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Selective Estrogen Receptor Modulator

Meaning

A Selective Estrogen Receptor Modulator (SERM) is a class of compounds that acts as either an agonist or an antagonist on estrogen receptors in a tissue-specific manner. Unlike pure agonists or antagonists, SERMs exhibit differential activity, meaning they may activate estrogen receptors in bone and the liver while simultaneously blocking them in breast or uterine tissue. This selective action allows for targeted therapeutic benefits, such as preserving bone density without stimulating proliferative changes in sensitive tissues.