Because it is the most idiotic launch of a product in recent memory. I can see it now at Merck:
"What should we do that would be pretty awesome?"
"Maybe we should grind up some of the Zocor tablets we were going to grind up to put in Vytorin, but since no one uses Vytorin anymore, let's grind up some Januvia tablets...mix em' up and create a product that no one will need.."
"Jee whiz boss, that sounds great but there is a potential issue...that pesky dosage limitation that was added to the simvastatin label. Especially when you couple that with the fact that if a person has Type-2 diabetes they are immediately labeled as high to very-high risk. And since you need 80mg of simva to get most people to these goals...well that really won't fly."
"No, no, let's just launch it anyway. I don't give a crap about that kind of stuff!"
"Man boss you're swell, now I see how you got where you are in life!"
"Damn right I'm smart, if my successful launch of Dulera didn't prove it this certainly will!"
Need I go any further?