Hi, Stimufol contains letrozole which is used alone or with other treatments like surgery or radiation to treat early breast cancer in postmenopausal women. It can also be used as the first line treatment of advanced breast cancer that has spread within the breast or to other areas of the body. Side effects of Stimufol are hot flashes, fatigue, hypercholesterolemia, dizziness, increased sweating, headache, back pain, constipation, increased thirst, chest pain, bone fracture etc. Clome 50 mg contains clomiphene which is used to treat female infertility. It is used in women who are unable to become pregnant due to ovulation problems or suffering from polycystic ovarian syndrome (PCOS). Side effects of Clome are nausea, vomiting, bloating, headache, hot flashes, menorrhagia, breast discomfort, blurred vision etc. Letroz also contains letrozole as like as Stimufol that has already described. Siphene contains clomiphene too as like as Clome which has already narrated. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician,