Key facts about Arimidex
What is Arimidex?
Arimidex is the brand name for anastrozole and is available as an oral tablet.
What dosages is Arimidex available in?
Arimidex is available as a 1 mg oral tablet.
What is Arimidex used for?
Arimidex is an aromatase inhibitor that is used to treat early stage HR+ breast cancer in postmenopausal women, advanced or metastatic HR+ breast cancer in postmenopausal women, and advanced breast cancer in postmenopausal women that’s getting worse after treatment with tamoxifen.
How does Arimidex work?
Arimidex is an aromatase inhibitor. Aromatase is a protein in your body that helps change other hormones into estrogen. By blocking aromatase, anastrozole (Arimidex) lowers the amount of estrogen in your body. This is helpful since estrogen can fuel the growth of certain types of breast cancer cells. Without estrogen, cancer cells won’t have the “fuel” they need to grow or spread.
How do I take Arimidex?
Arimidex is typically taken by mouth once daily.
Is it safe for me to take Arimidex?
Arimidex is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not take this medication if you are premenopausal or pregnant.
Arimidex Common Side Effects
Common side effects of Arimidex include:
- Hot flashes
- Muscle and joint problems
- Tiredness
- Changes in mood
- Nausea and vomiting
- Bone fractures
- Cataracts
- Vaginal bleeding
Arimidex Serious Side Effects
Serious side effects are rare with Arimidex. Contact your healthcare provider immediately if you experience any of the following.
- Heart disease: chest pain, shortness of breath, lightheadedness
Effects of other drugs, drug classes and over-the-counter products on Arimidex
The following medications may interact with Arimidex:
- Tamoxifen – Do not use in combination with Arimidex as no additional benefit seen when used together
- Estrogen-containing products – Combination use may diminish activity of Arimidex
Who makes Arimidex?
Ani Pharmaceuticals
Is Arimidex safe in pregnancy?
Arimidex may cause harm to your unborn baby and is contraindicated in women who are or may become pregnant.













