Do you have a tolerance? 1400mg of poly should have you going good for a while.. And yes, do not use coricidan. It's not good for you at all. Neither is DXM but that chlorpheniramine maleate is worse. I believe that had I only used DXM only products that I would have caused myself less damage.
It sounds like the person probably does, yes, have some sort of tolerance. I'm just speaking from experience when I say that 1400mg is ONLY for people with at least SOME tolerance. Half that would be a full on experience for someone with no tolerance though the polystirex form has a less intense peak and longer total duration of effects.
Yeah for sure, that would definitely be enough for a non-tolerant person to easily reach a high 2nd/low 3rd... Unless it's purely because of tolerance, I'm stumped on why 1400mg poly wouldn't work..