Arimidex vs Letrozole
Arimidex vs Letrozole
Arimidex 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
| Arimidex | Letrozole | |
|---|---|---|
| Class | Non-steroidal aromatase inhibitor | Non-steroidal aromatase inhibitor |
| Acts on | A reversible, competitive inhibitor of the aromatase enzyme, reducing conversion of androgens to oestrogens. | 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 50 hours. | Approximately 2 days. |
| Storage | Cool, dry, dark. | Cool, dry, dark. |
| Listings | 1 | 1 |
| Price from | £25 | £25 |
What actually differs
Half-life differs as well: Approximately 50 hours for Arimidex against Approximately 2 days for Letrozole.
Stocked at The PED Shop
Arimidex - Pharmain stock£25
Letrozole - Pharmaout of stock£25
Availability checked 2026-09-09. The product page carries live stock.