Anavex Life Sciences Corp (AVXL)

[Steady_T]

Of course those tests are necessary. Adding any indication to a drugs labeling requires a standard demonstration of efficacy.

Sleep is a complex phenomena. Data about REM sleep doesn't say anything about the other three stages of sleep. Disrupt any one of those and it is not a good thing.
At present there is some consideration that disrupted deep sleep contributes to AD and other CNS issues because it is deep sleep where the brain flushes out the metabolic wastes generated during the day. Incomplete flushing is thought to result in increased inflammation.