What happens when you snort Sudafed PE?
Sudafed PE contains phenylephrine as the active ingredient. This is the same ingredient as most nose sprays. Most likely you will experience congestion relief, and maybe an increase in blood pressure.
Snorting it will probably work better than swallowing it for its intended purpose, but you can just get nasal spray.
The difference between Sudafed and Sudafed PE is that Sudafed contains pseudoephedrine and Sudafed PE contains phenylephrine. While phenylephrine doesn't work quite as well as a decongestant, it is the most common decongestant ingredient in cold and sinus formulations, due to the fact that people were using pseudoephedrine to make the illegal drug methamphetamine.
No. Sudafed PE is Phenylephrine. This medication is a vasoconstrictor (it raises blood pressure -- mostly when administered IV -- PO admin doesn't show much change), an eye dilator, and -- maybe -- a decongestant (although recent studies indicate it doesn't outperform the placebo). There's nothing psychoactive there.
Sudafed is a brand name, so it's hard to say, since there are different formulations. The active ingredient in plain old original Sudafed was pseudoephedrine hydrochloride, while the "active" ingredient in the new Sudafed PE is phenylephrine hydrochloride. (Note: in some locations the new stuff is marketed as simply Sudafed, so if you're looking for a decongestant that actually decongests better than a placebo does, check the ingredients list).
Sudafed PE is phenylephrine, a very old, very safe decongestant. Advil PM is ibuprofen and dyphenhydramine (Benadryl). They are safe to take together. Advil is a pain reliever and fever reducer, of course, and the dyphenhydramine is actually an antihistamine, which tends to make you very sleepy, too (hence the "PM" - "nighttime" label).