Efficacy has not been demonstrated in hormone receptor -ve breast cancer. Tendonitis & tendon rupture may rarely occur. Measure LH, FSH &/or oestradiol levels prior to treatment in patients whose postmenopausal status is unclear. Assess bone mineral density prior to commencement of adjuvant & extended adjuvant treatment & monitor during & following treatment in women w/ history of osteoporosis &/or fractures, or who are at risk of osteoporosis. Avoid co-administration w/ tamoxifen, other anti-oestrogens or oestrogen-containing therapies. Not to be taken by patients w/ galactose intolerance, total lactase deficiency or glucose-galactose malabsorption. Insufficient data on patients w/ renal impairment (CrCl <10 mL/min); severe hepatic impairment (Child-Pugh grade C). Not recommended in childn & adolescents up to 17 yr.