Nuisance Nausea

cramping, diarrhea, etc also or just nausea?  have you tried different brands of electrolyte tab/gel?  I'm a big crusty/salty sweater too, just means you're pushing out a lot of electrolytes when you sweat. 

I was at 32oz per hour and was getting the same symptoms.  First, I increased my PB Perform drink ratio to a full scoop per 8oz (I was doing 2 scoops per 24oz of sports drink and taking in 8oz of water too), but still got the nausea.  Then, I thought it might be a salt issue because of my excessive sweating, so I bumped up my intake with Saltstick tabs, but still got the same symptoms.  So, I then decided to ratchet up my fluid intake to get closer to my sweat rate, but I'm still getting the same symptoms.

From what I've read, it seems to me that my calorie/carb/sodium/fluid numbers should be in a normal range (with sodium and fluids being towards the high side right now).  

My only thoughts are changing out either my sports drink or Gu.  Right now I have the Gu Jet Blackberry that caffeine, so that might be causing be troubles, but I didn't think one an hour would be too much.  I didn't want to go to something other than the PB Perform since it'll be on the course at the IM Kansas 70.3 that I'm scheduled for.  But, at this point, I'm willing to consider any option if it can help.  Any suggestions?

Update:  So, I've decided to back out and start all over.  I recently listened to a pod cast from Ben Greenfield with Dr. Stacey Sims and have made some changes.  Like was suggested, I've dialed back on my fluids to about 24oz/hr.  Also, I'm now diluting my PB perform by 1/3, so I'm at one scoop per 24oz.  I've also switched from gels to chomps. All of this has resulted in a decrease in calories and fluids, but the overall outcome seems to be positive.

The results are looking positive so far.  I've completed both a 2hr run and a 3 /12hr bike and I've felt great after both.  From what I can tell, I think I was just overtaxing my digestive system.  I've also been watching my sweat rates and was down about 2lbs for the run and actually up 1/2lb on the bike.  I'll need to keep a close eye as the temps increase, but I'm happy for right now. Hopefully, I'm on the right track for now.

I still need to work on my pre-workout meals.  The problem is that my schedule often forces me to start workout by 0500, which doesn't give much opportunity for a good meal beforehand.  Thanks for all the help!