Each week, we like to take a moment to boil down the biggest news from the most influential companies in the pharmaceuticals industry, and tell our viewers what that news means for you. We call that segment our Big Pharma Roundup.

In this week's installment, Motley Fool health care analyst Brenton Flynn talks about two drugs in the Alzheimer's disease space, one from Eli Lilly (LLY -2.63%) and one from Merck (MRK 0.44%), that are both progressing to further trials in a space notorious for failure. Will we see positive results from these drugs, or is their fate already sealed?