Headache, nausea, vomiting, mild stomach/abdominal pain, bloating, redness/pain at the injection site, or breast tenderness/pain may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if any of these unlikely but serious side effects occur: unusual bleeding from the vagina/uterus, pain/redness/swelling of the calf muscles, cold/numb/pale skin of the arms/legs/hands/feet, swelling of ankles/hands/feet.
Seek immediate medical attention if any of these rare but very serious side effects occur: weakness on one side of the body, slurred speech, vision changes, sudden severe headache, chest pain, shortness of breath.
This medication may cause a condition known as ovarian hyperstimulation syndrome (OHSS). This condition may occur during treatment and after treatment has been stopped. Rarely, serious OHSS causes fluid to suddenly build up in the stomach, chest, and heart area. Seek immediate medical attention if you develop the following side effects: severe pain or swelling in the lower abdominal (pelvic) area, severe nausea/vomiting, sudden/rapid weight gain, difficult/painful breathing, change in the amount of urine.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.