Aromasin vs Letrozole
Aromasin vs Letrozole
Aromasin and Letrozole are compared here on the things that actually differ between them: what class each belongs to, what each acts on, how each is supplied and what each costs per milligram. Where the registry has no figure for one of them the row is left out rather than filled in.
Reference only. This page covers what the compound is, how it is presented and how it is handled. It does not give dosing protocols or administration schedules, and it is not medical advice.
Side by side
| Aromasin | Letrozole | |
|---|---|---|
| Class | Steroidal (suicidal) aromatase inhibitor | Non-steroidal aromatase inhibitor |
| Acts on | 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. | A reversible competitive aromatase inhibitor, the most potent of the non-steroidal class in published suppression comparisons. |
| Supplied as | Oral tablet. | Oral tablet. |
| Half-life | Approximately 24 hours, though the irreversible mechanism outlasts the plasma half-life. | Approximately 2 days. |
| Storage | Cool, dry, dark. | Cool, dry, dark. |
| Listings | 1 | 1 |
| Price from | £35 | £25 |
What actually differs
The clearest difference is class: Aromasin is a steroidal (suicidal) aromatase inhibitor, Letrozole is a Non-steroidal aromatase inhibitor. Half-life differs as well: Approximately 24 hours, though the irreversible mechanism outlasts the plasma half-life for Aromasin against Approximately 2 days for Letrozole.
Stocked at The PED Shop
Quanta Pharma Aromasinout of stock£35
Letrozole - Pharmaout of stock£25
Availability checked 2026-09-09. The product page carries live stock.