This is a site where people share their experiences
http://www.askapatient.com/viewratin...VIGIL&sort=age
There are no long term studies, so you'll be one of the lab rats. Some of those who've taken it longer term complain of side effects relating to the digestive system, ringing in the ears, and memory problems. Generally taking a drug like this will knock something else out, we do need sleep for a reason, so if we override sleep there will be consequences.