Propylhexedrine

[GarryDrold]

An over the counter stimulant drug found in [Benzedrex] (as a racemic freebase oil along with lavender oil and menthol, absolutely nasty) inhalers to be used as a nasal decongestant. In the body it acts centrally and peripherally by increasing levels of dopamine, norepinephrine, and (possibly considering structural similarity to methamphetamine) serotonin making it a monoamine releasing agent and monoamine reuptake inhibitor.
[Propylhexedrine] can be ingested by cracking open the Benzedrex inhaler, obtaining the cotton inside, and:

Simply ripping the cotton up and swallowing it (be ready to gag)
Ripping the cotton and stuffing it into adequate sized capsules and then swallowing the capsules (pretty easy)

The effects of [propylhexedrine] tend to include (but not limited to) euphoria, anxiety, pleasant tingling sensations, [tachycardia] (fast heart rate), dilated pupils, increased libido, erectile dysfunction (hard to get hard ;D), tics, insomnia, increased alertness, excessive sweating, rapid thought processes, increased motivation, moderate hypertension (blood pressure increase), etc.
Some people experience severe side effects due to propylhexedrine being a vasoconstricting (constricts blood vessels) including severe hypertension, severe tachycardia, faintness, dizziness, [syncope] (fainting), sudden headache, dysphoria, etc.
See the Erowid and Wikipedia page for propylhexedrine, [Google is your friend].