kiny, do you have any more specific info regarding the derivative drug and/or trials which caused deaths?
I was just trying to look into this since I'm not familiar. kiny, correct me if I'm wrong, but having poked around on the internet, I'm now inferring that you're meaning to say that Vedolizumab is a second generation version of Tysabri (Natalizumab) - is that your point? But when I try to research Tysabri, I don't see any mention of deaths from trials, but I see mention of 31 deaths due to progressive multifocal leukoencephalopathy (PML) after the drug was approved for use in USA and/or Europe (the specifics are not 100% clear to me from my read of Wikipedia). So is this what you're talking about or something else?
Also, from what I'm reading, Vedolizumab only targets the gut, rather than being more systemic like Tysabri, so perhaps it has a better safety profile. Or maybe that's a myth (I note the comments on this site regarding nightmares, etc.
http://www.crohnsforum.com/showthread.php?t=16116)
I also read that Vedolizumab is showing positive results for UC, but not really for CD. I have no stance toward any of these drugs, I'm just trying to better understand and get some more clarity into this thread about the pros and concerns that have been touched upon here.
I'm not sure how much to fault the blogger for failing to raise concerns, as it seems like a pretty cursory report.
But I think this is great that kiny has raised some concerns. I would definitely think twice and dig deeper before trying this med. Any med that reports to mess with a person's mental faculties is something I would tend to avoid like the plague.