Definition

Noun: A synthetic, non-steroidal drug that acts as an antagonist for the hormone estrogen. It is primarily used in the treatment and prevention of estrogen receptor-positive breast cancer. By blocking estrogen's effects on breast tissue, it can slow or stop the growth of cancer cells.

Usage Examples

• The oncologist prescribed a course of tamoxifen for her post-surgery treatment.
• Clinical studies have shown that tamoxifen can significantly reduce the risk of cancer recurrence.
• Patients on tamoxifen require regular monitoring for potential side effects.

Advanced Usage

• Adjuvant therapy: Tamoxifen is frequently used as adjuvant therapy, meaning it is given after primary treatments (like surgery) to lower the risk of the cancer returning.
• Chemoprevention: In high-risk individuals, tamoxifen may be used as a preventive (chemopreventive) agent to reduce the likelihood of developing breast cancer.

Variants and Related Words

• Selective Estrogen Receptor Modulator (SERM): This is the pharmacological class to which tamoxifen belongs. It is called "selective" because it blocks estrogen in some tissues (like breast) but can act like estrogen in others (like bone).
• Trade/Brand Names: Tamoxifen is often known by its original brand name, Nolvadex.

Synonyms

• Estrogen antagonist
• Anti-estrogen
• SERM (Selective Estrogen Receptor Modulator)

Related Terms and Phrases

• Hormone therapy: Tamoxifen is a form of hormone (or endocrine) therapy for cancer.
• Estrogen receptor-positive (ER+): This describes the type of breast cancer that tamoxifen is designed to treat, as the cancer cells have receptors that use estrogen to grow.
• Aromatase inhibitor: Another class of drugs used for hormone-sensitive breast cancer, often used as an alternative or follow-up treatment to tamoxifen, especially in postmenopausal women.

Noun

1. an antagonist for estrogen that is used in the treatment of breast cancer