Anastrozole (Arimidex) 1 mg

Anastrozole (Arimidex) 1 mg is Hilma Biocare's third-generation non-steroidal aromatase inhibitor, supplied as 50 tablets. It blocks the conversion of androgens to oestradiol and is one of the most researched oestrogen-control compounds in the world.

What Anastrozole Is

Anastrozole is a selective non-steroidal aromatase inhibitor that binds the aromatase enzyme reversibly and with high affinity. Aromatase is responsible for converting testosterone and other androgens into oestradiol, so inhibiting it lowers circulating oestrogen. Anastrozole is orally active, well absorbed and does not affect other steroidogenic enzymes at therapeutic concentrations. The 1 mg tablet is the standard clinical strength.

The History of Arimidex

Anastrozole was developed by Zeneca and approved in 1995 as Arimidex for advanced breast cancer in postmenopausal women. It became a landmark drug when the ATAC trial, reported in the early 2000s, showed it was superior to tamoxifen for disease-free survival in early breast cancer. That trial established anastrozole as a first-line endocrine therapy and cemented the role of aromatase inhibitors in modern oncology.

How It Works

Anastrozole competes with the natural substrate at the aromatase active site, reducing oestradiol synthesis in peripheral tissue and fat. Because it is non-steroidal, it binds reversibly and does not permanently inactivate the enzyme. The reduction in oestrogen removes negative feedback on the pituitary, which can raise gonadotropins. Anastrozole is metabolised in the liver and excreted mainly in urine, with a half-life of around 40 to 50 hours.

What the Research Shows

• The ATAC trial compared anastrozole with tamoxifen in early breast cancer and changed clinical practice.
• Anastrozole is used as adjuvant endocrine therapy in postmenopausal hormone-receptor-positive breast cancer.
• Studies show substantial suppression of circulating oestradiol at standard doses.
• Long-term trials have characterised its effects on bone density and lipids.

Research Context

Anastrozole is often compared with steroidal inhibitors in the literature, and the difference matters. Because it binds reversibly, enzyme activity returns once the drug clears, whereas exemestane inactivates aromatase permanently. Studies of long-term adjuvant use have also documented reductions in bone mineral density, which is why bone health is a recurring endpoint in aromatase-inhibitor research. The ATAC follow-up analyses showed that the benefit of anastrozole persisted for years after treatment ended, a finding that shaped how researchers think about the durability of oestrogen suppression.

Strength, Pack and Authentication

The pack contains 50 tablets of 1 mg each, sealed in moisture-resistant blister strips inside a printed carton. The carton states the compound, strength and tablet count, and a scratch-off security code inside the box links the pack to Hilma Biocare's records. Each tablet is manufactured to a consistent 1 mg dose.

Buying Anastrozole Online

Arimidex is one of the most searched aromatase inhibitors. If you are researching anastrozole, comparing Arimidex 1 mg products or looking to buy anastrozole online from a trusted Hilma Biocare supplier, this page gives you the complete specification, pack size, price and live stock status. Browse more Hilma Biocare hormone-support products at NotNatty.