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Drug Abuse and Dependence
N/A
33
Pharmacology
Undergraduate 2
02/19/2011

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Term
self-administration
Definition
the end result of drug seeking behavior; animal models; drugs of abuse are reinforcing
Term
Drug Dependence
Definition
the non-medical use of a substance for any of the followig reasons - psyhic effect, dependence, or sucicide attempt/gesture
Term
Tolerance
Definition
the effect of a specific dosage with repeated administration, or a higher dosage is needed to produce the same effect with repeated administration.
Term
Dispositional tolerance
Definition
due to changes in the pharmokineticproperties of the drug (absorption, distribution, metabolism, and/or elimination)
Term
pharmacodynamic tolerance
Definition
due to adaptive changes in the affected systems (e.g. down-regulation of receptors
Term
behavioral tolerance
Definition
an individual alters their behavior in order to adapt or compensate for a drug (ex. Alcoholic widens gate)
Term
physical tolerance
Definition
is the presence of a "withdrawl" or abstinece syndrome, which is charaterized by signs and symptoms usually opposite to those produced by the acute administration of the drug.
Term
behavioral/psychological dependence
Definition
enduring problem with drug abuse and can occur independently of physical dependence.
Term
cross dependence
Definition
this phenomenon arises in some drug categories, such as the opiates (heroin, morphine etc) and tryptamines (LSD, mescaline and psilocybin) when the prolonged use of one drug in the group results in the development of tolerance to the others opioids.
Term
polydrug use
Definition
when drug abusers abuse multiple drugs; very few abuse only a single drug
Term
Cannaibinoids (THC)
MOA
Definition
CB1 receptor: central(brain psychoactive effects)responsible for behavioral dependence.CB2 receptor: peripheral(tonsils, testes, etc.)
Term
Cannaibinoids (THC) Dependence and OD
Definition
Creates no physical dependence, creates behavioral dependence and tolerance. OD:rare but treated with Rimonabant
Term
CNS Stimulants(Cocaine, Amphetamine, Methamphetamine)MOA
Definition
Indirect-acting sympathomimetics that increase dopamine and norepinephrine
Differential tolerance to some effects not all
Term
CNS Stimulants(Cocaine, Amphetamine, Methamphetamine) Dependence & OD
Definition
OD: anti-psychotics or CV drugs HR high use cardiovascular drug Beta blocker; propranolol.
Dep: anti- depressants
Treat psychotic symptoms with chlorprozine, and halopradol
Causes behavior/physical(depression like symptoms)and tolerance: anorectic, tolerant to some effects and not all tolerate to all euphorogenic effects etc.
Term
Dissociative Anesthetics
(PCP, Ketamine) MOA
Definition
Glutamate receptor antagonists
Term
Dissociative Anesthetics
(PCP, Ketamine) Dependence
Definition
Physical dependence is life threatening withdrawl that suppresses neuronal firing. Produces behavioral dependence and tolerance.
Term
Dissociative Anesthetics
PCP, Ketamine) OD
Definition
OD: life support
Dep: no real treatment deal with symptoms
Term
CNS Stimulants(Cocaine, Amphetamine, Methamphetamine) OD
Definition
OD: anti-psychotics or CV drugs HR high use cardiovascular drug Beta blocker; propranolol.
Dep: anti- depressants
Treat psychotic symptoms with chlorprozine, and halopradol
Causes behavior/physical(depression like symptoms)and tolerance: anorectic, tolerant to some effects and not all tolerate to all euphorogenic effects etc.
Term
Hallucinogens MOA
Definition
2 MOA:
1.)5-HT2A agonists (LSD, Peyote, mushrooms)
2.)anti-muscarinics (atropine, scopolamine) Cross tolerance: no cross tolerance with 1 and 2 because have different mechanisms.
Term
Hallucinogens dependence
Definition
No physical tolerance (mice wont admit THC or Hallucigens); Behavioral dependence:Yes; Creates tolerance but no cross tolerance
Term
Hallucinogens OD
Definition
OD: 1.)5-HT2A agonists: block atypical anti-psychotics(risperidone, ziprasidone)
2.)Anti-muscarinic: cholinesterase inhibitor (physostigmine)
Term
Opioids(Morphine, Codeine, Heroin) MOA
Definition
MOA: Mu Opioid receptor agonist
Term
Opioids(Morphine, Codeine, Heroin)Dependence
Definition
Physical dependence is not life threatening (but may feel that way), Behavioral Dependence occurs and tolerance occurs with differential tolerance, pain effects except constipation and pupil dilation
Term
Opioids(Morphine, Codeine, Heroin) OD
Definition
OD: Naloxone people who aren’t dependent on them.Dep:1.)Substitution-
Methadone, Buprenorphine Drug diversion – adminstered a drug in way not prescribed (e.g. snorting it)
2.)Antagonist- Naltrexone only for someone who wants to quit.
Term
Sedative hypnotics(benzodiazepines, barbiturate, ethanol) MOA
Definition
Positive allosteric modulators of GABAA receptors.
Term
Sedative hypnotics(benzodiazepines, barbiturate, ethanol)dependence
Definition
Physical dependence is life threatening; withdrawl is extremely dangerous. Excitation with withdrawls causes convulsions. Both behavioral dependence and tolerance are created.
Term
Sedative hypnotics(benzodiazepines, barbiturate, ethanol) OD
Definition
OD: 1)Barbiturates & Alcohol– life support 2)benzodiazepines– Flumazenil
Withdrawal: 1.)Alcohol – benzodiazepines
Dependence: 1.)Alcohol – naltrexone works on opiate receptor adverse therapy. Acomprosate, disulfaram makes you sick when you drink normally you have alcohol broken down to Acetyl Aldehyde and then broken down to acetate, and water. With drug alcohol is not metabolized properly and you have a build up of acetyl.
Term
Volatile intoxicants(paints, glue, gasoline) MOA
Definition
Unknown; appears to involve GABA because of cross tolerance with sedative hypnotics
Term
Volatile intoxicants(paints, glue, gasoline)dependence
Definition
Does not create physical dependence because drug is short acting. Drug creates both behavioral dependence and tolerance.
Term
Volatile intoxicants(paints, glue, gasoline) OD
Definition
OD: life support and benzos for seizures
Term
Nicotine MOA
Definition
nACHR - Nicotinic receptors
Term
Nicotine Dependence
Definition
Very mild physical dependence but drug creates behavioral dependence and tolerance.
Term
Nicotine treatment
Definition
Substitution therapy
- bupropion block nicotinic receptors Varenicline (Chantix)
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