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Should you take Aromasin with food?

Medically reviewed by Carmen Pope, BPharm. Last updated on April 28, 2025.

Official Answer by Drugs.com

Aromasin (exemestane) is a medication that is used to treat breast cancer in postmenopausal women. It is often given to women whose cancer has progressed despite surgery, radiation, or other cancer treatments.

The usual dosage is one 25mg tablet once daily after a meal.

Aromasin may cause nausea or indigestion and taking it after food rather than on an empty stomach may help reduce the incidence of this.

One study did show that food in the stomach and the formulation of Aromasin affected its absorption; however, this did not translate into any significant differences in the effect of the drug in the body.

How does Aromasin work?

The growth of many cancers of the breast is stimulated or maintained by estrogens.

Aromasin works by irreversibly inactivating the enzyme aromatase and is structurally related to the naturally occurring androgen, androstenedione. It acts so much like androstenedione, that the enzyme binds to it, and is unable to bind to anything else. This causes inactivation of the enzyme, an effect known as “suicide inhibition”.

Aromasin significantly lowers circulating estrogen levels but has no effects on the formation of corticosteroids, aldosterone, or any other enzyme.

What are the side effects of Aromasin?

Common side effects of Aromasin are:

Other side effects that may occur in less than 5% of women include:

References
  • Aromasin (exemestane) Pharmacia and Upjohn Company LLC https://www.drugs.com/pro/aromasin.html
  • Valle M, Di Salle E, Jannuzzo MG, et al. A predictive model for exemestane pharmacokinetics/pharmacodynamics incorporating the effect of food and formulation. Br J Clin Pharmacol. 2005;59(3):355‐364. doi:10.1111/j.1365-2125.2005.02335.x

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