the crash is very rough, save the ativan for that. this is a STRONG stimulant, don't think because it's otc that its weak, it's often thought of as stronger than adderall. also, don't eat the cotton, and you may want to start with half to see how it affects you(you don't wan't to go into cardiac arrest, as stated above it is strong at the PNS).
there's loads of threads on the subject, look there for any more info.
People are probably gonna shit on me for saying this but I completely enjoy the high from propylhexedrine (the first high you get off 250mg after you haven't used any in at least 2 weeks, with a 250mg booster dose ready for you to redose if the effects are not strong enough for you although 250mg seems to be enough to produce a substantial speed high with empathogenic qualities it is very pleasant I find. I 've used lots of stims so I can compare it to adderall, 4-FA, and ice. I prefer instant release adderall although I think I would prefer dexedrine more but I doubt will ever come across any unless I hopped onto darknet or I faked a case of adhd which I don't want to have to lie to get drugs, lol 8).
Adderall being my stimulant of choice for several reasons, however propylhexedrine is tied in 2nd place for being my next favorite stim alongside 4-FA. You see I find the effects of 4-FA similar to propylhexedrine, even more similar to propyl than to methamphethamine, which is just not a smart drug to experiement with, the addiction potential is horrifying, but hey if IV'ing drugs like crank or heroin or crack sounds like a good idea to you, well now you've been warned of the addictive risk, if you weren't aware anyways I'm getting way off point. In fact I can't remember what was I going say hahah the ambien must be effecting memory, and perhaps the lines of cocaine I am in the process of snorting.
4-FA is also definitely mdma-esque is some of its' effects. But our waterboy for the local alligator wrestling association said that he much prefers pure molly shards, most beautiful mdma glasslike crystal shards, and 4-FA pails in comparison to a full on ecstasy roll. How much more so with some brown sugar mda sassafrass, also way above 4-FA if you're trying to enjoy an empathogenic amphetamine.
I'm done rambling coke is making me ramble ramble ramble HAHAH...
Edit: As for the lavender oil and menthol, it is completely safe to consume in the small quantities found in a single cotton rod, and will pose no feelings of 'garbage high' physically to speak of, it's all in the head of the user. Personally I view people who use otc DXM without performing a full fledged extraction of the cough medicine to be 'garbage users'. Yes it's biased and judgemental, but I do indeed view otc dxm as a classical garbage high right alongside huffing gasoline or paint stripper. Perhaps it's because I am hesitant to use dissociatives in the first place, and will only partake of something 'holey' pure like the divine molecule that is mxe.
Ideally one would get the most out of benzedrex inhalers if they full on extracted propyl from the cotton. But again who wants to go through this trouble when you could be shake and baking meth for the same amount of legwork?
So don't let the foul taste of lavender and menthol scare you or make you feel dirty, there are no adverse effects from the amounts in a cotton or two when ingested infrequently. If one were to use this multiple times a week or god forbid daily, one should be worried about the effects that propylhexedrine will take on one's heart and CNS health, lavender and menthol would be the least of your worries.
Only a fool would eat a cotton rod, or perhaps a young juvenile high schooler who subconsciously knows their body is resilient and can handle gelcapping a cotton without any adverse effects. But still, it's not advised. You can still get tweaked off the much kinder 'soak & squeeze' extraction.