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Cetrotide (cetrorelix) is a gonadotropin-releasing hormone with antagonistic (blocking) activity. Cetrotide is used to prevent premature ovulation/LH (luteinizing hormone) surge in women undergoing controlled ovarian stimulation. The Cetrotide 0.25mg is a daily dose given for a number of days to be determined by your physician. The Cetrotide 3mg (single dose) controls the LH surge for up to 4 days.


A GnRH antagonist, which blocks GnRH receptors on the pituitary gonadotropin pathway. It induces a rapid, reversible suppression of gonadotropin secretion.The vials of Cetrotide contain 0.25mg and 3mg of powdered medication packaged with prefilled syringes of diluent.

How It Works:

Cetrotide is an injectable medication administered subcutaneously. Cetrotide blocks the effect of the naturally occurring gonadotropin releasing hormone (GnRH). GnRH controls the release of LH that produces the release of an egg from the ovary. Cetrotide is given over a short period of time in the cycle when the LH surge can occur. Its blocking effect allows for eggs to reach the level of development needed for fertilization.

Potential Side Effects:

Some women may experience headache, abdominal pain and nausea, and injection site reactions (redness, bruising, itching or swelling)

If you experience an allergic reaction: difficulty breathing; closing of your throat; swelling of your lips, tongue or face; or hives; seek emergency medical attention immediately.

PLEASE NOTE: If these or any other side effects occur, contact your physician.


Store 3mg Cetrotide at room temperature. Protect from light. • Cetrotide 0.25mg must be refrigerated.

Injection Instructions

For more product details or more detailed injection information please see
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