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Methamphetamine use
Meth lecture
24
Medical
Graduate
09/11/2008

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Cards

Term
What is crystal Methamphetamine?
Definition
A chemical stimulant that is highly addictive and causes pts to become dangerous while under influence.
Term
What are the effects in time of Meth after taking?
Definition

oral: 20-30m

snort 3-5m

smoke: 7-10

skin bumps: 10-15

effects last.

Term
What is unique about the geographical spread of Meth use?
Definition
stared in west-midwest due to easier meth lab hiding.
Term
How is Meth metabolised?
Definition
by the CPT 2D6 isoform of the P450 enzyme system (just like Ecstasy).
Term
What is the primary neurotranmiter that Meth stimulates the release of?
Definition
Dopamine. meth stimulates 600x normal dopamine release.
Term
What are the acute physiological effects of taking Meth?
Definition
  • euphoria
  • paranoria
  • AGGRESSION
  • increased HR
  • INCREASED SEX DRIVE
  • decreased sleep & appetite
Term

True or False

Meth activates a reward pathway in the brain.

Definition
True
Term

True or False

Meth's neurotoxic effects are the most devastating & potentially permanent of its sequelae.

Definition

True.

Term
What is the plasma half-life of Meth?
Definition
12h
Term

True or False

Meth leads to a decrease in dopamine transporter levels.

Definition
True.
Term
What are some expected medical complications related to Meth use?
Definition
  1. MI & stroke (with long term use)
  2. Smoking meth R/T pulmonary HTN & dialated CM.
  3. immunomodulatory activity
  4. bruxisam and lovely preiodontal disease.
Term
What physical effects does Meth cause?
Definition
  1. dramatic wt loss
  2. facial disfigurement
  3. social dysfunction
  4. jumpy eyes
  5. rapid eye movements
  6. PUPILS MAY BE DIALATED OR CONSTRICTED.
  7. dkin bumps
Term
What are some detremental S/E of taking Meth?
Definition
  • Rhabdo
  • "tweaking"-doing same thing for hrs.
  • severe HTN: can be 300/200
  • tachy,tachpnea, HYPERTHERMIA (like coke)
Term
What are skin bumps?
Definition

Nodules, formed of toxins,  that develop under the skin after using Meth.

Addicts suck out the fluid & eat residue.

 

Term
What are some psychiatric effects of taking Meth?
Definition
  1. 10% of Meth users have FRANK PSYCHOSIS
  2. Hypomania
  3. VIOLENT PHYSICAL & SEXUAL BEHAVIORS.
  4. Appetite suppression
Term
What is "Terrible Tuesday" withdrawl?
Definition
  • Carbohydrate craving.
  • depression w/ suicidal ideation
  • long term Meth use only 1-2y
Term
What is significant about the course of chronic depression after abstinence from Meth?
Definition
62% of former users remain depressed 2-5y after stopping Meth use.
Term

True or False

Craving for Meth can last up to 1y after stopping use.

Definition
True
Term
What are some long term cognitive effects of Meth use?
Definition
  • divided attention
  • set shifting
  • concentration
  • learning & memory problems
  • Many Meth users had ADD as a kid.
Term
What s/s can be expected in Meth withdrawl?
Definition
  • severe physical exhaustion
  • intense hunger
  • palpitations
  • depression
  • may last several weeks.
Term
Why is Wellbutrin not a good choice for tx of Meth addiction?
Definition
Lowers seizure threshold.
Term
How do we tx Meth addiction?
Definition
  • Tx substance-induced psy disorders.
  • CELEXA 20mg PO QD
  • Ambien 10mg
  • Depakote for mood stabilization
  • Zyprexa, Risperdal for phychosis/anxiety.
Term
What diagnostics should be ordered for your pt on Meth?
Definition
  • CXR
  • EKG
  • Blood Cultures (if + order Echocardiogram)
  • HIV/STD/Hepatitis Screen.
Term
What teaching should take place for the pt with Meth addiction?
Definition
  • Motivational interviewing
  • harm reduction
  • Adherence strateies while using
  • Decrease STD transmission
  • Decrease HIV spread.
  • Gay/Lesbian centered tx avail.
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