I got a call from the RE's office. The pituitary gland tumor has shrunk since the last MRI, which was about 4 months ago.
The last results showed that the tumor was 7 by 7. These results are now showing 3.8 by 6! So, it's shrinking.. Let's hope that it continues to shrink.. It sucks taking the medication because it makes me feel sick, but as long as it's working, I'll continue popping the pills! :)