Active Ingredient

Anastrozole

Anastrozole is a medication commonly used in certain types of cancer treatments. It is primarily prescribed for postmenopausal women.

This ingredient helps to manage hormone levels in the body, which can be crucial in treating hormone-sensitive conditions.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Anastrozole Brands

Arimidex

Strengths 1mg

Altraz

Strengths 1mg

Anastrozole Uses

Anastrozole is typically used in the management of hormone-related conditions. It is especially relevant for certain cancer treatments.

Treatment of hormone receptor-positive breast cancer in postmenopausal women.
Management of advanced breast cancer that has progressed following other treatments.
Sometimes used in the prevention of breast cancer in high-risk patients.

How Anastrozole Works

Anastrozole works by reducing the amount of estrogen in the body. It achieves this by inhibiting an enzyme called aromatase, which is involved in estrogen production.

By lowering estrogen levels, it helps slow or stop the growth of certain breast cancer cells that require estrogen to grow.

Common side effects of Anastrozole

Not everyone experiences side effects with Anastrozole, and many side effects are mild and temporary.

Hot flashes
Weakness
Joint pain
Nausea
Headache
Osteoporosis
Insomnia

If you experience serious or persistent symptoms, consult your doctor.

Frequently Asked Questions

What is Anastrozole used for?

Anastrozole is used to treat certain types of breast cancer in postmenopausal women, particularly hormone receptor-positive breast cancer.

How does Anastrozole work?

It works by lowering estrogen levels in the body, which can slow the growth of certain breast cancer cells.

Can men use Anastrozole?

While primarily used in women, Anastrozole may be prescribed off-label for certain conditions in men. Always follow the advice of a healthcare provider.

Are there any dietary restrictions while taking Anastrozole?

There are no specific dietary restrictions, but maintaining a healthy diet can support overall health during treatment.

Can Anastrozole cause bone problems?

Yes, Anastrozole can affect bone density, so monitoring bone health is important. Discuss with your doctor if you have concerns.