Exemestane (Aromasin) 25 mg

Exemestane (Aromasin) 25 mg is Hilma Biocare's steroidal aromatase inhibitor, supplied as 30 tablets. Unlike non-steroidal inhibitors, it binds aromatase irreversibly, producing long-lasting suppression of oestrogen synthesis.

What Exemestane Is

Exemestane is a steroidal aromatase inhibitor structurally related to androstenedione, the natural substrate of the enzyme. It acts as a suicide inhibitor: the enzyme recognises it as a substrate and becomes permanently inactivated in the process. That mechanism is fundamentally different from the reversible binding of anastrozole or letrozole. The 25 mg tablet is the standard clinical strength.

The History of Aromasin

Exemestane was developed by Pharmacia and Upjohn and approved in 1999 as Aromasin for advanced breast cancer in postmenopausal women. It was later studied as adjuvant therapy in the TEAM trial, which compared it with tamoxifen and established its role in early breast cancer. Its steroidal mechanism gave it a distinct profile among aromatase inhibitors and made it a subject of long-term bone and lipid research.

How It Works

Exemestane is converted by aromatase into a reactive intermediate that covalently binds the enzyme's active site, permanently disabling it. Because the body must synthesise new aromatase to restore oestrogen production, suppression persists after the drug clears. The compound is metabolised in the liver and excreted in urine and bile. Its irreversible action is the key difference from non-steroidal inhibitors.

What the Research Shows

• The TEAM trial compared exemestane with tamoxifen in early breast cancer.
• Exemestane is established as adjuvant endocrine therapy in postmenopausal hormone-receptor-positive disease.
• Studies show sustained oestrogen suppression through irreversible enzyme inactivation.
• Long-term trials have examined its effects on bone mineral density and lipids.

Research Context

The steroidal mechanism of exemestane has consequences that show up in long-term studies. Because aromatase is permanently inactivated, the body must synthesise new enzyme to restore oestrogen production, so suppression persists after the drug clears. The TEAM trial compared five years of exemestane with tamoxifen and found comparable efficacy with a different side-effect profile. Bone loss and joint symptoms were more pronounced with exemestane, while thromboembolic events were less common than with tamoxifen. Those trade-offs are a central theme in aromatase-inhibitor research.

Strength, Pack and Authentication

The pack contains 30 tablets of 25 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 can be checked against Hilma Biocare's records. Each tablet delivers a consistent 25 mg dose.

Buying Aromasin Online

Aromasin is one of the most searched steroidal aromatase inhibitors. If you are researching exemestane, comparing Aromasin 25 mg products or looking to buy exemestane online from a trusted Hilma Biocare supplier, this page gives you the full specification, pack size, price and live stock status. Browse more Hilma Biocare hormone-support products at NotNatty.