The possible side effects of Clomid include:
tenderness of the pectoral muscle
acceleration of prostate cancer growth (if cancer is already present)
changes in your vision that are caused by a swelling of the pituitary gland (rare)
The side effects of Clomid are typically reversible if you stop taking the drug. If you experience any of the side effects listed above while taking Clomid, you should stop taking Clomid and contact your doctor.