Stomach upset, bloating, abdominal/pelvic fullness, flushing ("hot flashes"), breast tenderness, headache, or dizziness may occur. If any of these effects persist or worsen, notify 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 immediately if any of these unlikely but serious side effects occur: abnormal vaginal bleeding, mental/mood changes.
Vision changes (e.g., blurred vision, seeing spots or flashes) may sometimes occur during clomiphene treatment, especially if you are exposed to bright light. These side effects usually go away a few days or weeks after treatment is stopped. However, in rare cases, vision changes may be permanent. Get medical help right away if any of the following occur: vision problems/changes, eye pain.
This medication may cause a condition known as ovarian hyperstimulation syndrome (OHSS). Rarely, serious OHSS causes fluid to suddenly build up in the stomach, chest, and heart area. This may occur during therapy or after treatment has been stopped. Get medical help right away if you develop any of the following side effects: severe pain/swelling in the lower abdomen (pelvic) area, sudden/rapid weight gain, nausea/vomiting, diarrhea, shortness of breath, change in the amount of urine, pain/redness/swelling of the legs, chest pain, fast/irregular heartbeat.
A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: 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.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.