What's the difference between arimidex and femara (letrozole)?

Different companies. These drugs have different structures but act in the same way. Both are aromatase inhibitors. Arimidex (anastrozole) (generic name anastrazole) and Femara (generic name letrozole) may have different side effects in different women, as well as different costs. They can be used interchangeably.
Very little. Both of these drugs are aromatase inhibitors and are used to treat post-menopausal hormone-sensitive breast cancer patients. Their chemical structure is remarkably similar. No study has ever compared these two drugs "head-to-head", so it is hard to recommend one over the other. If one of my patient's side effects are so severe that they are contemplating stopping the med, i switch to another.
3 choices. There is a 3rd aromatase inhibitor (ai) on the market called aromasin (exemestane). The structure of this ai is slightly different and it binds irreversably to aromatase, however no clinical difference is evident with this ai in comparison to the others. Furthermore, all 3 are currently available as generics.

Related Questions

What is the difference between femara (letrozole) and arimidex?

Both AI. Femara (letrozole) is letrazole, an aromatase inhibitor that is slightly more potent than Arimidex though belong to the same class of drugs. Read more...
Both interfere with . Estrogen production and are used in treatment of breast cancer where the primary was er+. Side effects are similar, cost is much higher fro Letrozole (femara). It is newer. These are each used only in postmenopausal patients. Tamoxifen around for decades is used in premenopausal. Read more...

What are differences between femara (letrozole) and arimidex?

The names and doses. Femara (letrozole) and Arimidex are both aromatase inhibitors that are taken by mouth once a day. They work by prevenitg fat cells from making estrogen, which lowers total estrogen in your body. We use them identically in practice. Read more...

Cn femara (letrozole) taken instead of arimidex if arimidex not found?

As your Doctor. This question is best answered by the doctor who prescribed Arimidex (anastrozole). There are many different reasons to prescribe it. I wouldn't make this kind of substitution without an OK from your prescribing doctor. Best wishes! Read more...