What Aromasin is
Aromasin is a steroidal (suicidal) aromatase inhibitor. A steroidal aromatase inhibitor that binds the enzyme irreversibly, so activity returns only as new enzyme is synthesised. This distinguishes it from the reversible non-steroidal inhibitors.
Class and mechanism
Aromasin is a steroidal (suicidal) aromatase inhibitor. A steroidal aromatase inhibitor that binds the enzyme irreversibly, so activity returns only as new enzyme is synthesised. This distinguishes it from the reversible non-steroidal inhibitors.
Where it sits
Post-cycle and hormonal support compounds fall into two families that are often confused: SERMs act at the oestrogen receptor, aromatase inhibitors reduce the conversion of androgens to oestrogen upstream.
Other names
Aromasin is also written as Exemestane. The same molecule appears under more than one name, which is worth knowing when comparing listings between suppliers.
Others in the post-cycle and hormonal support range
Aromasin sits in the post-cycle and hormonal support group. The compounds below share that grouping, which is the useful starting point when comparing one against another: same group means the comparison is like for like, different group usually means it is not.
| Compound | Class | Listings | From |
|---|---|---|---|
| Tamoxifen | Selective oestrogen receptor modulator (SERM) | 2 | £22 |
| HCG | Gonadotropin analogue | 2 | £25 |
| Clomid | Selective oestrogen receptor modulator (SERM) | 1 | £22 |
| Arimidex | Non-steroidal aromatase inhibitor | 1 | £25 |
| Letrozole | Non-steroidal aromatase inhibitor | 1 | £25 |
| HMG | Gonadotropin preparation | 1 | £35 |
Is it held in UK stock?
Stock held in the UK ships domestically, with no customs step. The product page carries live stock rather than a cached figure.
Quanta Pharma Aromasinout of stock£35
Availability checked 2026-09-09. The product page carries live stock.