As with any medicine, side effects are possible with Arimidex (anastrozole); however, not everyone who takes the medication will experience side effects. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.

Some women who have had breast cancer that affected the lymph nodes may develop lymphedema. This is a swelling of the arm that is caused by an accumulation of lymphatic fluid. To avoid, or manage, lymphedema:

* Avoid using your affected arm to lift or carry shopping bags, large purses, or other heavy objects
* Wear gloves when gardening or washing dishes to guard against infection
* Avoid wearing anything tight on the affected arm, including clothing, watchbands, or bracelets
* Wear a compression sleeve to help pooling fluid drain
* Perform gentle exercises to maintain flexibility and range of motion
* Call your doctor if your arm or hand becomes red, warm, or swollen. You may have an infection that requires immediate treatment