Elonva Special Precautions

Infertility Evaluation Before Starting Treatment: Before starting treatment, the couple's infertility should be assessed as appropriate. In particular, the woman should be evaluated for hypothyroidism, adrenocortical insufficiency, hyperprolactinemia and pituitary or hypothalamic tumors, and appropriate specific treatment given. Medical conditions that contraindicate pregnancy should also be evaluated before starting treatment with Elonva.
Dosing During the Stimulation Cycle: Elonva is intended for single subcutaneous injection only. Additional injections of Elonva should not be given within the same treatment cycle. (See also Dosage & Administration).
After administration of Elonva, no additional FSH-containing product should be administered prior to stimulation day 8 (see also Dosage & Administration).
Renal Insufficiency: In patients with renal insufficiency the excretion of corifollitropin alfa may be reduced (see Dosage & Administration and Pharmacology: Pharmacokinetics under Actions). Therefore, the use of Elonva in these women is not recommended.
Not Recommended with a GnRH Agonist Protocol: There are limited data on the use of Elonva in combination with a GnRH agonist. Therefore, the use of Elonva is not recommended in combination with a GnRH agonist (see also Dosage & Administration).
Ovarian Hyperstimulation Syndrome (OHSS): OHSS is a medical event distinct from uncomplicated ovarian enlargement. Clinical signs and symptoms of mild and moderate OHSS are abdominal pain, nausea, diarrhea, mild to moderate enlargement of ovaries and ovarian cysts. Severe OHSS may be life-threatening. Clinical signs and symptoms of severe OHSS are large ovarian cysts, acute abdominal pain, ascites, pleural effusion, hydrothorax, dyspnea, oliguria, hematological abnormalities and weight gain. In rare instances, venous or arterial thromboembolism may occur in association with OHSS. Transient liver function test abnormalities suggestive of hepatic dysfunction with or without morphologic changes on liver biopsy have also been reported in association with OHSS.
OHSS may be caused by administration of human Chorionic Gonadotropin (hCG) and by pregnancy (endogenous hCG). Early OHSS usually occurs within 10 days after hCG administration and may be associated with an excessive ovarian response to gonadotropin stimulation. Late OHSS occurs more than 10 days after hCG administration, as a consequence of the hormonal changes with pregnancy. Because of the risk of developing OHSS, patients should be monitored for at least two weeks after hCG administration.
Women with known risk factors for a high ovarian response may be especially prone to the development of OHSS during or following treatment with Elonva. For women having their first cycle of ovarian stimulation, for whom risk factors are only partially known, close observation for early signs and symptoms of OHSS is recommended.
Follow current clinical practice for reducing the risk of OHSS during Assisted Reproductive Technology (ART). Adherence to the recommended Elonva dose and treatment regimen and careful monitoring of ovarian response is important to reduce the risk of OHSS. To monitor the risk of OHSS, ultrasonographic assesments of follicular development should be performed prior to treatment and at regular intervals during treatment; the concurrent determination of serum estradiol levels may also be useful. In ART there is an increased risk of OHSS with 18 or more follicles of 11 mm or more in diameter. If OHSS develops, standard and appropriate management of OHSS should be implemented and followed.
Ovarian Torsion: Ovarian torsion has been reported after treatment with gonadotropins, including Elonva. Ovarian Torsion may be related to other conditions, such as OHSS, pregnancy, previous abdominal surgery, past history of ovarian torsion, and previous or current ovarian cysts. Damage to the ovary due to reduced blood supply can be limited by early diagnosis and immediate detorsion.
Multi-fetal Gestation and Birth: Multiple pregnancies and births have been reported for all gonadotropin treatments, including Elonva. The woman and her partner should be advised of the potential risks for the mother (pregnancy and delivery complications) and the neonate (low birth weight) before starting treatment. In women undergoing ART procedures the risk of multiple pregnancy is mainly related to the number of embryos transferred.
Ectopic Pregnancy: Infertile women undergoing ART, have an increased incidence of ectopic pregnancies. It is important to have early ultrasound confirmation that a pregnancy is intrauterine, and to exclude the possibility of extrauterine pregnancy.
Congenital Malformations: The incidence of congenital malformations after ART may be slightly higher than after spontaneous conceptions. This is thought to be due to differences in parental characteristics (e.g., maternal age, sperm characteristics) and the higher incidence of multiple pregnancies.
Ovarian and Other Reproductive System Neoplasms: There have been reports of ovarian and other reproductive system neoplasms, both benign and malignant, in women who have undergone multiple treatment regimens for infertility treatment. It is not established whether or not treatment with gonadotropins increases the risk of these tumors in infertile women.
Vascular Complications: Thromboembolic events, both in association with and separate from OHSS, have been reported following treatment with gonadotropins, including Elonva. Intravascular thrombosis, which may originate in venous or arterial vessels, can result in reduced blood flow to vital organs or the extremities. In women with generally recognized risk factors for thromboembolic events, such as a personal or family history, severe obesity or thrombophilia, treatment with gonadotropins including Elonva, may further increase this risk. In these women the benefits of gonadotropin administration including Elonva, need to be weighed against the risks. It should be noted, however, that pregnancy itself also carries an increased risk of thrombosis.
Effects on ability to drive and use machines: No studies on the ability to drive and use machines have been performed.
Elonva may cause dizziness. Women should be advised that if they feel dizzy, they should not drive or use machines.