Exemestane

Why this is used

Exemestane is used to treat early breast cancer in women who have experienced menopause ('change of life'; end of monthly menstrual periods) and who have already been treated with a medication called tamoxifen (Nolvadex) for 2 to 3 years. This medication is also used to treat breast cancer in women whose breast cancer has worsened while they were taking tamoxifen. Exemestane is in a class of medications called aromatase inhibitors. It works by decreasing the amount of estrogen produced by the body. This can slow or stop the growth of some breast tumors that need estrogen to grow.

How to take it

Exemestane comes as a tablet to take by mouth. It is usually taken once a day after a meal. Take exemestane at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take exemestane exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. You may need to take exemestane for several years or longer. Continue to take exemestane even if you feel well. Do not stop taking exemestane without talking to your doctor.

Side effects

<p></p> <p></p> <p></p> <p>Exemestane may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

<ul>
<li>
hot flushes</li>
<li>
sweating</li>
<li>
muscle or joint pain</li>
<li>
tiredness</li>
<li>
headache</li>
<li>
dizziness</li>
<li>
nervousness</li>
<li>
depression</li>
<li>
difficulty falling asleep or staying asleep</li>
<li>
diarrhea</li>
<li>
hair loss</li>
<li>
red, itchy skin</li>
<li>
changes in vision</li></ul></p> <p></p> <p>Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:

<ul>
<li>
shortness of breath</li>
<li>
chest pain</li></ul>Your bone mineral density (BMD; a measure of the strength of the bones) may decrease while you are taking exemestane. This may increase the chance that you will develop osteoporosis (condition in which the bones are fragile and break easily). Talk to your doctor about the risks of taking exemestane.Exemestane may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.</p>

Precautions

Before taking exemestane, tell your doctor and pharmacist if you are allergic to exemestane or any other medications. tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: carbamazepine (Carbatrol, Epitol, Tegretol); medications that contain estrogen such as hormone replacement therapy and hormonal contraceptives (birth control pills, patches, rings, and injections); phenobarbital; phenytoin (Dilantin); and rifampin (Rifadin, in Rifater, in Rifamate). Your doctor may need to change the doses of your medications or monitor you carefully for side effects. tell your doctor what herbal products you are taking, especially St John's wort. tell your doctor if you have or have ever had liver or kidney disease.

Overdose

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
Educational reference only — talk to a pharmacist or prescriber about Exemestane.