Drug of Abuse Flashcards
Opioids (name some)
Heroin Morphine Fentanyl Oxycodone Hydrocodone
Opioids (mechanism)
u-opioid agonists
Opioids (reinforcing effects)
euphoria
sedation
Opioids (acute toxicity symptoms and treatment)
RESPIRATORY DEPRESSION
Miosis
COMA
Death, arrhythmias, convulsions are possible
Treatment: Naloxone (IV/SC)
Opioids (tolerance)
Develops rapidly
Does NOT develop to constipation or miosis
Opioids (Dependence)
Develops rapidly (3-4 doses/day x 1-2 weeks)
Opioids (Withdrawl)
Rarely life-threatening
Irritability, insomnia, increased BP, increased HR, cramps, diarrhea,
Treatment: clonidine (decrease SNS signs), methadone
Relapse: buprenorphine +/- naloxone, naltrexone
Ethanol (Mechanism)
CNS depressant
Facilitate GABA function
Inhibit GLU-NMDA fxn
Ethanol (reinforcing effects)
Anxiolysis, sedation, loss of inhibition
Ethanol (acute toxicity symptoms and treatment)
RESPIRATORY depression
COMA
Death
Treatment: Supportive plus fluids, thiamine, electrolytes
Ethanol (tolerance)
Moderately rapid
Tolerance to sedation-intoxication, less to lethal dose
Ethanol (Dependence)
YES
Within weeks
Ethanol (Withdrawl- treatment and relapse treatment)
Significant risk of mortality due to seizures
Visual hallucination
Delirium tremens
Treatment: BDZ (flumazenil)
Relapse: acamprosate, naltrexone, disulfiram
Benzodiazepines (mechanism)
CNS depressant
Facilitate GABA fxn
Benzodiazepines (reinforcing effects)
anxiolysis
sedation
loss of inhibition
Benzodiazepines (acute toxicity symptoms and treatment)
Lethality rare, unless combined with other CNS depressants
Treatment: Flumazenil
Benzodiazepines (tolerance)
Less than with ethanol
Benzodiazepines (dependence)
Harder to become dependent than with ethanol but still possible
Benzodiazepines (Withdrawl- treatment and relapse treatment)
Yes, can have seizures
Dose taper may require months
Treatment:
Busiprone is used for anxiety
Carbamazepine, phenobarbital are used as anticonvulsants
Barbiturates (mechanism of action)
CNS Depressant
Facilitate GABA fxn
Inhibit GLU-AMPA fxn
Barbiturates (Reinforcing effects)
anxiolysis
Sedation
Loss of inhibition
Barbiturates (acute toxicity signs and treatment)
Respiratory depression
Coma
Death
Treatment: supportive
Barbiturates (tolerance)
Very rapid
Significant tolerance to sedation-intoxication but less to lethal dose
Barbiturates (dependence)
YES
within weeks
Barbiturates (withdrawl)
Risk of mortality due to seizures
Treatment:
Busiprone is used for anxiety
Carbamazepine, phenobarbital are used as anticonvulsants
Cocaine (machanism)
CNS stimulant
Inhibits monoamine reuptake transporters
Cocaine (reinforcing effects)
euphoria
Decreased fatigue
increased arousal and confidence
appetite suppression
Cocaine (acute toxicity- signs and treatment)
SNS overactivity Increased HR, BP, body temp Chest pain Arrhythmias MI Paranoid psychosis
Treatment:
CV support
Vaodilators for BP
BDZs for agitation/seizures