Vertigo occurs when there is conflict between the signals sent to the brain by various balance- and position-sensing systems of the body. Your brain uses input from four sensory systems to maintain your sense of balance and orientation to your surroundings.
SIDE EFFECTS. Serious adverse reactions with ARIMIDEX occurring in less than 1 in 10,000 patients, are: 1) skin reactions such as lesions, ulcers, or blisters; 2) allergic reactions with swelling of the face, lips, tongue, and/or throat.
The pain that you mention occurs frequently with arimidex. However, the itching that you describe with femara is not a common side effect. Both femara and aromasin can, uncommonly cause shortness of breath. You might discuss these drugs with an oncologist who has an interest in breast cancer to see what options would be best in light of your experience with these medications.