Iressa Side Effects Warning

Has anyone else experienced mental "fog" & extreme fatigue while taking Iressa? My mother was moved up to a double dose & shortly after starting that became incoherent, unsteady on her feet & slept all the time. She had no visible side effects when she was on the regular dose but they moved her up to a double dose to try to shrink the tumors (reg. dose had stopped their growth). The case manager, after hearing of the extreme change, told her to stop taking the meds & get to the doctor or hospital for an eval. They (the ER-she was taken there by the squad after a fall in the shower) couldn't find any cause other than the Iressa. This doesn't seem to be a "known" effect. Now it is.

I got very tired when taking Iressa, so I started taking naps everyday. I only took the regular dose. Have not heard of doubling dosage. I can imagine that it might cause the effect you mention.

Thanks for your thoughts, it looks like Iressa isn't the cause of my mom's symptoms. They think the cancer has metastasized to her brain.