DXM dosage delay???????? Easy 10 pts?

SWIM is taking DXM and is wondering if he should break up his dose. Like take 1/3 and then another 1/3 half hour later then the rest half hour after that. I think this will help with nausea because he's not putting all of it in there at once. Also he is using gel caps and this will keep them from sticking together in the stomach and digesting slower?? Does any of this have any merit or should he just take it all at once?