well....no.

A=acetaminophen---not good for your liver in high doses
P=Psuedo-ephedrine--I know it's not good in high doses either,not sure if you can OD or not,but i know it sure would wreck a trip
G=guaniffsean-induces vomiting-which would ruin a trip

so only do syrup with just dex....read up on dicks sticky at the top of this page