Guaifenesin is not ideal to be ingesting large quantities of, but I don't believe that it poses any direct serious health risks to the body. I believe that the only side effect you might have from high dose guaifenesin would be increased nausea. I have used Robo DM before, years ago, that had DXM and Guaif.guaifenesin is an expectorant. i promise that if you drink syrup containing it you will have nothing but an AWFUL time. like everyone else has said, find syrup that doesn't contain anything but dxm or do a simple extraction.
z bottle and see how you feel. the best way to get DXM is on the internet. were i get it its 1000grams for 100 bucks.