ganirelix at a glance
Medicine class
GnRH antagonist
Usual role
Prevents a premature luteinising hormone surge during controlled ovarian stimulation
Administration
Injection under the skin, preferably in the upper leg
Prescriber
A specialist experienced in infertility treatment
What is ganirelix used for?
Ganirelix is licensed for controlled ovarian stimulation in assisted reproduction.
Prevention of premature luteinising hormone surges in women undergoing controlled ovarian hyperstimulation.
How does ganirelix work?
Ganirelix blocks GnRH receptors in the pituitary gland. This rapidly and reversibly reduces luteinising hormone and follicle-stimulating hormone release, helping prevent an untimely hormone surge and egg release.
ganirelix preparations and strengths
Injection
Route: Parenteral
Strengths: 0.25 mg/0.5 mL
How to take ganirelix
Use ganirelix exactly as instructed by the fertility clinic. It is injected slowly into the fatty layer under the skin, preferably in the upper leg. You or a partner may administer it after suitable training.
Vary the injection site.
Check that the solution is clear and particle-free and the syringe is undamaged.
Do not remove the expected air bubble from the pre-filled syringe.
Do not mix it with another medicine; use separate injection sites.
Use each syringe once and place it in a sharps container.
ganirelix side effects
Common or expected effects
- Injection-site redness, sometimes with swelling, is very common and usually short-lived.
- Headache, nausea or feeling generally unwell are uncommon.
Get urgent medical advice
- A very rare severe allergic reaction, including facial or throat swelling, breathing difficulty, hives or anaphylaxis.
- Ovarian hyperstimulation syndrome can occur as a complication of ovarian-stimulation treatment.
- Severe or one-sided abdominal symptoms may indicate ovarian hyperstimulation syndrome or an ectopic pregnancy and require urgent assessment.
ganirelix in pregnancy
Ganirelix is used before pregnancy and is contraindicated during pregnancy. If pregnancy is suspected, contact the fertility clinic before another injection.
ganirelix while breastfeeding
Ganirelix is contraindicated while breastfeeding because it is unknown whether it passes into breast milk. Discuss feeding plans with the fertility specialist before treatment.
ganirelix interactions
Formal interaction studies have not been performed. Tell the fertility team about all medicines, supplements and herbal products.
Histamine-releasing medicines
An interaction cannot be excluded; the fertility specialist should review concurrent treatment.
Common questions about ganirelix
Answers are fully visible for fast scanning and source review.
Why is ganirelix used during IVF?
It prevents a premature luteinising hormone surge that could release eggs before planned collection.
Does ganirelix stimulate the ovaries?
No. Other fertility medicines stimulate follicle growth; ganirelix blocks the hormone signal that could trigger premature egg release.
Is ganirelix the IVF trigger injection?
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.