Current stock purity 99.53% tested on 2022/08/13

Currently produced in 20mg Capsules. Quantity per container will vary per distributor.

Tamoxifen, sold under the brand name Nolvadex among others, is a selective estrogen receptor modulator used to prevent breast cancer in women and treat breast cancer in women and men.[11] It is also being studied for other types of cancer.[11] It has been used for Albright syndrome. Tamoxifen is typically taken daily by mouth for five years for breast cancer.

Serious side effects include a small increased risk of uterine cancer, stroke, vision problems, and pulmonary embolism. Common side effects include irregular periods, weight loss, and hot flashes. It may cause harm to the baby if taken during pregnancy or breastfeeding. It is a selective estrogen-receptor modulator (SERM) and works by decreasing the growth of breast cancer cells. It is a member of the triphenylethylene group of compounds.

Tamoxifen was initially made in 1962, by chemist Dora Richardson. It is on the World Health Organization's List of Essential Medicines. Tamoxifen is available as a generic medication.[In 2017, it was the 251st most commonly prescribed medication in the United States, with more than one million prescriptions.

Tamoxifen is used to prevent and treat gynecomastia. It is taken as a preventative measure in small doses, or used at the onset of any symptoms such as nipple soreness or sensitivity. Other medications are taken for similar purposes such as clomifene and the anti-aromatase drugs which are used in order to try to avoid the hormone-related adverse effects.