As an orally active anti-oestrogen in the treatment of breast cancer.
For this indication, competent medicine agencies globally authorize below treatments:
20 - 40 mg
From 20 To 40 mg once every day
The recommended daily dose of tamoxifen is normally 20 mg. No additional benefit, in terms of delayed recurrence or improved survival in patients, has been demonstrated with higher doses. Substantive evidence supporting the use of treatment with 30-40 mg per day is not available, although these doses have been used in some patients with advanced disease.