A pessary used to soften and open the cervix and in medical termination
Gemeprost
A prostaglandin pessary used to soften and open the cervix and as part of medical termination of pregnancy, given in hospital.
What is Gemeprost?
Gemeprost is a prostaglandin given as a pessary placed in the vagina. It is used to soften and open the cervix (the neck of the womb) before some gynaecological procedures and as part of medical termination of pregnancy. It works by making the womb contract and the cervix soften and open. Because of this, it commonly causes strong, period-like cramping pain, along with stomach upset such as nausea, vomiting or diarrhoea, and it can lower blood pressure, so it is used under hospital supervision.
Education and reference only. This is a plain-language guide to Gemeprost — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Gemeprost is a medicine in the prostaglandin group, given as a pessary that is placed high in the vagina. It is used in gynaecology to soften and open the cervix, the neck of the womb, before certain procedures, and as part of the medical termination of a pregnancy. Because it acts on the womb and cervix and can have strong effects, it is used in a hospital setting under the supervision of a specialist team, who give it and monitor the woman while it works.
How it works
Gemeprost acts like a natural prostaglandin, the body's own chemical messengers that help the womb contract and the cervix soften. Placed in the vagina, it makes the muscle of the womb tighten in waves, similar to contractions, and helps the cervix become softer and more open. This is what allows the cervix to open before a procedure, or helps the womb empty during a medical termination. The same actions are the reason it commonly causes cramping pain and other effects, and why it is used under close supervision.
Company & origin
Originated / developed by: Specialist manufacturer.
A specialist prostaglandin pessary used in the UK to soften and open the cervix and as part of medical termination of pregnancy, given under hospital care.
Practical use
How to take Gemeprost
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given as a pessary placed high in the vagina by a healthcare professional in hospital.
- Expect strong, period-like cramping; ask the team for pain relief, which is usually offered.
- Stay where the team can monitor you, as gemeprost can lower blood pressure and cause dizziness.
- Tell staff straight away about very heavy bleeding, severe pain or feeling faint or very unwell.
- Follow the team's instructions on rest, eating and what to expect at each stage.
Weighing it up
Advantages & disadvantages of Gemeprost
Advantages
- Effectively softens and opens the cervix and helps the womb contract when this is needed.
- Given as a pessary in hospital, where the woman can be supported and monitored.
- A well-established option used as part of medical termination and before some procedures.
Disadvantages
- Commonly causes strong, period-like cramping pain.
- Often causes stomach upset such as nausea, vomiting or diarrhoea, and vaginal bleeding.
- Can lower blood pressure and cause dizziness or flushing, so hospital supervision is needed.
Practical use
Good to know
It helps to know what to expect with gemeprost. Because it makes the womb contract, strong, period-like cramping pain is very common and expected, and pain relief is usually offered to help with this. Stomach upset such as nausea, being sick or diarrhoea is also common, as is some vaginal bleeding. It can lower blood pressure and occasionally cause dizziness or flushing, which is one reason it is given in hospital where you can be monitored and rest. The team will explain what is happening at each stage and will watch how things progress. Any very heavy bleeding, severe pain or feeling very unwell should be reported to staff straight away so they can help.
Who should not take it / use with caution
- People who have had a serious allergic reaction to gemeprost or similar prostaglandins should not be given it.
- It is used with caution in people with certain heart, circulation or other medical conditions, decided by the specialist team.
- It is given only under hospital supervision by a specialist team.
Monitoring
- Monitoring pain, bleeding and how the procedure or termination is progressing.
- Checking blood pressure and watching for dizziness, faintness or flushing.
- Watching for very heavy bleeding or signs of feeling very unwell that need prompt action.
Side effects
- Strong, period-like cramping pain in the lower tummy.
- Nausea, vomiting or diarrhoea.
- Vaginal bleeding.
- A drop in blood pressure, with dizziness, flushing or feeling faint; rarely, more serious effects needing urgent care.
Key interactions
- It is used alongside other medicines in termination or procedures only as directed by the specialist team.
- Tell the team about all your medicines and health conditions before it is given.
- Medicines that affect blood pressure may add to its blood-pressure-lowering effect, so the team takes this into account.
Available as: A pessary placed in the vagina, used in hospital.
Answers
Gemeprost: frequently asked questions
What is gemeprost used for?
It is a prostaglandin pessary used to soften and open the cervix before some gynaecological procedures and as part of medical termination of pregnancy.
How does it work?
It acts like the body's own prostaglandins, making the womb contract and the cervix soften and open, which is why it is used for these purposes.
Will it be painful?
Strong, period-like cramping pain is very common and expected, so pain relief is usually offered to help you through it.
Why is it given in hospital?
It can cause strong cramping, bleeding and a drop in blood pressure, so it is given under hospital supervision where you can be monitored and supported.
What should I tell staff about?
Tell staff straight away about very heavy bleeding, severe pain, or feeling faint or very unwell, so they can help you quickly.
Authoritative sources
- BNF
- NICE CKS
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