What is the usual daily dose of tamoxifen in this setting?

What is the usual daily dose of tamoxifen in this setting?

• A. 20 mg
• B. 10 mg
• C. 40 mg
• D. 80 mg

Answer: (A)

Tamoxifen is a selective estrogen receptor modulator used to block estrogen effects in breast tissue. The usual daily dose is 20 mg taken by mouth once daily. This fixed dose was established in trials as the balance point between effective receptor modulation and tolerable side effects. A lower dose, like 10 mg daily, would be subtherapeutic for disease control, while higher doses such as 40 mg or 80 mg increase the risk of adverse effects without providing extra benefit. In standard adjuvant therapy and for prevention in high-risk individuals, 20 mg daily remains the typical regimen.

Tamoxifen is a selective estrogen receptor modulator used to block estrogen effects in breast tissue. The usual daily dose is 20 mg taken by mouth once daily. This fixed dose was established in trials as the balance point between effective receptor modulation and tolerable side effects. A lower dose, like 10 mg daily, would be subtherapeutic for disease control, while higher doses such as 40 mg or 80 mg increase the risk of adverse effects without providing extra benefit. In standard adjuvant therapy and for prevention in high-risk individuals, 20 mg daily remains the typical regimen.