Nolvadex (tamoxifen) is a prescription drug intended for the treatment of breast cancer in women that have been treated with radiotherapy and surgery. It also helps women that belong to the high risk groups to reduce the probability of developing breast cancer. Do not plan to become pregnant during the treatment of for 2 months after it. Make sure to use a reliable method of birth control throughout the entire period of treatment to avoid a pregnancy. You need to consider taking a non-hormonal method of birth control to provide for maximum efficiency, so your health care provider will be able to provide professional advice. If you think you may have become pregnant talk to your doctor as soon as possible to discuss the possibility of stopping your treatment with Nolvadex. You are also not supposed to breastfeed during your treatment. Some of the side effects sometimes reported by patients taking Nolvadex include but are not limited to hot flashes, dizziness, increased tumor pain, thinning of hair, constipation, loss of sexual desire, headache, tiredness, weight loss, depression, stomach cramps, and nausea. If you have any questions about the medicine of about your treatment please contact your doctor or your pharmacist.