Gatorade and "bowel troubles"?

I'll leave it to your imagination what "bowel troubles" means, but basically I was doing my long distance run for the week (goal 11 miles). In the past when I run I have drank no water or gatorade during my runs. This was the first time I was incorporating liquid DURING a run. Everything was going fine until about 35 minutes in I start to feel a little nauseous? I don't know the word, but it is the feeling you get when you really have to go. I chugged on for another 3 minutes before hopping off the treadmill and running to the bathroom. Needless to say, I was unable to complete my run. So, does anyone know how I can incorporate gatorade into my run safely?