GnRH Antagonist (Fertility Hormone Blocker)
Last reviewed July 2026
Who is this for?
Cetrorelix is an injectable hormone-blocking medicine that stops your body from releasing eggs too early during fertility treatment by blocking a natural hormone called GnRH that controls ovulation.
Binds competitively to GnRH receptors on pituitary gonadotroph cells, blocking endogenous GnRH signaling and rapidly suppressing LH and FSH secretion to prevent premature ovulation during controlled ovarian hyperstimulation.
Prevention of premature ovulation during assisted reproduction (IVF or fertility treatment)
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
If you miss a dose, contact your fertility doctor immediately for guidance, as timing is very important during IVF treatment, and a missed dose could affect your cycle.
Only use this medicine under the supervision of a qualified fertility specialist and do not buy from unverified sources or roadside sellers. The brand available in Nigeria is Ietrocare Injection, so make sure it has been properly stored in cold conditions before purchasing. Never share this medicine with anyone else, even if they are also doing fertility treatment.
Tell your fertility doctor about all medicines you are taking, especially other hormone medications or fertility drugs. Avoid herbal supplements and traditional medicines during your IVF cycle without consulting your doctor, as they may interfere with the treatment.
Check your specific combination
Is it safe to take Cetrorelix with your other drugs?
Cetrorelix should not be used if you are already pregnant or breastfeeding, as it is only used before conception during fertility treatment.
Store in a refrigerator (2–8°C) before mixing. In Nigerian weather, do not leave it out in the heat or direct sunlight. Once mixed, use it immediately. Keep away from children and store in the original packaging.
For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under, especially in Nigerian and West African pharmacies
Tap a brand for packaging, NAFDAC details and authenticity check
Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.