Well delsym is the magic moose so it should last about twice as long, but come on slower. depending on how frequently you moose and how high the dose is, effects can very. if you don't moose often then you should be pretty high for at least 8 hours before it starts to wear off. you definitely won't have your face back in time for school, but it should be worn off enough that your motor coordination and speech should be passably normal. personally, i used to moose in huge doses for weeks on end, and nobody ever had a fucking clue aside from when i'd sweat hella bad or sort of stumbled over words/talked funny. most of the side effects that let people know you're high are really mind over matter. you can even keep from robo walking by finding a way to relax your muscles, you just gotta find what works for you. same for trying to pee.