http://www.totse.com/en/drugs/otc/dx...rex173605.html

Basically says polistirex is not weaker at all... it just makes it longer to kick in and if you do it for a long period of time it can build up and have a bad outcome. But delsym is some strong shit, i took 400 mgs and i got trashed one time... im bout to go take 600mg tonight