Antagon Side Effects

Generic Name: ganirelix

Please note - some side effects for Antagon may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

Side Effects by Body System

Genitourinary

Genitourinary symptoms of abdominal pain (4.8%), ovarian hyperstimulation (2.4%), and vaginal bleeding (1.8%) have been reported.

Nervous system

Nervous systems side effects have been limited to headache in 3% of patients.

Local

Local side effects have included non-specific injection site reactions (1.1%).

Gastrointestinal

Gastrointestinal side effects of nausea and abdominal pain have occurred in 1.1% and 1% of patients, respectively.

Other

Follow-up studies of 282 newborns revealed 3 neonates with major and 18 with minor congenital anomalies. The major anomalies included hydrocephalus/meningocele, omphalocele, and Beckwith-Wiedemann Syndrome. Minor dermal, skeletal, muscular, and organ (angioma, hernia , testes, and renal) anomalies were reported.

Neonatal congenital anomalies have been reported. The causal relationship of the anomalies and ganirelix therapy is unknown. Multiple factors may confound assisted reproductive procedures.

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