This is a trademark used for dextroamphetamine sulphate, commonly refered to as "dex." It commonly comes in small heart shaped orange tablets and (spansule-time release) orange and black capsules filled with small beads. This drug is commonly used by college students expecially during finals week, often resulting in post-finals sleep deprivation psychosis.

People often snort dexedrine. If you see someone with orange powder under their nose and they are spun it is likely dexedrine.

Tip: tablets are painless to snort, however, capsules contain sugar and are therefore painful to snort.