6/17- Substance-Related and Addictive Disorders II Flashcards
Sedatives, hypnotics, and anxiolytics include what?
- Barbiturates
- Benzodiazepines
- Prescription sleep meds
How is intoxication with sedative, hypnotic, or anxiolytic defined?
- Recent use of sedative, hypnotic, or anxiolytic
- Maladaptive behavioral or pscyhological changes 1 or more:
- slurred speech
- incoordination
- unsteady gait
- nystagmus
- impaired attn/memory
- stupor/coma
How is withrdrawal from sedative, hypnotic, or anxiolytic defined?
- Cessation (or reduction in) prolonged use of a sedative, hypnotic, or anxiolytic 2 or more (developing in hours-few days):
- autonomic hyperactivity (diaphoresis, HR > 100)
- hand tremor
- nausea/vomiting
- anxiety
- insomnia
- hallucinations (A/V, tactile)
- pscyhomotor agitation
- grand mal seizures
List of some Barbiturates?
- Phenobarbital (Luminal)
- Butalbital (Fiorinal)
- Secobarbital (Seconal)
- Amobarbital (Amytal)
- Phentobarbital (Nembutal)
Characteristics of Barbiturates?
- Uses
- Result from long-term use
Uses:
- Sedatives/anxiolytics
- Anticonvulsants
May have:
- Tolerance
- Dependence/withdrawal
- Lethal in overdose
What has largely replaced the use of barbiturates?
Benzodiazepines (think: similar to transition of TCA -> SSRIs)
List of Benzodiazepines
- Alprazolam (Xanax)
- Lorazepam (Ativan)
- Oxazepam (Serax)
- Chlordiazepoxide (Librium)
- Clonazepam (Klonopin)
- Diazepam (Valium)
- Temazepam
- Triazolam
Indications for Benzodiazepines?
- Highly effective anxiolytics and sedatives
- Muscle relaxants, anticonvulsants, amnestics
- GAD, Panic Disorder
- Insomnia
- Increase affinity of GABAA receptor for endogenous GABA, bind to BZD binding site
May see,cross-tolerance with alcohol and barbiturates (alcohol-like effects; treat withdrawal symptoms)
Risks of Benzodiazepines?
- Tolerance -> dose escalation
- Abrupt discontinuation -> withdrawal
- Requires gradual tapering of dose
- Abuse potential
- Low lethality in overdose, unless combined with other sedatives, then lethal !!!
- Intoxication, confusion, falls: esp. in elderly
- Paradoxical agitation - Disinhibition
What are some hypnotics? Used for?
Prescription sleeping medications
- Zolpidem (Ambien)
- Zaleplon (Sonata)
- Eszopiclone (Lunesta)
- Remelteon (Rozerem)
- Chloral hydrate (Noctec)
- Meprobamate (Miltown
What are opiates? What are opioids?
Opiates- opium and naturally-occurring derived drugs (morphine and codeine)
Opioid- class of substances that acts on opioid receptors, includes synthetic drugs that bear little resemblance to opium
What are some natural opiates?
- Opium
- Morphine
- Codeine
What are some semi-synthetic derivatives of opioids?
- Heroin
- Hydrocodone
- Hydromorphone
- Meperidine - Oxycodone
What are some synthetic opioids?
- Fentanyl
- Meperidine
- Methadone
- Propoxyphene
3 phenomena seen in the neurobiology of opiods?
- Euphorigenicity of the drugs
- Capacity to positively reinforce drug seeking
- Avoidance of aversive feelings (including withrawal)
What are the different opioid receptors?
Responsible for?
Mu
- Opioid drugs (morphine is prototypic agonist)
- Analgesia, respiratory depression, mood elevation, constipation, immuno-suppression, physical dependence
Delta
- similar to mu
Kappa
- Dysphoria (endogenous dynorphins)
OFQ/N
- Analgesic or pro-nociceptive ffects
Which receptor do opioid drugs bind?
Mu opioid R
What is opioid intoxication?
Recent use of an opioid
Problematic behavior or psychological changes:
- Initial euphoria followed by apathy, dysphoria
- Psychomotor agitation or retardation
- Impaired judgment & social/occupational fxn
Pupillary constriction and 1 or more:
- Drowsiness/coma
- Slurred speech
- Impaired attention/meory
What is opioid withdrawal?
- Cessation of or reduction in prolonged opioid use (or administration of an antagonist)
3 or more:
- Dysphoric mood
- Nausea/vomiting
- Muscle aches
- Lacrimation/rhinorrhea
- Diarrhea
- Pupillary dilation/piloerection/diaphoresis
- Yawning
- Fever
- Insomnia (everything runs)
Opioid Intoxication vs. Withdrawal?
Treatment of opioid intoxication?
Naloxone (Narcan): IV, IM, SC, ET
- Treatment of acute opioid overdose (0.4-2.0 mg Q 2-3 min prn)
- Diagnosis of physical dependence via relief upon reception
- Poor PO absorption (wouldn’t be able to take it by mouth at this point anyway)
- Rapid parenteral metabolism
Treatment of opioid withdrawal: detoxification?
Often done inpatient b/c so distressing
- Clonidine (Catapres)
- Methadone
Characteristics of opioid withdrawal treatment with Clonidine
Clonidine (Catapres)
- Alpha 2 adrenergic agonist and anti-HTN
- Suppresses autonomic Sx of opiate wd
- Allows for more rapid etox
- Monitor for hypotension
- SE: hypotension, sedation, limits outpt use
- Lethargy, restlessness, anxiety, insomnia, cravings, not well relieved
Benzodiazepines for anxiety
Low-dose propranolol for restlessness