What is Anastrozole?

The short answer

In the US, you need a prescription to get Anastrozole.

3 sources
Status as of October 4, 2026
How we source
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By Ellum EditorialUpdated October 4, 2026AI use

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Peptides: Anastrozole (1 selected) · edit

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What it is

Type: Aromatase inhibitor (not a peptide)
Also known as: arimidex, adex, anastrazole

Regulatory status

FDA-approved (Rx) How we label status

As of October 4, 2026, Anastrozole is an FDA-approved prescription drug for breast cancer in postmenopausal women.

See Anastrozole in the Index →

Federal (FDA): Approved Rx (Arimidex NDA020541 1995; generics); label: breast cancer in postmenopausal women. Use in men is off-label
503A compounding: Approved-drug component (not in any 503A category) (as of May 14, 2026)
WADA 2026: S4.1 (named Anastrozole)

References

Sources as of October 4, 2026