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Benilexa One Handed 20 micrograms / 24 hours Intrauterine Delivery System – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
20 micrograms / 24 hours
Contains active substance:

Patient leaflet - Benilexa One Handed 20 micrograms / 24 hours Intrauterine Delivery System

1. What Benilexa One Handed is and what it is used for

Benilexa One Handed is an intrauterine delivery system (IUS) for insertion in the womb (uterus), where it slowly releases the hormone levonorgestrel.

It is used for:

Contraception

Benilexa One Handed is an effective, long-term and non-permanent (reversible) method of contraception. Benilexa One Handed prevents pregnancy by thinning the lining of your womb (uterus), by making the normal mucus in the opening of the womb (cervical canal) thicker, so that the sperm cannot get through to fertilise the egg and by preventing the release of eggs (ovulation) in some women. Furthermore, the presence of the T-shaped frame causes local effects on the lining of the womb.

Benilexa One Handed should be removed after 8 years of use when used for contraception.

Treating heavy menstrual bleeding

Benilexa One Handed is also useful for reducing menstrual blood flow, so it can be used if you suffer from heavy menstrual bleeding (periods). This is called menorrhagia. The hormone in Benilexa One Handed acts by thinning the lining of your uterus so that there is less bleeding every month. Benilexa One Handed should be removed or exchanged after 8 years of use, or earlier if heavy or bothersome menstrual bleeding returns.

Children and adolescents

Benilexa One Handed is not indicated for use before the first menstrual bleeding (menarche).

2. What you need to know before you use Benilexa One Handed

Do not use Benilexa One Handed

  • if you are pregnant or suspect that you may be pregnant; – if you have or have had pelvic inflammatory disease;

  • if you have an unusual or unpleasant vaginal discharge, or vaginal itching, as this may indicate an infection;
  • if you have or have had inflammation of the lining of your womb following delivery of your baby;
  • if you have or have had an infection of the womb after delivery or after abortion during the past 3 months;
  • if you have or have had inflammation of the cervix (neck of your womb); – if you have or have had an abnormal smear test (changes in the cervix); – if you have or have had liver problems;
  • if you have liver tumour;
  • if you have an abnormal womb, including uterine fibroids, especially those that distort the uterine cavity;
  • if you have an abnormal vaginal bleeding pattern;
  • if you have any condition which makes you susceptible to infections. A doctor will have told you if you have this;
  • if you have or have had hormone dependent cancer, such as breast cancer;
  • if you have or have had any type of cancer or suspected cancer including blood (leukaemia) uterine and cervical cancer, unless in remission; – if you have or have had trophoblastic disease. A doctor will have told you if you have this;
  • if you are allergic (hypersensitive) to levonorgestrel or any of the other ingredients of this medicine (listed in section 6).

Warnings and precautions

Before you have Benilexa One Handed fitted, your doctor or nurse will carry out some tests to make sure that Benilexa One Handed is suitable for you to use. This will include a pelvic examination and may also include other examinations such as a breast examination, if your doctor or nurse feels this is appropriate.

Genital infections will need to be successfully treated before you can have Benilexa One Handed fitted.

If you have epilepsy, tell the doctor or nurse fitting Benilexa One Handed because, although rare, a fit can occur during insertion. Some women might feel faint after the procedure. This is normal and your doctor or nurse will tell you to rest for a while.

Benilexa One Handed may not be suitable for all women.

Benilexa One Handed, like other hormonal contraceptives, does not protect against HIV infection (AIDS) or any other sexually transmitted disease (e.g. chlamydia, genital herpes, genital warts, gonorrhoea, hepatitis B and syphilis). You will need condoms to protect yourself from these diseases.

Talk to your doctor before using Benilexa One Handed: – if you have or develop migraine, dizziness, blurred vision, unusually bad headaches or if you have headaches more often than before; – if you have yellowing of the skin or whites of the eyes (jaundice); – if you are diabetic (too high blood glucose level), have high blood pressure or abnormal blood lipid levels;

  • if you have had cancer affecting your blood (including leukaemia) which is now in remission;
  • if you are on long-term steroid therapy;
  • if you have ever had an ectopic pregnancy (development of the foetus outside the womb) or a history of ovarian cysts;
  • if you have had or have severe arterial disease, such as heart attack, or stroke, or if you have any heart problems;
  • if you have a history of blood clots (thrombosis);
  • if you are taking any other medicines as some medicines may stop Benilexa One Handed from working properly;
  • if you have irregular bleedings;
  • if you have fits (epilepsy).

Your doctor will decide if you can use Benilexa One Handed if you have or have had some of the above conditions.

You must also tell your doctor if any of these conditions occur for the first time whilst you have Benilexa One Handed in place.

You must see a doctor or nurse as soon as possible if you develop painful swelling in your leg, sudden chest pain or difficulty in breathing as these may be a sign of a blood clot. It is important that any blood clots are treated promptly.

Expulsion

The muscular contractions of the womb during menstruation may sometimes push the IUS out of place or expel it. This is more likely to occur if you are overweight at the time of IUS insertion or have a history of heavy periods. If the IUS is out of place, it may not work as intended and therefore, the risk of pregnancy is increased. If the IUS is expelled, you are not protected against pregnancy anymore.

Possible symptoms of an expulsion are pain and abnormal bleeding but Benilexa One Handed may also come out without you noticing. As Benilexa One Handed decreases menstrual flow, increase of menstrual flow may be indicative of an expulsion.

It is recommended that you check for the threads with your finger, for example while having a shower. See also section 3 “How to use Benilexa One Handed – How can I tell whether the system is in place?”. If you have signs indicative of an expulsion or you cannot feel the threads, you should use another contraceptive (such as condoms), and consult your healthcare professional.

Psychiatric disorders

Some women using hormonal contraceptives including Benilexa One Handed have reported depression or depressed mood. Depression can be serious and may sometimes lead to suicidal thoughts. If you experience mood changes and depressive symptoms contact your doctor for further medical advice as soon as possible.

Benilexa One Handed and smoking

Women are advised to give up smoking. Smoking increases the risk of developing a heart attack, stroke, or blood clot.

Use of tampons and menstrual cups

Use of sanitary pads is recommended. If tampons or menstrual cups are used, you should change them with care so as not to pull the threads of Benilexa One Handed.

Other medicines and Benilexa One Handed

The effect of hormonal contraceptives such as Benilexa One Handed may be reduced by medicines that increase the amounts of enzymes made by the liver. Please tell your doctor if you are taking:

  • phenobarbital, phenytoin or carbamazepine (to treat epilepsy); – griseofulvin (an antifungal);
  • rifampicin or rifabutin (antibiotics);
  • nevirapine or efavirenz (for HIV).

Tell your doctor if you are taking, have recently taken or might take any other medicines. Benilexa One Handed should not be taken simultaneously with another hormonal contraceptive method.

Pregnancy, breast-feeding and fertility

Benilexa One Handed must not be used during pregnancy or if you may suspect that you are pregnant.

Can I become pregnant whilst using Benilexa One Handed? It is very rare for women to become pregnant with Benilexa One Handed in place.

Missing a period may not mean that you are pregnant. Some women may not have periods whilst using the system.

If you have not had a period for 6 weeks then consider having a pregnancy test. If this is negative there is no need to carry out another test, unless you have other signs of pregnancy, e.g. sickness, tiredness or breast tenderness. If you become pregnant with Benixela One Handed in place, you should see your healthcare professional immediately to have Benilexa One Handed removed. The removal may cause a miscarriage. However, if Benilexa One Handed is left in place during pregnancy, not only is the risk of having a miscarriage higher, but also the risk of preterm labor. If Benilexa One Handed cannot be removed, talk with your healthcare professional about the benefits and risks of continuing the pregnancy. If the pregnancy is continued, you will be closely monitored during your pregnancy and you should contact your doctor right away if you experience stomach cramps, pain in your stomach or fever. Benilexa One Handed contains a hormone, called levonorgestrel, and there have been isolated reports of effects on the genitalia of female babies if exposed to levonorgestrel intra-uterine devices while in the womb.

What if I want a baby?

If you want a baby, ask your doctor to remove Benilexa One Handed. Your usual level of fertility will return very quickly after the system is removed.

Can I breast-feed while using Benilexa One Handed?

Very small amounts of the hormone in Benilexa One Handed are found in breast milk. A risk to the newborns/infants is not expected. Breast-feeding can be continued during use of Benilexa One Handed.

Driving and using machines

There are no known effects on the ability to drive or use machines.

Benilexa One Handed contains barium sulphate.

The T-frame of Benilexa One Handed contains barium sulphate so that it can be seen on X-rays.

3. How to use Benilexa One Handed

Only a doctor or specially trained nurse can fit the system (see special instructions for insertion in the package).

They will explain the fitting procedure and any risks associated with its usage. You will then be examined by your doctor or nurse before Benilexa One Handed is fitted. If you have any concerns over its usage you should discuss it with them.

Starting to use Benilexa One Handed

  • Before Benilexa One Handed is inserted, it needs to be ensured that you are not pregnant.
  • You should have Benilexa One Handed inserted within 7 days from the start of your menstrual period. When Benilexa One Handed is inserted on these days, Benilexa One Handed works right away and will prevent you getting pregnant.
  • If you cannot have Benilexa One Handed inserted 7 days from the start of your menstrual period or if your menstrual period comes at unpredictable times, then Benilexa One Handed can be inserted on any other day. In this case, you must not have had sexual intercourse without contraception since your last menstrual period, and you should have a negative pregnancy test before insertion. Also, Benilexa One Handed may not reliably prevent pregnancy right away. Therefore, you should use a barrier method of contraception (such as condoms) or abstain from vaginal intercourse during the first 7 days after Benilexa One Handed is inserted.
  • Benilexa One Handed is not suitable for use as an emergency contraceptive (postcoital contraceptive).

Starting to use Benilexa One Handed after giving birth • Benilexa One Handed can be inserted after giving birth once the uterus has returned to normal size, but not earlier than 6 weeks after delivery (see section 4 “Possible side effects – Perforation”).

  • See also “Starting to use Benilexa One Handed” above for what else you need to know about the timing of insertion.

Starting to use Benilexa One Handed after an abortion Benilexa One Handed can be inserted immediately after an abortion, if the pregnancy was less than 3 months along provided that there are no genital infections. Benilexa One Handed will then work right away.

Replacing Benilexa One Handed

Benilexa One Handed can be replaced by a new Benilexa One Handed at any time of your menstrual cycle. Benilexa One Handed will then work right away.

Changing from another contraceptive method (such as combined hormonal contraceptives, implant)

  • Benilexa One Handed can be inserted immediately if it is reasonably certain that you are not pregnant.
  • If it has been more than 7 days since your menstrual bleeding began, you should abstain from vaginal intercourse or use additional contraceptive protection for the next 7 days.

    Placement of Benilexa One Handed

    Examination by your healthcare professional before placement may include: • a cervical smear test (Pap smear)

    • examination of the breasts
    • other tests, e.g. for infections, including sexually transmitted diseases, pregnancy test, as necessary. Your healthcare professional will also do a gynaecological examination to determine the position and size of the womb.

After a gynaecological examination

  • An instrument called a speculum is placed into the vagina, and the cervix may be cleansed with an antiseptic solution. Benilexa One Handed is then placed into the womb using a thin, flexible plastic tube (the placement tube). Local anaesthesia may be applied to the cervix prior to placement. • Some women feel dizzy or faint during placement or after Benilexa One Handed is placed or removed.
  • You may experience some pain and bleeding during or just after placement.

After placement of Benilexa One Handed you should receive a patient reminder card from your doctor for follow-up examinations. Bring this with you to every scheduled appointment.

How quickly should Benilexa One Handed work?

Contraception

If Benilexa One Handed is inserted into your womb either during your period or within 7 days from the beginning of your period or you have a device and it is time to replace it with a new one or if you just had an abortion, you are protected from pregnancy as soon as the system is fitted.

Heavy menstrual bleeding

Benilexa One Handed usually results in lighter periods after 3 to 6 months of treatment.

How will Benilexa One Handed affect my periods?

Many women have spotting (a small amount of blood loss) for the first 3-6 months after the system is fitted. Others will have prolonged or heavy bleeding. You may have an increase in bleeding however, usually in the first 2 to 3 months, before a reduction in blood loss is achieved. Overall, you are likely to have fewer days of bleeding in each month and you might eventually have no periods at all. This is due to the effect of the hormone (levonorgestrel) on the lining of the womb. If a remarkable reduction in blood loss is not achieved after 3 to 6 months, other treatments should be considered.

If you have had Benilexa One Handed fitted for quite a long time and then start to have bleeding problems, contact your doctor or healthcare provider for advice.

How often should I have the system checked?

You should have your Benilexa One Handed checked 4 to 6 weeks after placement, and thereafter regularly, at least once a year until it is removed. Your doctor may determine how often and what kinds of check-ups are required in your particular case. Bring the patient reminder card you have received from your doctor to every scheduled appointment. In addition, you should contact your doctor if any of the symptoms described in section 2 “Warnings and precautions” occur.

How can I tell whether the system is in place?

After each menstrual period, you can feel for the two thin threads attached to the lower end of the system. Your doctor will show you how to do this. Do not pull the threads because you may accidentally pull it out. If you cannot feel the threads, contact your doctor or nurse as soon as possible and in the meantime avoid intercourse or use a barrier contraceptive (such as condoms). The threads may have simply drawn up into the womb or cervical canal. If the threads still cannot be found by your doctor or nurse, they may have broken off, or Benilexa One Handed may have come out by itself, or in rare cases it may have perforated the wall of your womb (uterine perforation, see section 4). You should also go to your doctor if you can feel the lower end of the device itself or you or your partner feel pain or discomfort during sexual intercourse.

What happens if the system comes out by itself?

If the system comes out either completely or partially, you may not be protected against pregnancy. It is rare but possible for this to happen without you noticing during your menstrual period. An unusual increase in the amount of bleeding during your period might be a sign that this has happened. Tell your doctor or healthcare provider if there are any unexpected changes in your bleeding pattern.

Removal of Benilexa One Handed

Benilexa One Handed should be removed or exchanged after 8 years of use, or earlier if heavy or bothersome menstrual bleeding returns. Your doctor can easily remove the system at any time, after which pregnancy is possible. Some women feel dizzy or faint during or after Benilexa One Handed is removed. You may experience some pain and bleeding during removal of Benilexa One Handed.

Continuation of contraception after removal

If pregnancy is not desired, Benilexa One Handed should not be removed after the seventh day of the menstrual cycle (monthly period) unless you use other methods of contraception (e.g. condoms) for at least 7 days before the IUS removal.

If you have irregular periods (menses) or no periods, you should use a barrier method of contraception for 7 days before removal.

A new Benilexa One Handed can also be placed immediately after removal, in which case no additional protection is needed. If you do not wish to continue using the same method, ask your doctor for advice about other reliable contraceptive methods.

If you have any further questions on the use of this medicine, ask your doctor.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

With Benilexa One Handed, side effects are most common during the first months after the system is fitted and decrease as time goes on.

If you experience any of the following serious side effects please contact your doctor or nurse immediately:

  • Severe pain or fever developing shortly after insertion may mean that you have a severe infection which must be treated immediately. In rare cases very severe infection (sepsis) can occur.
  • Severe pain and continued bleeding as this might be a sign of damage or tear in the wall of the womb (perforation). Perforation is uncommon, but occurs most often during the fitting of the Benilexa One Handed, although the perforation may not be detected until sometime later. A Benilexa One Handed which has become lodged outside the cavity of the womb is not effective in preventing pregnancy and must be removed as soon as possible; very rarely this may require surgery. The risk of perforation is low, but is increased in breast-feeding women and in women who have had a baby up to 36 weeks before insertion and may be increased in women with the uterus fixed and leaning backwards (fixed retroverted uterus). If you suspect you may have experienced a perforation, seek prompt advice from a healthcare provider and remind them that you have Benilexa One Handed inserted, especially if they were not the person who inserted it.

    Possible signs and symptoms of perforation may include:

    • severe pain (like menstrual cramps) or more pain than expected – heavy bleeding (after insertion)
    • pain or bleeding which continues for more than a few weeks – sudden changes in your periods
    • pain during sex
    • you can no longer feel the Benilexa One Handed threads (see “How can I tell whether the system is in place?” in section 3).
  • Lower abdominal pain especially if you also have a fever or have missed a period or have unexpected bleeding, as this might be a sign of ectopic pregnancy (development of the foetus outside the womb). The absolute risk of ectopic pregnancy in Benilexa One Handed users is low. However, when a woman becomes pregnant with Benilexa One Handed in place, the relative likelihood of ectopic pregnancy is increased.
  • Lower abdominal pain or experience painful or difficult sex as this might be a sign of ovarian cysts or pelvic inflammatory disease. This is important as pelvic infections can reduce your chances of having a baby and can increase the risk of ectopic pregnancy.

Other side effects

Very common (may affect more than 1 in 10 women) side effects can include:

  • absent, light or infrequent menstrual periods (see “How will Benilexa One Handed affect my periods?” in section 3);
  • vaginal bleeding including spotting;
  • bacterial or fungal infections of the vagina and the outer genitalia (vulva); – spots (acne).

Common (may affect up to 1 in 10 women) side effects can include: – depression, nervousness or other mood changes;

  • reduced sex drive;
  • headache;
  • migraine;
  • feeling faint (presyncope);
  • dizziness;
  • back pain;
  • abdominal discomfort;
  • feeling sick (nausea);
  • bloated abdomen;
  • vomiting;
  • painful periods;
  • increased vaginal discharge;
  • tender, painful breasts;
  • spasm of the womb;
  • Benilexa One Handed coming out by itself;
  • weight gain.

Uncommon (may affect up to 1 in 100 women) side effects can include: – fainting;

  • eczema;
  • inflammation of the neck of the womb (cervicitis);
  • bloating or swelling of your legs or ankles;
  • increased growth of hair on the face and body;

    • hair loss;
    • itchy skin (pruritus);
    • skin discolouration or increased skin pigment, especially on the face (chloasma).

Rare (may affect up to 1 in 1,000 women) side effects can include: – rashes, itching.

Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via Yellow Card Scheme; Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Benilexa One Handed

Store in the original package. This medicinal product does not require any special temperature storage conditions. Keep the sealed tray in the outer carton in order to protect from light. Keep the pack tightly closed. Only your doctor or healthcare provider should open this.

Keep this medicine out of the sight and reach of children.

Do not use the system after the expiry date which is stated on the label and the outer pack after EXP. The expiry date refers to the last day of that month.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information

What Benilexa One Handed contains

  • Benilexa One Handed contains 52 mg of levonorgestrel, the active substance. The hormone is contained within a substance called polydimethylsiloxane. This is surrounded by a membrane (skin) also made of polydimethylsiloxane.

What Benilexa One Handed looks like and contents of the pack

  • Benilexa One Handed consists of a small T-shaped frame made from a plastic called polyethylene. This structure provides a device for releasing the hormone gradually into the uterus (womb).
  • There are two fine threads, made of polypropylene and copper phthalocyanine blue, attached to the bottom of the frame. These allow easy removal and allow you or your doctor to check that the device is in place.

Benilexa One Handed IUS with the inserter device is individually packed into a thermoformed plastic tray with a peelable lid. Sterile tray is packed into a folding carton with the patient information leaflet and the patient reminder card.

Pack sizes:

One Intrauterine System with the inserter device.

Five Intrauterine System with the inserter device.

Multipack five packs of one Intrauterine System with one inserter device.

Not all pack sizes may be marketed.

Marketing Authorisation Holder and Manufacturer

Marketing Authorisation Holder

Gedeon Richter Plc.

Gyömrői út 19-21.

1103 Budapest

Hungary

Manufacturer

Odyssea Pharma S.A.

Rue du Travail 16

4460 Grâce Hollogne

Belgium

Gedeon Richter Plc.

Gyömrői út 19-21.

1103 Budapest

Hungary

This medicinal product is authorised in the Member States of the EEA under the following names:

Austria Levosert One

Cyprus Levosert One

Germany Levosert One

Denmark Levosert One

Spain LEVOSERT ONE 0,02 MG CADA 24 HORAS SISTEMA DE LIBERACION INTRAUTERINO

Ireland Levosert SHI

Iceland Levosertone

Italy Benilexa

Malta Levosert One

Norway Levosertone

Sweden Levosertone

Slovenia Levosert SHI

United Kingdom Benilexa One Handed

This leaflet was last revised in July 2025.

The following information is intended for medical or healthcare professionals only

Instructions for use and handling

Prescriber Check List

Ask yourself the following questions before prescribing/inserting Benilexa One Handed:

  • Have I checked that the patient’s needs meet the indications of contraception or heavy menstrual bleeding and for duration of use of up to eight years?
  • Have I completed the patient card included in the pack and given this to the patient as a reminder? (any insertions of more than eight years in duration should be reported as off label use)

Please read the following instructions for use carefully as there may be some difference in the type of inserter device compared with other IUDs you have used previously:

Insertion instructions

To be inserted by a healthcare professional using aseptic technique. It is recommended that Benilexa One Handed should only be inserted by healthcare professionals who are experienced in IUS insertions and/or have undergone sufficient training on the Benilexa One Handed insertion procedure and have read carefully these instructions before Benilexa One Handed insertion.

Benilexa One Handed is supplied in a sterile pack which should not be opened until required for insertion. Do not resterilise. For single use only. The exposed product should be handled with aseptic precautions. If the seal of the sterile package is broken, the product should be discarded (see Summary of Product Characteristics section 6.6 for disposal instructions). Do not use if the inner package is damaged or open. Do not insert after the expiry date which is stated on the carton and the tray with peelable lid after EXP. The expiry date refers to the last day of that month.

For timing of insertion, please see Summary of Product Characteristics section 4.2.

Benilexa One Handed is supplied with a patient reminder card in the outer carton. Complete the patient reminder card and give it to the patient, after insertion.

Preparation for insertion

  • Examine the patient to rule out contraindications for the insertion of Benilexa One Handed (see Summary of Product Characteristics section 4.3 and section 4.4 under Medical examination/consultation). • Insert a speculum, visualize the cervix, and then thoroughly cleanse the cervix and vagina with a suitable antiseptic solution.
  • Employ an assistant as necessary.
  • Grasp the anterior lip of the cervix with a tenaculum or other forceps to stabilize the uterus. If the uterus is retroverted, it may be more appropriate to grasp the posterior lip of the cervix. Gentle traction on the forceps can be applied to straighten the cervical canal. The forceps should remain in position and gentle counter traction on the cervix should be maintained throughout the insertion procedure.
  • Advance a uterine sound through the cervical canal to the fundus to measure the depth. If uterine depth is < 5.5 cm discontinue the procedure. Confirm the direction of the uterine cavity and to exclude any evidence of intrauterine abnormalities (e.g., septum, submucous fibroids) or a previously inserted intrauterine contraceptive which has not been removed. If difficulty is encountered, consider dilatation of the canal. If cervical dilatation is required, consider using analgesics and/or a paracervical block.

    Description

    Figure 1a: Benilexa One Handed Intrauterine Contraceptive System (IUS)

    32 mm

    T-shaped plastic frame

    Hormone reservoir with membrane

    Blue removal threads

    32 mm

    Figure 1b: Benilexa One Handed IUS with inserter

    2

    3

    1

    5

    6

    7

    8

    9

    10

    11

    12

    Benilexa One Handed IUS

    BLUE slider

    GREEN slider

    Cleft

    Insertion tube

    Flange

    Handle

    Threads

    UTAS-2 PIL_Z_Fold_72x300_720x300_temp - 2017.06.08.

    720 × 300/72 × 300 mm /Page2 BENILEXA ONE HANDED UK

    -

    2025.06.23. K-31156-1.8 RG_234 v_01

    -

    Helvetica Neue LT W1G (9 pt [9 pt])

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    Proc. Black

Figure 2: Inserter sliders

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3

1

  • Benilexa One Handed is packaged partially preloaded within the inserter. The threads are passed through the insertion tube, and exit through an opening in the handle at the cleft.
  • The handle of the inserter contains a BLUE slider labelled with the number 1 and a GREEN slider labelled with the number 2, and the handle is labelled with the number 3 to assist with the insertion process.
  • Moving the sliders achieves the positions required to complete the insertion process.

Preparation for insertion

Step 1: Opening the sterile Benilexa One Handed packaging – Remove the sealed tray containing Benilexa One Handed from the box. – Inspect the sealed tray and do not use the product if the packaging, inserter or IUS is damaged.

  • Lay the tray on a flat surface with the peel-off lid side up. – Remove peel-off lid.

Step 2: Removing inserter from tray (Figure 3)

Figure 3

  • To remove the inserter from the tray, grasp the handle below the sliders and twist gently (Figure 3).

NOTE: Do not attempt to remove the inserter by pulling on the tube

Step 3: Sliders completely forward for loading Benilexa One Handed (Figure 4)

Figure 4

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3

1

5

6

7

8

9

10

11

Maintain

forward

pressure

on the

BLUE slider

  • The BLUE slider (labelled with the number 1) has a single line marking that will align with the handle’s single line marking.
  • The GREEN slider (labelled with the number 2) has a double line marking that will align with the handle’s double line marking.
  • Grip the handle keeping your thumb or finger in the groove of the BLUE slider (over the numeral 1)

    and apply forward pressure while ensuring both

    sliders are fully forward.

Step 4: Load Benilexa One Handed into the inserter

  • Ensure the arms of the IUS are horizontal (aligned to the horizontal plane of the handle and flange); adjust the rotation of the IUS as needed using the flat sterile surface of the tray.
  • While maintaining forward pressure on the blue slider, gently pull the threads straight back to load Benilexa One Handed into the insertion tube. Ensure even tension is applied to both threads when pulling. Pull the threads upward or downward to lock the threads into the cleft at the bottom end of the handle (Figure 5); you must lock the threads in the cleft to prevent the IUS from moving out of the top of the insertion tube. Once the threads are locked in the cleft, stop holding the threads.

Figure 5: Locking the threads in cleft

  • After the IUS is loaded, continue to sustain forward pressure on the BLUE slider to maintain the correct position of the IUS.
  • When correctly loaded, the IUS is completely within the insertion tube with the tips of the arms forming a hemispherical dome at the top of the tube (Figure 6, Zoom 1).

    Figure 6: Position of the IUS in the insertion tube

    Zoom 1 Zoom 2

    The knobs of the

    lateral arms must

    be closely opposed

    to each other,

    slightly above the

    upper extremity of

    the insertion tube

    (Zoom 1).

    • If the IUS is not correctly loaded (Zoom 2), do not attempt insertion.
    • To re-load Benilexa One Handed:

      • Pull the BLUE slider back with your thumb until the groove becomes aligned with the GREEN slider to release the IUS.
      • Manually pull the threads out of the cleft. – Return the BLUE slider to the forward position and repeat the loading steps.

Step 5: Adjusting the flange (Figure 7)

Figure 7

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7

8

9

10

11

Tray notch

  • Adjust the flange to the measured uterine depth based on sounding. To adjust, place the flat side of the flange in the tray notch (Figure 7) or against a sterile edge inside of the tray. Slide the insertion tube as necessary to move the flange to the correct measurement. Ensure the flat sides of the flange are in the same horizontal plane as the handle.
  • If an adjustment to the curvature of the insertion tube is required to accommodate the anatomical orientation of the uterus, you may bend or straighten the insertion tube. When bending the tube, avoid sharp bends to prevent kinking.
  • Once the flange has been properly positioned, avoid contact with flange against objects that can change its position (e.g. tray, speculum, tenaculum, etc.).

Note: If, at any step, there is a need to touch the flange or another sterile surface, sterile gloves should be used.

Step 6: Inserting Benilexa One Handed into the uterus (Figure 8)

Figure 8

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10

11

Maintain

forward

pressure on the

BLUE slider

  • Apply gentle traction on the tenaculum and continue to apply forward pressure on the BLUE slider while inserting the loaded insertion tube through the cervical os. Advance the tube until the upper edge of the flange is

    1.5-2 cm from the external cervical os (Figure 8). Maintain forward pressure on the BLUE slider throughout the

    insertion process. – DO NOT advance flange to the cervix at this time.

  • DO NOT force the inserter. If necessary, dilate the cervical canal.

    Step 7: Releasing and opening the arms of the IUS

    Figure 9

    Move BLUE slider down

    Common slider recess

    Green slider

    should not

    move

    • Using your thumb or finger, gently slide only the BLUE slider back until you feel resistance. The BLUE and GREEN sliders will merge together to form a common slider recess. Do not move the BLUE slider any more than is necessary to create the recess. Maintain the GREEN slider so that the double line markings on the slider and the insertion handle remain aligned (Figure 9). This will allow the IUS arms to open in the lower uterine segment. Do not pull the sliders back any further as this could result in premature release of the IUS at the incorrect location.

Wait 10-15 seconds to allow for the arms of the IUS to fully open.

5

7

8

9

10

11

Figure 10: Move Benilexa One Handed into the fundal position

5

7

8

9

10

11

  • Without moving the sliders, advance the inserter until the flange touches the cervix. If fundal resistance is encountered, do not continue to advance. Benilexa One Handed is now in the fundal position (Figure 10).

Note: Fundal position is important to prevent expulsions.

Step 8: Releasing Benilexa One Handed and procedure completion

Figure 11: Releasing Benilexa One Handed from the inserter tube

5

7

8

9

10

11

2

Maintain common

slider recess while

moving the sliders

down together

  • While holding the inserter steady and maintaining its position relative to the cervix, move both sliders (BLUE and GREEN) together while maintaining the common slider recess down toward the number 3 on the handle (Figure 11) until a click is heard and the GREEN indicator at the bottom of the handle is visible (Figure 12).

Figure 12: Green indicator visible and threads released from cleft

Green indicator

  • Look at the cleft to ensure the threads were properly released (Figure 12); if not released or if a click is not heard, grasp the threads and gently pull the threads out of the cleft.

    Figure 13: Cut the threads about 3 cm from the cervix

    3 cm

    • Withdraw the inserter from the uterus.
    • Use blunt-tipped sharp scissors to cut the IUS threads perpendicular to the thread length, leaving about 3 cm outside of the cervix (Figure 13).

Note: Do not cut threads at an angle as this may leave sharp ends.

  • Do not apply tension or pull on the threads when cutting to prevent displacing the IUS.

Insertion of Benilexa One Handed is now complete.

Important information to consider during or after insertion:

  • If you suspect the IUS is not in the correct position:

    • Check insertion with an ultrasound or other appropriate radiologic test. – If incorrect insertion is suspected, remove Benilexa One Handed. Do not reinsert the same Benilexa One Handed IUS after removal.

IMPORTANT!

In case of difficult insertion and/or exceptional pain or bleeding during or after insertion, the possibility of perforation should be considered and appropriate steps should be taken, such as physical examination and ultrasound. Physical examination alone (including checking of threads) may not be sufficient to exclude partial perforation. If necessary remove the system and insert a new, sterile system.

After insertion, women should be re-examined after 4 to 6 weeks to check the threads and ensure that the device is in the correct position. Please report any case of uterine perforation or insertion difficulties via Yellow Card Scheme; Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

Removal/replacement

Benilexa One Handed is removed by gently pulling on the threads with forceps. The use of excessive force/sharp instruments during removal may cause breakage of the device. If the threads are not visible and the system is found to be in the uterine cavity on ultrasound exam, it may be removed using a narrow forceps. This may require dilatation of the cervical canal or surgical intervention.

After removal of Benilexa One Handed, the system should be examined to ensure that it is intact and has been completely removed. During difficult removals, single cases have been reported of the hormone cylinder sliding over the horizontal arms and hiding them together inside the cylinder. This situation does not require further intervention once completeness of the IUS has been ascertained. The knobs of the horizontal arms usually prevent complete detachment of the cylinder from the T-body.

K-31156-1.8, 00000000

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 04854/0179

Last revision stated in the text: July 2025 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Benilexa One Handed 20 micrograms / 24 hours Intrauterine Delivery System

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Levonorgestrel
Strength 20 micrograms / 24 hours
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Drug group (ATC)
  1. G Genito urinary system and sex hormones
    1. G02 Other gynecologicals
      1. G02B Contraceptives for topical use
        1. G02BA Intrauterine contraceptives
          1. G02BA03 plastic IUD with progestogen
Marketing authorisation PL 04854/0179

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.1.0 of 12 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.