conditions listed in Section 2. What should I know before I use Intrarosa?.

Talk to your doctor before you use Intrarosa if you have any other medical conditions, take any other medicines, or are pregnant or plan to become pregnant or are breastfeeding.

For more information, see Section 2. What should I know before I use Intrarosa? in the full CMI.

3. What if I am taking other medicines?

Some medicines may interfere with Intrarosa and affect how it works.

A list of these medicines is in Section 3. What if I am taking other medicines? in the full CMI.

4. How do I use Intrarosa?

  • One pessary once a day at bedtime.
  • You place it in your vagina with the provided applicator, or with your fingers. Do not use any other applicator.

More instructions can be found in Section 4. How do I use Intrarosa? in the full CMI.

5. What should I know while using Intrarosa?

Things you should do
  • Remind any doctor, dentist, or pharmacist you visit that you are using Intrarosa.
  • Go for regular Pap tests, gynaecological and breast exams. Do this as per your healthcare professional's directions.
  • If you become pregnant, stop taking Intrarosa. Talk with your healthcare professional.
Things you should not do
  • Do not stop using this medicine without telling your doctor.
  • Do not change the dose unless your doctor tells you to.
  • Do not use this medicine if you have vaginal bleeding that has not been diagnosed.
  • Do not use this medicine if you still have periods. This drug is for postmenopausal women only.
Driving or using machines
  • No effects on ability to drive and use machines have been observed.
Drinking alcohol
  • There is no potential interaction with alcohol.
Looking after your medicine
  • Store Intrarosa in a cool, dry place, out of direct light where the temperature is below 30°C. Do not freeze.
  • Keep Intrarosa in the original packaging, in a safe place, away from children.

For more information, see Section 5. What should I know while using Intrarosa? in the full CMI.

6. Are there any side effects?

The most common side effect is vaginal discharge. A change in your breast exam or Pap test results can occur while you take Intrarosa. Your healthcare professional will decide when to perform breast exams and Pap tests and will interpret the results.

For more information, including what to do if you have any side effects, see Section 6. Are there any side effects? in the full CMI.

 This medicine is subject to additional monitoring. This will allow quick identification of new safety information. You can help by reporting any side effects you may get. You can report side effects to your doctor, or directly at www.tga.gov.au/reporting-problems.



FULL CMI

INTRAROSA®

Active ingredient: prasterone


Consumer Medicine Information (CMI)

This leaflet provides important information about using Intrarosa. You should also speak to your doctor or pharmacist if you would like further information or if you have any concerns or questions about using Intrarosa.

Where to find information in this leaflet:

1. Why am I using Intrarosa?
2. What should I know before I use Intrarosa?
3. What if I am taking other medicines?
4. How do I use Intrarosa?
5. What should I know while using Intrarosa?
6. Are there any side effects?
7. Product details

1. Why am I using Intrarosa?

Intrarosa contains the active ingredient prasterone. Prasterone belongs to a class of drugs known as steroids.

Intrarosa is used to treat vulvar and vaginal atrophy in postmenopausal women with moderate to severe symptoms.

Prasterone is used to replace missing natural steroids in some women in order to relieve menopausal symptoms of vulvar and vaginal atrophy such as vaginal dryness, pain during sexual activity, irritation, or itching.

Intrarosa is a local hormone replacement therapy (HRT).

2. What should I know before I use Intrarosa?

Warnings

Do not use Intrarosa if:

  • You are allergic to prasterone, or any of the ingredients listed at the end of this leaflet.
  • You have or have ever had breast cancer, or if you are suspected of having it;
  • You have cancer which is sensitive to oestrogens, such as cancer of the womb lining (endometrium), or if you are suspected of having it;
  • You have excessive thickening of the womb lining (endometrial hyperplasia) that is not being treated;
  • You have or have ever had a blood clot in a vein (thrombosis), such as in the legs (deep venous thrombosis) or the lungs (pulmonary embolism);
  • You have a blood clotting disorder (such as protein C, protein S, or antithrombin deficiency);
  • You have or recently have had a disease caused by blood clots in the arteries, such as a heart attack, stroke or angina;
  • You have or have ever had a liver disease and your liver function tests have not returned to normal;
  • You have a rare blood problem called “porphyria” which is passed down in families (inherited);
  • You are pregnant or suspect you may be;
  • You are breastfeeding;
  • You have vaginal bleeding that has not been diagnosed.

If any of the above conditions appear for the first time while taking Intrarosa, stop taking it at once and consult your doctor immediately.

Check with your doctor if you:

  • Have a vaginal infection. The infection will need to be treated with antibiotics before starting treatment with Intrarosa.
  • Take any medicines for any other condition.

The use of Hormone Replacement Therapy (HRT) carries risks which need to be considered when deciding whether to start taking it, or whether to carry on taking it.

Before you start (or restart) HRT, your doctor will ask about your own and your family's medical history. Your doctor may decide to perform a physical examination. This may include an examination of your breasts and/or an internal examination, if necessary. Once you have started treatment you should see your doctor for regular check-ups.

Tell your doctor if you have ever had any of the following problems, before you start the treatment, as these may return or become worse during treatment with Intrarosa. If so, you should see your doctor more often for check-ups:

  • fibroids inside your womb;
  • growth of womb lining outside your womb (endometriosis) or a history of excessive growth of the womb lining (endometrial hyperplasia);
  • increased risk of developing blood clots (see “Blood clots in a vein (thrombosis)”);
  • increased risk of getting an oestrogen-sensitive cancer (such as having a mother, sister or grandmother who has had breast cancer);
  • high blood pressure;
  • a liver disorder, such as a benign liver tumour;
  • diabetes;
  • gallstones;
  • migraine or (severe) headaches;
  • a disease of the immune system that affects many organs of the body (systemic lupus erythematosus, SLE);
  • epilepsy;
  • asthma;
  • a disease affecting the eardrum and hearing (otosclerosis);
  • a very high level of fat in your blood (triglycerides);
  • fluid retention due to cardiac or kidney problems.

HRT and cancer

Intrarosa has not been studied in women with current or history of cancers.

Excessive thickening of the lining of the womb (endometrial hyperplasia) and cancer of the lining of the womb (endometrial cancer)

Taking oestrogen-only HRT tablets for a long time can increase the risk of developing cancer of the womb lining (the endometrium).

It is uncertain whether a risk exists with local vaginally administered products like Intrarosa used for long-term (more than one year) treatments.

If you get bleeding or spotting, it's usually nothing to worry about, but you should make an appointment to see your doctor. It could be a sign that your endometrium has become thicker.

The following risks apply to HRT medicines which circulate in the blood. It is not known how these risks apply to locally administered treatments such as Intrarosa. You should talk to your doctor if you are concerned.

Breast cancer

Evidence suggests that taking combined oestrogen-progestogen and possibly also oestrogen-only HRT increases the risk of breast cancer. The risk depends on how long you are using HRT. The additional risk becomes clear within a few years, however, it returns to normal within a few years (at most 5) after stopping treatment.

Regularly check your breasts. See your doctor if you notice any changes such as:

  • dimpling of the skin;
  • changes in the nipple;
  • any lumps you can see or feel.

Additionally, you are advised to join mammography screening programs when offered to you.

Ovarian cancer

Ovarian cancer is rare - much rarer than breast cancer. The use of oestrogen-only HRT has been associated with a slightly increased risk of ovarian cancer.

The risk of ovarian cancer varies with age. For example, in women aged 50 to 54 who are not taking HRT, about 2 women in 2000 will be diagnosed with ovarian cancer over a 5-year period. For women who have been taking HRT for 5 years, there will be about 3 cases per 2000 users (i.e. about 1 extra case).

Cases of ovarian and breast cancer have rarely been reported in women treated with 6.5 mg of prasterone for 52 weeks.

Effect of HRT on heart and circulation

Intrarosa has not been studied in women with history of thromboembolic diseases, uncontrolled hypertension or heart disease.

Blood clots in a vein (thrombosis)

The risk of blood clots in the veins is about 1.3 to 3-times higher in HRT users than in non-users, especially during the first year of taking it.

Blood clots can be serious, and if one travels to the lungs, it can cause chest pain, breathlessness, fainting or even death.

You are more likely to get a blood clot in your veins as you get older and if any of the following applies to you. Inform your doctor if any of these situations apply to you:

  • you are unable to walk for a long time because of major surgery, injury or illness;
  • you are seriously overweight (BMI >30 kg/m2);
  • you have any blood clotting problem that needs long-term treatment with a medicine used to prevent blood clots;
  • if any of your close relatives has ever had a blood clot in the leg, lung or another organ;
  • you have systemic lupus erythematosus (SLE);
  • you have cancer;
  • you have recently had a baby.

For signs of a blood clot, see "Stop using Intrarosa and see a doctor immediately" under Section 5.

Heart disease (heart attack) / Hypertension

For women taking oestrogen-only therapy there is no increased risk of developing a heart disease.

Stroke

The risk of getting stroke is about 1.5 times higher in HRT users than in non-users. The number of extra cases of stroke due to use of HRT will increase with age.

Other conditions

  • HRT can increase the levels of some plasma binding proteins such as thyroid binding globulin. Hormone concentrations remain unchanged.
  • HRT will not prevent memory loss. There is some evidence of a higher risk of memory loss in women who start using HRT after the age of 65. Speak to your doctor for advice;

During treatment, you may be at risk of developing certain side effects. It is important you understand these risks and how to monitor for them. See additional information under Section 6. Are there any side effects?

Pregnancy and breastfeeding

Intrarosa is for use in postmenopausal women only.

If you become pregnant or think you may be pregnant, stop taking Intrarosa immediately and contact your doctor.

Intrarosa is not recommended for use during breastfeeding. It is unknown if this medicine is excreted in human milk.

Children and adolescents

Intrarosa is only used in postmenopausal adult women.

3. What if I am taking other medicines?

Tell your doctor or pharmacist if you are taking any other medicines, including any medicines, vitamins or supplements that you buy without a prescription from your pharmacy, supermarket or health food shop.

Some medicines may interfere with Intrarosa and affect how it works.

Interactions of Intrarosa with other drugs have not been established.

The use of Intrarosa in combination with HRT (oestrogen-only or oestrogen-progestogen combination or androgen treatment) or vaginal oestrogens is not recommended.

Check with your doctor or pharmacist if you are not sure about what medicines, vitamins or supplements you are taking and if these affect Intrarosa.

4. How do I use Intrarosa?

How much to take

  • One pessary once a day.
  • Follow the instructions provided and use Intrarosa until your doctor tells you to stop.

When to take Intrarosa

  • Intrarosa should be used at bedtime.

How to use Intrarosa

  • Empty your bladder and wash and dry your hands before handling the pessary and the applicator.
  • Tear off 1 pessary along the perforations from the pessary strip.
  • Place the pessary in your vagina with the provided applicator (A), or with your fingers (B). Do not use any other applicator.

A. Using the applicator

STEP 1

1A. Remove 1 applicator from the package.

1B. The applicator must be activated before use. Pull back on the plunger until it stops to activate the applicator.

Place the applicator on a clean surface.

STEP 2

Slowly pull the plastic tabs on the pessary away from each other while keeping the pessary still between your fingers. Carefully remove the pessary from the plastic wrap. If a pessary falls on an unsanitary surface, throw it away and open a new one.

STEP 3

Place the flat end of the pessary into the open end of the activated applicator as shown. You are now ready to insert the pessary into your vagina.

STEP 4

Hold the applicator between your thumb and middle finger. Leave your index (pointer) finger free to press the applicator plunger after the applicator is inserted into your vagina.

STEP 5

Select the position for insertion of the pessary that is most comfortable for you.

5a. Lying position

5b. Standing position

STEP 6

Gently slide the pessary end of the applicator into your vagina as far as it will comfortably go.

Do not use force.

STEP 7

Press the applicator plunger with your index (pointer) finger to release the pessary. Remove the applicator. Wash it or throw it away after using for one week (two extra applicators are provided).

To wash the applicator:

  • Take the applicator apart, by pulling the plunger out of the body of the applicator
  • Rinse the 2 pieces for 30 seconds under running water
  • Wipe dry with a clean paper towel or something similar, and reassemble
  • Store the washed applicator in a clean place, separate to the unused applicators.

B. Using fingers

Unwrap the pessary as shown in Step 2. Place the pessary into your vagina with your fingers as far as it can comfortably go. Do not use force.

If you forget to use Intrarosa

Intrarosa should be used regularly at the same time each day. If you miss your dose at the usual time, use one as soon as you remember.

If your next dose is due in less than 8 hours, skip the dose you missed and take your next dose when you are meant to. Do not use more than one pessary at a time. 

Do not take a double dose to make up for the dose you missed.

If you think that you have used too much Intrarosa, you may need urgent medical attention.

You should immediately:

  • phone the Poisons Information Centre
    (by calling 13 11 26), or
  • contact your doctor, or
  • go to the Emergency Department at your nearest hospital.

You should do this even if there are no signs of discomfort or poisoning.

5. What should I know while using Intrarosa?

Things you should do

Once you have started using Intrarosa you should see your doctor for regular check-ups (at least every 6 months or as clinically appropriate). At these check-ups, discuss with your doctor the benefits and risks of continuing with Intrarosa.

Go for regular Pap tests, gynaecological and breast exams, as recommended by your doctor.

You may have vaginal discharge due to melting of the 'hard fat base' which adds to increased vaginal secretions due to treatment. If vaginal discharge occurs, you are not required to stop Intrarosa.

Remind any doctor, dentist, or pharmacist you visit that you are using Intrarosa.

Things you should not do

Do not use condoms, diaphragms or cervical caps made of latex when using Intrarosa as they may become damaged.

Stop using Intrarosa and see a doctor immediately if you:

Notice any of the following conditions when taking Intrarosa:

  • any of the conditions mentioned in Section 2 under 'What should I know before I use Intrarosa';
  • yellowing of your skin or the whites of your eyes (jaundice). These may be signs of a liver disease;
  • become pregnant;
  • a large rise in your blood pressure (symptoms may be headache, tiredness, dizziness);
  • migraine-like headaches which happen for the first time;
  • if you notice signs of a blood clot, such as:
    - painful swelling and redness of the legs;
    - sudden chest pain;
    - difficulty in breathing.

Driving or using machines

Intrarosa does not affect your ability to drive or use any machines or tools.

Looking after your medicine

Follow the instructions in the carton on how to take care of your medicine properly.

Store below 30°C in original package to protect from light. Store it in a cool dry place away from moisture, heat, or sunlight; for example, do not store it:

  • in the bathroom or near a sink, or
  • in the car or on window sills.

Do not freeze.

Keep it where young children cannot reach it.

Getting rid of any unwanted medicine

If you no longer need to use this medicine or it is out of date, take it to any pharmacy for safe disposal.

Do not use this medicine after the expiry date.

6. Are there any side effects?

All medicines can have side effects. If you do experience any side effects, most of them are minor and temporary. However, some side effects may need medical attention.

See the information below and, if you need to, ask your doctor or pharmacist if you have any further questions about side effects.

Less serious side effects

Less serious side effectsWhat to do
  • Vaginal discharge (the leakage can be due to the melting of the hard fat ingredient, and/or the increased vaginal secretions)
  • Weight fluctuation
Speak to your doctor if you have any of these less serious side effects and they worry you.

Serious side effects

A change in your breast exam or Pap test results can occur while you take Intrarosa. Your healthcare professional will decide when to perform breast exams and Pap tests and will interpret the results.

The following diseases are reported more often in women using HRT medicines which circulate in the blood compared to women not using HRT. These risks apply less to vaginally administered oestrogen treatments:

  • breast cancer;
  • ovarian cancer;
  • blood clots in the veins of the legs or lungs (venous thromboembolism);
  • heart disease
  • stroke.

The following side effects have been reported with other HRT containing oestrogens :

  • gall bladder disease;
  • various skin disorders;
  • memory loss.

Tell your doctor or pharmacist if you notice anything else that may be making you feel unwell.

Other side effects not listed here may occur in some people.

Reporting side effects

After you have received medical advice for any side effects you experience, you can report side effects to the Therapeutic Goods Administration online at www.tga.gov.au/reporting-problems. By reporting side effects, you can help provide more information on the safety of this medicine.

Always make sure you speak to your doctor or pharmacist before you decide to stop taking any of your medicines.

7. Product details

This medicine is only available with a doctor's prescription.

What Intrarosa contains

Active ingredient (main ingredient)Prasterone
Other ingredients (inactive ingredients)Hard fat
Potential allergensNone

The product is supplied with an applicator made of LDPE and 1% colourant (titanium dioxide).

Do not take this medicine if you are allergic to any of these ingredients.

What Intrarosa looks like

Intrarosa is a white to off-white, bullet-shaped pessary, approximately 28 mm long and 9 mm in diameter at its widest end. Intrarosa comes in PVC/LDPE blister packs of 7 pessaries each.

Intrarosa is available as a pack of 28 pessaries packaged with 6 reusable applicators. You can reuse each applicator for up to one week (two extra applicators are provided in case you need them).

Intrarosa may also be available as a starter pack of 7 pessaries and 1 reusable applicator.

(Aust R 391550).

Who distributes Intrarosa

Theramex Australia Pty Ltd
Level 22, 60 Margaret Street
Sydney NSW 2000
1800 THERAMEX or 1800 843 726
Email: [email protected]

This leaflet was prepared in September 2023.

Published by MIMS July 2024

BRAND INFORMATION

Brand name

Intrarosa

Active ingredient

Prasterone

Schedule

S4

 

1 Name of Medicine

Prasterone.

2 Qualitative and Quantitative Composition

Each pessary contains 6.5 mg of prasterone in hard fat.
For the full list of excipients, see Section 6.1 List of Excipients.

3 Pharmaceutical Form

Intrarosa is a white to off-white, bullet-shaped pessary, approximately 28 mm long and 9 mm in diameter at its widest end.

4 Clinical Particulars

4.1 Therapeutic Indications

Intrarosa is indicated for the treatment of vulvar and vaginal atrophy in postmenopausal women having moderate to severe symptoms.

4.2 Dose and Method of Administration

Dosage.

Intrarosa is administered intravaginally with the use of the provided applicator or with fingers.
One pessary is administered once a day at bedtime.
For the treatment of postmenopausal symptoms, Intrarosa 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 reassessed at least every 6 months (or as clinically appropriate) and Intrarosa should only be continued as long as the benefit outweighs the risk.
If a dose is forgotten, it should be taken as soon as the woman remembers. However, if the next dose is due in less than 8 hours, the woman should skip the missed pessary. Do not use two pessaries to make up for a forgotten dose.

Method of administration.

If Intrarosa is placed in the vagina using the provided applicator:
1. Activate the applicator (by pulling back the plunger) before use.
2. Place the flat end of the pessary into the open end of the activated applicator.
3. Insert the applicator into the vagina as far as it can comfortably go without force.
4. Press the plunger of the applicator to release the pessary.
5. Withdraw the applicator completely.
6. Disassemble the applicator and rinse the two pieces for 30 seconds under running water before drying with a paper towel or the like and then reassemble the applicator.
7. The washed applicator should be stored in a clean place, separate to the unused applicators. Discard the applicator after one week of usage. Two extra applicators are provided.
If Intrarosa is placed in the vagina with fingers:
1. Insert the pessary into the vagina as far as it can comfortably go without force.

4.3 Contraindications

Intrarosa is contraindicated in women with:
Hypersensitivity to the active substance or to the excipient listed in Section 6.1 List of Excipients;
Undiagnosed genital bleeding;
Known, past or suspected breast cancer;
Known or suspected oestrogen-dependent malignant tumours (e.g. endometrial cancer);
Untreated endometrial hyperplasia;
Known or suspected pregnancy;
Acute liver disease, or a history of liver disease as long as liver function tests have failed to return to normal;
Previous or current venous thromboembolism (VTE) (deep vein thrombosis, pulmonary embolism);
Known thrombophilic disorders (e.g. protein C, protein S, or antithrombin deficiency, see Section 4.4 Special Warnings and Precautions for Use);
Active or recent arterial thromboembolic disease (e.g. angina, myocardial infarction);
Porphyria.

4.4 Special Warnings and Precautions for Use

For the treatment of postmenopausal symptoms, Intrarosa 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 reassessed at least every 6 months (or as clinically appropriate) and Intrarosa should only be continued as long as the benefit outweighs the risk following discussions with their doctor.

Medical examination/ follow-up.

Before initiating Intrarosa, 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 special warnings and precautions for use according to the decision of their doctor. 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 (see 'Breast cancer' below). Investigations, including Pap smears and blood pressure measurements 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 Intrarosa, in particular:
leiomyoma (uterine fibroids) or endometriosis;
risk factors for thromboembolic disorders (see below);
risk factors for oestrogen dependent tumours, e.g. 1st 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.

Reasons for immediate withdrawal of therapy.

Therapy should be discontinued in case a contraindication is discovered and in the following situation:
Jaundice or deterioration in liver function.
Significant increase in blood pressure.
New onset of migraine-type headache.
Pregnancy.

Endometrial hyperplasia and carcinoma.

Oestrogen is a metabolite of prasterone. In women with an intact uterus, the risk of endometrial hyperplasia and carcinoma is increased when exogenous oestrogens are administered for prolonged periods. No cases of endometrial hyperplasia have been reported in women treated for 52 weeks during the clinical studies. Intrarosa has not been studied in women with endometrial hyperplasia.
For oestrogen products for vaginal application of which the systemic exposure to oestrogen remains within the normal postmenopausal range, it is not recommended to add a progestogen.
Endometrial safety of long-term of local vaginally administered prasterone has not been studied for more than one year. Therefore, if repeated, treatment should be reviewed at least annually.
If bleeding or spotting appears at any time on therapy, 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, caution is advised when using this product in women who have undergone hysterectomy because of endometriosis, especially if they are known to have residual endometriosis since intravaginal prasterone has not been studied in women with endometriosis.
Prasterone is metabolised into oestrogenic compounds. The following risks have been associated with systemic hormone replacement therapy (HRT) and apply to a lesser extent for oestrogen products for vaginal application of which the systemic exposure to the oestrogen remains within the normal postmenopausal range. However, they should be considered in case of long term or repeated use of this product.

Breast cancer.

The overall evidence suggests an increased risk of breast cancer in women taking combined oestrogen-progestogen and possibly also oestrogen-only systemic HRT, that is dependent on the duration of taking HRT. The excess risk becomes apparent within a few years of use but returns to baseline within a few (at most five) years after stopping treatment.
Intrarosa has not been studied in women with active or past breast cancer. One case of breast cancer at week 52 has been reported in 1196 women who have been exposed with the 6.5 mg dose which is below the incidence rate observed in the normal population of the same age.

Ovarian cancer.

Ovarian cancer is much rarer than breast cancer.
Epidemiological evidence from a large meta-analysis suggests a slightly increased risk in women taking oestrogen-only systemic HRT, which becomes apparent within 5 years of use and diminishes over time after stopping.
Intrarosa has not been studied in women with active or past ovarian cancer. One case of ovarian cancer has been reported in 1196 women who have been exposed with the 6.5 mg dose which is above the incidence rate observed in the normal population of the same age. Of note, this case was present before start of treatment and was bearing a BRCA1 mutation.

Abnormal Pap smear.

Intrarosa has not been studied in women with abnormal Pap smears (atypical squamous cells of undetermined significance (ASCUS)) or worse. Cases of abnormal pap smears corresponding to ASCUS or low grade squamous intraepithelial lesion (LSIL) have been reported in women treated with the 6.5 mg dose (common frequency).

Venous thromboembolism.

Intrarosa has not been studied in women with current or previous venous thromboembolic disease.
Systemic HRT is associated with a 1.3-3-fold risk of developing venous thromboembolism (VTE), i.e. deep vein thrombosis or pulmonary embolism. The occurrence of such an event is more likely in the first year of HRT than later (see Section 4.8 Adverse Effects (Undesirable Effects)).
Patients with known thrombophilic states have an increased risk of VTE and HRT may add to this risk. HRT is therefore contraindicated in these patients (see Section 4.3 Contraindications).
Generally recognised risk factors for VTE include, use of oestrogens, older age, major surgery, prolonged immobilisation, obesity (BMI > 30 kg/m2), pregnancy/postpartum period, systemic lupus erythematosus (SLE), and cancer. There is no consensus about the possible role of varicose veins in VTE.
As in all postoperative patients, prophylactic measures need be considered to prevent VTE following surgery. If prolonged immobilisation is to follow elective surgery temporarily stopping HRT 4 to 6 weeks earlier is recommended. Treatment should not be restarted until the woman is completely mobilised.
In women with no personal history of VTE but with a first degree relative with a history of thrombosis at young age, screening may be offered after careful counselling regarding its limitations (only a proportion of thrombophilic defects are identified by screening).
If a thrombophilic defect is identified which segregates with thrombosis in family members or if the defect is 'severe' (e.g. antithrombin, protein S, or protein C deficiencies or a combination of defects) HRT is contraindicated.
Women already on chronic anticoagulant treatment require careful consideration of the benefit-risk of use of HRT.
If VTE develops after initiating therapy, Intrarosa 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).
One case of pulmonary embolism has been reported in the 6.5 mg group and one in the placebo group during clinical studies.

Coronary artery disease (CAD)/ hypertension.

Intrarosa has not been studied in women with uncontrolled hypertension (blood pressure above 140/90 mmHg) and cardiovascular disease. Cases of hypertension have been reported in clinical studies with an uncommon frequency and similar incidence rates were observed in both groups (6.5 mg prasterone and placebo). No case of coronary artery disease has been reported during clinical studies.

Ischaemic stroke.

Systemic oestrogen-only therapy is associated with an up to 1.5-fold increase in risk of ischaemic stroke. The relative risk does not change with age or time since menopause. However, as the baseline risk of stroke is strongly age-dependent, the overall risk of stroke in women who use HRT will increase with age (see Section 4.8 Adverse Effects (Undesirable Effects)).
Intrarosa has not been studied in women with current or previous arterial thromboembolic disease. No cases of arterial thromboembolic disease have been reported during clinical studies.

Other conditions observed with HRT.

Oestrogens may cause fluid retention, and therefore patients with cardiac or renal dysfunction should be carefully observed.
Women with pre-existing hypertriglyceridaemia should be followed closely during oestrogen replacement or HRT, 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).
HRT use does not improve cognitive function. There is some evidence of increased risk of probable dementia in women who start using continuous combined or oestrogen-only HRT after the age of 65.
None of these conditions has been observed with Intrarosa during the clinical studies.
Women should undergo regular gynaecological and breast exams according to current Australian guidelines.
Women with vaginal infection should be treated with appropriate antimicrobial therapy before starting Intrarosa.
Due to the melting of the hard fat base, added to an expected increase in vaginal secretions due to treatment, vaginal discharge can occur although it does not require a stop to Intrarosa (see Section 4.8 Adverse Effects (Undesirable Effects)).
Use of Intrarosa with condoms, diaphragms or cervical caps made of latex must be avoided since the rubber may be damaged by the preparation.
Intrarosa has not been studied in women with a current hormonal treatment: HRT (oestrogens alone or combined with progestogens) or androgens treatment.

Use in hepatic impairment.

No dose adjustment is required in case of hepatic impairment. The pharmacokinetics of prasterone have not been studied in these patients.

Use in renal impairment.

No dose adjustment is required in case of renal impairment. The pharmacokinetics of prasterone have not been studied in these patients.

Use in the elderly.

Among 1196 patients who received Intrarosa in clinical trials, 17% of participants in the four 12-week placebo-controlled studies were older than 65 years of age and 9.2% of participants in the 52-week open-label clinical trial were over 65 years of age. Use as recommended. No dose adjustment is required in elderly.

Paediatric use.

No data available. Intrarosa is only indicated for use in postmenopausal women.

Effects on laboratory tests.

Laboratory parameters.

Hematology, serum chemistry and urinalysis parameters displayed no clinically significant changes from baseline to the final assessment (up to 12 weeks), and values generally remained within the normal adult female ranges.

Cervical cytology.

According to study protocol, participants were to have a normal Pap smear and normal mammography at study entrance. In the 521 postmenopausal women who participated in the 52-week non-comparative, open-label clinical trial, 11 cases of abnormal Pap smear (2.1%) were reported. The 11 cases of abnormal Pap smear at week 52 included 10 cases of atypical squamous cells of unknown significance (ASCUS) and 1 case of low grade squamous intraepithelial lesion (LSIL).

4.5 Interactions with Other Medicines and Other Forms of Interactions

Concomitant use with systemic hormone replacement therapy (oestrogen-only or oestrogen, progestogen combination or androgen treatment) or vaginal oestrogens has not been investigated and is therefore not recommended.
Interactions between Intrarosa and other medicinal products have not been established but are not expected. Prasterone was shown not to inhibit CYP1A2, 2B7, 2C8, 2C9, 2C19, 2D6, 2E1 or 3A4 at clinically relevant concentrations in vitro.

Other forms of interactions.

Intrarosa can weaken condoms, diaphragms or cervical caps made of latex (see Section 4.4 Special Warnings and Precautions for Use).
Intrarosa is not expected to interact with other substances.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

Intrarosa is not indicated in fertile women. No fertility studies have been performed with prasterone in animals.
(Category D)
Intrarosa is contraindicated in pregnancy. There are no data on the use of Intrarosa in pregnant women. Being only indicated in postmenopausal women, no embryofetal developmental studies have been performed with prasterone in animals. Concerns for potential adverse effects on embryofetal development are held based on the formation of oestradiol and testosterone from prasterone.
Intrarosa is not indicated during breast-feeding. There is no information on the presence of prasterone in human milk, the effects on the breastfed infant, or the effects on milk production.

4.7 Effects on Ability to Drive and Use Machines

Intrarosa does not affect the patient's ability to drive or operate machinery.

4.8 Adverse Effects (Undesirable Effects)

Clinical trial adverse events.

The safety data for Intrarosa was obtained from one single-centre and four multicentre, randomized, double blind, placebo-controlled PK/efficacy studies and one uncontrolled, 52 week open-label safety study. The safety data presented in Table 1 was pooled for a total of 1196 postmenopausal women treated with vaginal pessaries containing 6.5 mg of prasterone (Intrarosa), including 435 women treated daily for one year and 474 women who received placebo.

Summary of safety profile.

The most frequently observed adverse reaction was vaginal discharge. This is due to melting of the hard fat used as vehicle, added to the expected increase in vaginal secretions due to treatment. It is not required to stop Intrarosa if vaginal discharge occurs (see Section 4.4 Special Warnings and Precautions for Use).

Tabulated list of adverse reactions.

Adverse reactions observed with prasterone 6.5 mg pessaries (Intrarosa) obtained from clinical studies are tabulated in Table 2.

Breast cancer risk.

An up to 2-fold increased risk of having breast cancer diagnosed is reported in women taking combined oestrogen-progestogen therapy for more than 5 years.
Any increased risk in users of oestrogen-only therapy is substantially lower than that seen in users of oestrogen-progestogen combinations.
The level of risk is dependent on the duration of use (see Section 4.4 Special Warnings and Precautions for Use).
Results of the largest randomised placebo-controlled study (WHI-study) and largest epidemiological study (MWS) are presented in Tables 3 and 4.

Note.

Since the background incidence of breast cancer differs by EU country, the number of additional cases of breast cancer will also change proportionately.

Ovarian cancer.

Use of oestrogen-only or combined oestrogen-progestogen HRT has been associated with a slightly increased risk of having ovarian cancer diagnosed (see Section 4.4 Special Warnings and Precautions for Use).
A meta-analysis from 52 epidemiological studies reported an increased risk of ovarian cancer in women currently using HRT compared to women who have never used HRT (RR 1.43, 95% CI 1.31-1.56). For women aged 50 to 54 years taking 5 years of HRT, this results in about 1 extra case per 2000 users. In women aged 50 to 54 who are not taking HRT, about 2 women in 2000 will be diagnosed with ovarian cancer over a 5-year period.

Risk of venous thromboembolism.

HRT is associated with a 1.3-3-fold increased relative risk of developing VTE, i.e. deep vein thrombosis or pulmonary embolism. The occurrence of such an event is more likely in the first year of using HT (see Section 4.4 Special Warnings and Precautions for Use). Results of the WHI studies are presented in Table 5.

Risk of coronary artery disease.

The risk of coronary artery disease is slightly increased in users of combined oestrogen-progestogen HRT over the age of 60 (see Section 4.4 Special Warnings and Precautions for Use).

Risk of ischaemic stroke.

The use of oestrogen-only and oestrogen + progestogen therapy is associated with an up to 1.5-fold increased relative risk of ischaemic stroke. The risk of haemorrhagic stroke is not increased during use of HRT.
This relative risk is not dependent on age or on duration of use, but as the baseline risk is strongly age-dependent, the overall risk of stroke in women who use HRT will increase with age, see Section 4.4 Special Warnings and Precautions for Use. See Table 6.
Other adverse reactions have been reported in association with oestrogen/progestogen treatment:
Gall bladder disease.
Skin and subcutaneous disorders: chloasma, erythema multiforme, erythema nodosum, vascular purpura.
Probable dementia over the age of 65 (see Section 4.4 Special Warnings and Precautions for Use).

Reporting suspected adverse events.

Reporting suspected adverse reactions after registration 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 at https://www.tga.gov.au/reporting-problems.

4.9 Overdose

No experience of overdosage is available. In the event of overdose, vaginal douching is recommended.
For information on the management of overdose, contact the Poisons Information Centre on 13 11 26 (Australia).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Pharmacotherapeutic group: other sex hormones and modulators of the genital system. ATC code: G03XX01

Mechanism of action.

Prasterone is biochemically and biologically identical to endogenous human dehydroepiandrosterone (DHEA), a precursor steroid with no or little pharmacological activity itself that is converted into oestrogens and androgens. These metabolites formed from prasterone activate oestrogen and androgen receptors. Intrarosa is thus different from the oestrogens preparations since it also delivers androgen metabolites.
An increase in the number of superficial and intermediate cells and decrease in the number of parabasal cells in the vaginal mucosa is noted. In addition, the vaginal pH decreased towards the normal range, thus facilitating the growth of the normal bacterial flora.

Clinical efficacy.

Physiological response (objective measures).

Efficacy data were obtained from two US and Canadian randomised, double-blind, placebo-controlled, multicentre, pivotal phase III studies (ERC-231/Study 1 and ERC-238/Study 2) performed in postmenopausal women aged 40 to 80 years (mean age = 58.6 years in Study 1 and 59.5 years in Study 2) with vulvar and vaginal atrophy (VVA). At baseline, women had ≤ 5.0% superficial cells in the vaginal smear, a vaginal pH ˃ 5.0 and they had identified dyspareunia (moderate to severe) as their most bothersome symptom (MBS) of VVA. After 12 weeks of daily treatment with a prasterone 6.5 mg pessary (n = 81 in Study 1 and n = 325 in Study 2), the change from baseline, in comparison with placebo treatment (n = 77 in Study 1 and n = 157 in Study 2), demonstrated significant improvements of the 3 co primary endpoints compared to placebo in both studies, namely increase of the percentage of superficial cells (p < 0.0001), decrease of the percentage of parabasal cells (p < 0.0001), and decrease in the vaginal pH (p < 0.0001).

Symptoms (subjective measures).

The MBS dyspareunia (co-primary endpoint) was assessed at baseline and 12 weeks with the severity scored as follows: None = 0, Mild = 1, Moderate = 2, Severe = 3. Table 3 shows the mean change in severity score in MBS dyspareunia after 12 weeks with associated statistical testing for the difference vs. placebo for Study 1 (ERC 231) and Study 2 (ERC 238). See Table 7.
Table 8 shows the percentage of subjects who reported a change from baseline in their MBS dyspareunia at week 12. "Improvement" was defined as a reduction in the severity score of 1 or more. "Relief" was defined as no or only mild symptoms at week 12. "Substantial improvement" was restricted to patients who had moderate or severe MBS at baseline and changed from severe to mild or severe or moderate to none.

Clinical safety.

Apart from the main two 12-week phase III clinical studies, the safety data of Intrarosa has also been obtained from one non comparative open-label safety study of one year.
Cases of breast and ovarian cancer have been reported in women treated with 6.5 mg of prasterone for 52 weeks (see Section 4.4 Special Warnings and Precautions for Use).
Cases of abnormal Pap smears either ASCUS or LSIL have been reported with a common frequency in women treated with Intrarosa for 52 weeks (see Section 4.4 Special Warnings and Precautions for Use).

Endometrial safety.

On the 389 evaluable end-of-study endometrial biopsies performed after 52 weeks of treatment with Intrarosa, no histological abnormalities were reported on the biopsies.

5.2 Pharmacokinetic Properties

Absorption.

Prasterone administered locally in the vagina enters the vaginal cells and is converted intracellularly into oestrogens and androgens, depending upon the level of particular steroidogenic enzymes expressed in each cell type.
In a study conducted in postmenopausal women, administration of the Intrarosa pessary once daily for 7 days resulted in a mean prasterone Cmax and area under the curve from 0 to 24 hours (AUC0-24) at day 7 of 4.4 nanogram/mL and 56.2 nanogram h/mL, respectively, which were significantly higher than those in the group treated with placebo (Table 9; Figure 1). The Cmax and AUC0-24 of the metabolites testosterone and oestradiol were also slightly higher in women treated with the Intrarosa pessary compared to those receiving placebo but all remained within normal values of postmenopausal women (< 10 picogram oestradiol/mL; < 0.26 nanogram testosterone/mL) as measured by validated mass spectrometry-based assays for both the study samples and reference values.

Distribution.

The distribution of intravaginal (exogenous) prasterone is mainly local but some increase in systemic exposure is observed especially for the metabolites but within normal values.

Metabolism.

Exogenous prasterone is metabolised in the same manner as endogenous prasterone. Systemic metabolism has not been studied in this application.

Excretion.

Systemic excretion has not been studied specifically for this application.

5.3 Preclinical Safety Data

Genotoxicity.

Prasterone was not genotoxic in an in vitro bacterial mutagenicity assay (Ames test), an in vitro chromosomal aberration assay (performed in human lymphocytes) or in vitro in the mouse bone marrow micronucleus test.

Carcinogenicity.

Long-term studies in animals to determine carcinogenic potential have not been performed with prasterone. Oestradiol and testosterone, two metabolites of prasterone, are carcinogenic in animals.

6 Pharmaceutical Particulars

6.1 List of Excipients

Hard fat.

6.2 Incompatibilities

Due to the local action of Intrarosa in the vagina, incompatibilities are not expected, see Section 4.5 Interactions with Other Medicines and Other Forms of Interactions.

6.3 Shelf Life

In Australia, information on the shelf life can be found on the public summary of the Australian Register of Therapeutic Goods (ARTG). The expiry date can be found on the packaging.

6.4 Special Precautions for Storage

Store below 30°C. Store in original container. Do not freeze. Protect from light.

6.5 Nature and Contents of Container

Intrarosa is available in a small carton box containing 4 PVC/LDPE blister packs of 7 pessaries each (28 pessaries per box). The box containing the pessaries is packed inside a larger carton box with 6 plastic applicators and the patient medication information.
Intrarosa is available as a starter pack containing 7 pessaries with 1 plastic applicator and the patient medication information.
The applicator is made of LDPE and 1% colourant (titanium dioxide).

6.6 Special Precautions for Disposal

In Australia, any unused medicine or waste material should be disposed of in accordance with local requirements.

6.7 Physicochemical Properties

Chemical name: 3β-hydroxyandrost-5-en-17-one, 5-androstene-3β -ol-17-one.
Molecular formula and molecular mass: C19H28O2 (288.43 g/mol).

Chemical structure.


CAS number.

53-43-0.

7 Medicine Schedule (Poisons Standard)

Prescription Only Medicine (Schedule 4).

Summary Table of Changes