m2 Flashcards
Amphetamine was derived from
Ephedra sinica
Traditional Chinese medicine herb Ma _
has been used therapeutically for _ years
huang
5000
_ _ synthesized alphamethylphenethylamine (amphetamine; AMPH) in 1887 to treat _
Lazăr Edeleanu
asthma
L-amphetamine (3)
Raises BP, opens nasal passages, causes headache
Raises BP, opens nasal passages, causes headache
L-amphetamine (3)*
D-amphetamine (3)
*
Same effects as L-form, * Also elevates mood, enhances energy*
Same effects as L-form, * Also elevates mood, enhances energy*
D-amphetamine (3)
meth has Increased _ solubility → increased _ and _ effects
lipid
potency, brain
types of Potency for amph (least to most):
L-amphetamine < D-amphetamine < methamphetamin
making meth: Pseudoephedrine or ephedrine from over-the-counter decongestants
- _ synthesis
- what’s the process of making meth?
Nagai
OTC -> hydrolic acid, red phosphorous -> meth + contaminants
making meth: Commercial phenylacetone
commercial phenylacetone ->
commercial phenylacetone -> Reductive amination or Leuckart synthesis -> meth
Chemical similarity to catecholamines allows
amphetamines to bind neurotransmitter _.
what are the catecholamines that are similar in shape?
transporters
meth, da, amph, ne
Amphetamines are recreational _
stimulants
METH becomes the drug of choice → extra _ group
* Slower _
*_ -intensive effects, euphoria/disphoria
* _ form, cheap/expensive
methyl
metabolism
CNS, euphoria
Smokeable, cheap
Ice is _ salt, smokeable meth → half life ~ _hours
* Ice is to METH what _ is to cocaine
(in)/Effectively absorbed from the GI tract, _ bioavailable
HCl, 12
crack
effectively, 70-100%
4 ways to consume amphs:
fastest - slowest onset
Ingested, injected, snorted or smoked
smoking < injection < snorting < ingesting
t/f: METH high lasts much longer than cocaine
t
Liver _ metabolizes METH and AMPH
CYP2D6
4-HA and norephedrine are _:
stimulants
TAAR
trace amino associated receptor
- 4-HA activates _ , stimulates _ release and inhibits _
- TAAR is an intracellular _
- Monoamine oxidase (MAO) degrades monoamine NTs like _, , _
* reduces rate (in _% of Caucasians, _% of East and SE Asians)
trace amino associated receptor (TAAR), NE, MAO
GPCR
DA, NE, 5HT
CYP2D6*10
10, 75
Summary of AMPH/METH pharmacokinetics:
distribution (5 organs, length of onset)
absorption (4ways, bioavailability)
metabolism (enzyme, half life for meth and amph)
excretion (3 ways)
brain, kidney, liver, spleen, lungs, 30-120 mni
inhalation (~70%), injection, insufflation (80), ingestion (70-99)
liver CYP2D6, meth: (12+ 1/2), 10-20h duration, amph (11h 1/2), 3-12h duration
kidney, sweat, saliva
Acute effects of AMPHs
Euphoria, energy, aggression, grandiosity, decreased appetite
* Sympathomimetic → increased _ release
* Delusional _ (i.e. bugs under skin) and perceptual _ → increased/decreased _ release
* Locomotor activity → increased _
* _ – at high doses, repetitive meaningless behaviours; also common in _ patients
* Basal ganglia controls selection of action, too
much DA leads to more/less selectivity
NE
parasitosis, disturbances, increased 5HT
DA
punding, Parkinson’s
less
AMPHs, mechanisms of action
Elevates _, _, _, availability
* Does/Does not require DA-ergic neuron firing, unlike cocaine
* _ _ brings meth into nerve terminals
* Also enters by _
* _ pumps meth into storage vesicles
DA, NE, 5HT
does not
DAT transporter
diffusion
Vesicular monoamine transporter (VMAT)