chasing the dragon

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A slang term originating in Cantonese for an array of methods of drug abuse, in particular, inhaling vaporised opium, heroin, morphine, crack cocaine, DMT, MDMA, and even marijuana, which is thought to carry an increased risk of progressive spongiform leukoencephalopathy
Management None
Prognosis 25% mortality
Less commonly, the term refers to female heroin addicts who prostitute themselves for the next fix

chasing the dragon

Dragon chasing Substance abuse Inhalation of heated heroin–or crack, associated with progressive spongiform leukoencephalopathy Clinical progressive bradykinesia, ataxia, slurred speech, abulia, decorticate posture, spasticity, quadriplegia, dysmetria, broad-based gait Imaging MRI—diffuse, symmetric area of white matter hyperintensity, most prominent in the cerebellum; posterior brain, splenium of the corpus callosum, and posterior limb of internal capsule Management None Prognosis 25% mortality. See Cocaine, Heroin.
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References in classic literature ?
"Cadmus," said a voice but whether it came from above or below him, or whether it spoke within his own breast, the young man could not tell--"Cadmus, pluck out the dragon's teeth, and plant them in the earth."
This was a strange thing to do; nor was it very easy, I should imagine, to dig out all those deep-rooted fangs from the dead dragon's jaws.
Every tooth of the dragon had produced one of these sons of deadly mischief.
Agravaine felt that the dragon might be counted upon to do that.
'Ah, yes, the dragon,' said Earl Dorm, 'I was forgetting the dragon.
When a fiery dragon is ravaging the countryside to such an extent that the S.O.S.
We hope to grow to be dragons some day, but just now we're only dragonettes."
"Young dragons, of course; but we are not allowed to call ourselves real dragons until we get our full growth," was the reply.
Dorothy thought, if it had taken them sixty-six years to grow to this size, that it would be fully a hundred years more before they could hope to call themselves dragons, and that seemed like a good while to wait to grow up.
"I thought Lydgate never went to the Green Dragon?"
Sir Launcelot will give battle to dragons, and will abide by them, and will assail them again, and yet again, and still again, until he do conquer and destroy them; and so likewise will Sir Pellinore and Sir Aglovale and Sir Carados, and mayhap others, but there be none else that will venture it, let the idle say what the idle will.
"It would like them much; but an ye wot how dragons are esteemed, ye would not hold them blam- able.