cetrorelix acetate at a glance
Medicine class
Gonadotropin-releasing hormone antagonist
Usual role
Prevents premature ovulation during controlled ovarian stimulation before egg collection
Administration
Injected under the skin of the lower abdomen after mixing the powder with the supplied solvent
Storage
Keep refrigerated and protected from light; allow it to reach room temperature before preparation
What is cetrorelix acetate used for?
It is licensed for:
Preventing premature ovulation during controlled ovarian stimulation followed by egg collection and assisted reproductive techniques.
How does cetrorelix acetate work?
Cetrorelix blocks gonadotropin-releasing hormone receptors in the pituitary gland. This reduces luteinising hormone and follicle-stimulating hormone release, delaying the luteinising hormone surge and ovulation. The effect is reversible after treatment stops.
How to take cetrorelix acetate
Use it exactly as instructed by the fertility clinic. The first injection should be medically supervised; later injections may be self-administered after training.
Inject under the skin of the lower abdomen and rotate injection sites.
Use only the supplied solvent. Swirl gently to dissolve the powder; do not shake.
Use only a clear, particle-free solution and inject it immediately after preparation.
Use each vial, syringe and needle once, then place sharps in the recommended disposal container.
cetrorelix acetate side effects
Common or expected effects
- Temporary redness, swelling or itching at the injection site
- Mild to moderate ovarian hyperstimulation syndrome associated with ovarian stimulation
Get urgent medical advice
- Systemic allergic or anaphylactic reaction, including hives, throat or tongue swelling, wheezing, severe breathing difficulty, dizziness or collapse
- Severe ovarian hyperstimulation syndrome, which may cause marked abdominal swelling or pain, vomiting, reduced urine, rapid weight gain, chest fluid or breathing difficulty
cetrorelix acetate in pregnancy
Cetrorelix acetate is contraindicated during pregnancy and is not intended for use once pregnancy has occurred. Tell the fertility clinic before further use if pregnancy is suspected.
cetrorelix acetate while breastfeeding
Cetrorelix acetate is contraindicated during breastfeeding. Discuss feeding plans with the fertility specialist before treatment.
cetrorelix acetate interactions
Formal interaction studies have not been performed. Clinicians should review all prescribed, non-prescribed and herbal products.
Gonadotropins
An interaction cannot be completely excluded. These are used within a specialist-controlled stimulation protocol requiring ovarian-response and ovarian hyperstimulation syndrome monitoring.
Medicines that may release histamine
An interaction cannot be completely excluded in susceptible patients, so allergy history and symptoms require particular attention.
Common questions about cetrorelix acetate
Answers are fully visible for fast scanning and source review.
Why is cetrorelix acetate used during IVF treatment?
It prevents the natural hormone surge that could release eggs before the fertility team collects them.
Does cetrorelix acetate stimulate the ovaries?
No. It suppresses the hormone signal that triggers ovulation and is used alongside separate ovarian-stimulation medicines.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.