Sorry to hear about the sickness. I totally understand. Tell DH to hold on and don't go toward the light! lol. My dad is the same (bf isn't quite as bad). Dad will always tell me "if a woman was as sick as I am now, she'd be in the hospital". LMAO. This from the man who claimed to have been bitten by a snake when a bungie cord snapped back at him! Had to take him to the ER to convince him that he just had a speck of metal stuck in his hand!
Since you're doing a juice run, I assume you're pushing fluids at him, good for you. I would reccomend something that'll replace electrolytes as well as water, though, especially if he has any diarrhea or loose bowels. Pop and sugar-y juices will only irritate his stomach. Pedialyte is great because it's low in sugar and high in electrolytes he may be losing, but I'll assume he wouldn't drink that, so try gatorade or powerade. Limit sugar intake, especially processed sugars, and stick him on the BRAT diet....Bananas, Rice, Applesauce and Toast. None of that should upset his stomach, but it will give him some of the nutrients he's missing. Other than that, tylenol or advil (a little easier on the tummy) for fever and pain, roll the tv to him, or vice versa, and try to get him to sleep as much as he can. Pepto (vomitting, diarrhea, nausea) OR gravol (just nausea and dizzyness) OR imodium (diarrhea and gas pain) can settle his stomach if it's bothering. Good luck and here's hoping it passes quickly!