LORETA 2.5 MG is a pharmaceutical product manufactured by Popular Pharmaceuticals Ltd. in Bangladesh. It contains the active ingredient Letrozole, a third-generation, non-steroidal aromatase inhibitor. Letrozole functions by inhibiting the aromatase enzyme, responsible for converting androgens into estrogens. This reduction in estrogen levels is particularly beneficial in treating hormone receptor-positive breast cancer in postmenopausal women, as many breast cancers rely on estrogen for growth. By lowering estrogen production, LORETA 2.5 MG helps to slow or stop the growth of estrogen-dependent cancer cells.