Only once, it was given to me, can't remember the dose.
Thanks for the link knockando
No problem, and I'll just say here that,
in my (usually plugged) experience: after an allergy test a dose as low as 30-35mg can provide a nice perky glow. As you move up to the 50-80mg mark then expect initial, gentle, productive stimulation for a few hours followed by gentle sedation. The stimulation is not edgy/wired/heart-racing like a stim, it's more eradication of tiredness, which is nice when you are ready for a nap after work but you know it fucks up your sleeping patterns (that's me).
Projectile vomit becomes more likely as you dose higher, but it's usually smooth, not unpleasant, and over fairly quickly. 100mg+ in one plugged dose will reliably make me puke, but 70mg does not. I haven't plugged much over 100mg, although I have snorted 200mg+ in one session, but I don't find the (IMHO reduced and delayed) high with snorting worth the sickly drip. Bombing is a good, effective alternative as long as your stomach is empty, 50mg is a nice oral dose, come-up is slower but gets you there very nicely.
As you get over 100mg, whether all-at-once or with redose, the sedation gets a bit heavier. I haven't really found anything dangerous in the sedation, but be careful with combinations, especially other sedatives.
Other effects are "pleasant" itching and cure-all stuff like mood-lift and alleviating headaches and general aches and pains... seemed to prove very useful after Tuesday's tooth extraction and filling! Eradicates restless leg syndrome for me, however higher doses can and will interfere with sleep, making you wake up through the night, but on the bright side it somehow doesn't leave you exhausted the next day.
I've tried to avoid w/ds by avoiding daily dosing, keeping regular doses down at around 35mg, and not redosing. I have occasionally noticed worsened/spreading restless legs and sniffling that I put down to mild w/ds. Because it can be a productive "cure-all" style drug, the temptation is great - best to be aware of this, as regular high doses are going to lead to dark places...