1300-1400 in delsym form? was it the small bottles? cause two big ones is 1776mgs. i like the polistirex cause every part lasts longer with it, but of course not as intense as 1776 mgs of hydrobromide would be. a steady, solid, continuous 900 mgs is what it would most feel like. or like you took 400mgs, then another 400mgs as that one was peaking, then another and so on. its hard to describe, but the time release mechanism of the polistirex gives it a different signature feeling, you know what i mean? i think the polistirex gives it some more plateaus inbetween the regular ones, or lets you feel them more. its fun to mix polistirex with hydrobromide.