My 81 year old husband has had lung cancer for twelve years. During his last CT scan, he noticed that the medication they give him internally felt different than it had in the past. Plus, they stopped the scan short of what it usually took. Since then, my husband has experienced memory problems. He's never had any memory problem before with any treatment even chemotherapy. He see's his doctor in a few weeks. Does anyone have any suggestions as to how this memory issue should be handled? Could it be the same thing as the "Brain Fog" that I've read about on here with cancer treatments? Your advice and prayers are greatly appreciated!