The <blockquote>Quote
<hr>a young girl who was extremely thin and had several nervous ticks.<hr></blockquote>
Typical signs of a meth-head. I see a few here everyday in San Francisco, at the edge of the Tenderloin district. I think the person you saw was probably smoking it, or shooting it, because I'm not sure that just swallowing the pills will do this to you.
The original name for the drug, back before the mid 90s, was Ya Ma - Horse Medicine - nothing to do with any Hindu god.
Ya means any medicine. Tiger Balm is a brand of Ya Mong. The "five pagodas" stuff is "Ya Hom". Injecting medicine [shooting up] is "cheet ya".
Anyone who's been in Thailand any length of time has seen the sign in front of the pharmacy with green letters that says KAYYA - "sell medicine - spelled as one word.
Kayya
In the mid to late 90s the government started a campaign that sought to eradicate Ya Ma, at which time they changed the name to Ya Ba -- crazy drug. It is two words, not "yabba" like the Flinstones.


I've seen people "speedboat" ya ba...some whole routine with folding the foil from a cigarette wrapper into a little boat shape, putting a crunched up pill in it, heating it up from underneath with a lighter, and then inhaling the smoke via a water pipe of sorts.
Not a pretty drug, I've seen too many people hit hard by it.

One man on ice cut off his balls. Do you really want to try a stupid drug that makes people crazy?
"It's got to be on par with sniffing glue if you ask me."
Except for the punishment if caught. Make no mistake, we are talking about a real drug here. Part of it´s success is that you can stay awake for a pretty long time.
I could never unddrstand why people take a Drug that keeps you awake for days, totaly beyond me, i mean if i cant swing back and forth in hamock with it whats the point...