Anastrozole is a medicine used to treat hormone-positive breast cancer, mainly in postmenopausal women. It works by lowering estrogen levels in the body, helping slow or stop the growth of cancer cells that depend on estrogen.

Anastrozole is not chemotherapy. It is a hormone (endocrine) therapy and is usually taken for long-term treatment as advised by a doctor.
Uses of Anastrozole
Anastrozole is used for:

Estrogen receptor-positive (ER+) breast cancer
Early-stage breast cancer after surgery
Advanced or metastatic breast cancer
Preventing cancer recurrence in postmenopausal women

How Anastrozole Works
Anastrozole belongs to a group of medicines called aromatase inhibitors.

It works by:

Blocking aromatase, an enzyme that helps make estrogen
Lowering estrogen levels in the body
Slowing or stopping the growth of estrogen-dependent cancer cells

How to Take Anastrozole

Take Anastrozole exactly as prescribed by your doctor
Usually taken once daily, with or without food
Swallow the tablet whole with water
Take it at the same time every day

Do not crush or chew the tablet.
Common Side Effects
Some people may experience:

Hot flashes
Joint or muscle pain
Weakness or tiredness
Headache
Nausea
Mood changes

These side effects are common and often manageable with medical support.
Serious Side Effects (Seek Medical Help)

Bone thinning or fractures
High cholesterol levels
Severe joint pain
Chest pain or shortness of breath

Safety Precautions

Pregnancy: Not safe during pregnancy
Breastfeeding: Not recommended
Bone Health: Bone density may need monitoring
Liver: Inform your doctor if you have liver problems
Heart: Caution in patients with heart disease

Drug Interactions
Tell your doctor about all medicines you take. Anastrozole may interact with:

Estrogen-containing medicines
Hormone replacement therapy (HRT)
Tamoxifen

These can reduce Anastrozole’s effectiveness.
Storage Instructions

Store below 30°C
Keep away from moisture and sunlight
Keep out of reach of children
Do not use expired tablets

FAQs
Q1. What is Anastrozole used for?
It is used to treat hormone-positive breast cancer in postmenopausal women.

Q2. Is Anastrozole chemotherapy?
No. It is a hormone therapy, not chemotherapy.

Q3. How long is Anastrozole taken?
It is often taken for 5 years or as advised by the doctor.

Q4. Can Anastrozole cause bone loss?
Yes. Long-term use may weaken bones, so monitoring is important.
Fact Box

Drug Name: Anastrozole
Drug Class: Aromatase inhibitor
Used For: Hormone-positive breast cancer
Dose: Once daily