Psych pt ii Flashcards
(175 cards)
ICD 10 Dependence Syndrome
Past year, 3 or more of the following present:
Strong DESIRE or compulsion to take, difficulties CONTROLLING in onset, termination, or levels of use .
Physiological WITHRDRAWAL
Evidence of TOLERANCe
Progress NEGLECT of alternative pleasures or interests
Persisting with substance use despite clear evidence of overtly harmful consequences.
Dependence syndrome - bio aspect of biopsychosocial model
Bio - Strong familial aggregation, ie seen in alcohol abuse (3-5x more frequent in 1st family). Evidence that alcohol and drug dependence share a genetic liability with each other.
Genes which confer risk: Proteins inv in alcohol metabolism, proteins in neurotransmission, GABAa receptor. Cholinergic system, endogenous opioid system, endogenous cannabinoid system.
Cloninger’s Tridimensinoal Personality theory
Personality comprises three genetically independent dimensions, extended to alcoholism (Bio part of dependence syndrome)
There are two types
Type 1: Novelty Seeking (NS) Low, Harm avoidance (HA) High, Reward dependence (RD) High.
Type 2; NS high, HA low, RD low
Addictive drugs that block DA transporters ( to increase dopamine)
Cocaine, amphetamines - block DA transporters to increase levels of dopamine
Drugs that enhance DA release to exert increase of DA effect
Nicotine
Addictive drugs that increase DA by inhibiting GABAergic suppression of VTA
heroin, morphine
Drugs that lead to physiological dependence
Sedatives and opiates, and nicotine
Sedatives incl - alcohol, barbiturates, benzodiazepines, cannabinoids
Opiates - heroin, morphine, methadone.
hallucinogenic drugs
Incl ketamine, LSD, phencyclidine, psilocybin, solvents
Psychological/psychic dépendance
Stimulant drugs
Incl amphetamines, cocaine, ecstasy
- psychological/psychic dépendance - experience of impaired control over drug/substance use
Symptoms of alcohol withdrawal
Within 24 hours: tremor, hyperhydrosis, nausea/vomiting, insomnia
Post 24 hours: withdrawal seizures, ie generalised tonic-clonic
Post 48 hours to 72 hours: Delirium tremens, agitation, confusion, hallucinations, tachycardia, hypertension, hyperthermia
Neurotransmitter effects of alcohol withdrawal - noradrenaline DA and Glu
Alcohol decreases NE. Withdrawal effect is an increase in NE - hyperhydrosis, tachycardia, hypertension, tremor, nausea
Short term alcohol increase DA, but long term decreases. So withdrawal symptoms are an increase in DA - psychotic symptoms ie hallucinations
Alcohol decreases Glu. So withdrawal: have an increase, get epileptic seizures.
Symptoms of Opiate withdrawal
Severe flu-like syndrome
Rhinorrhoea, sneezing, abdominal cramping, leg cramping, piloerectino, nausea, vomiting, diarrhoea, dilated pupils.
NO hallucinations, seizures or altered mental status.
Treatment of alcohol withdrawal symptom of seizures
Diazepam - GABAa receptor modulator (promoting inhibitions, taking excess glutamate away)
Treatment of sympathetic side effects of alcohol withdrawal
Clonidine - partial alpha 2 agonist. Ie reuptake of norepinephrine, decreased effects
Treatment of psychotic symptom side effects of alcohol withdrawal
Haloperidol - high affinity D2 antagonist
‘Cold’ Detox - opiate withdrawal
Not life-threatening, provide symptomatic medication for nausea, diarrhoea, tachycardia./HTN
Symptômes peak at 2-3 days
Last no longer than 5-7 days, though hypersomnia can continue for weeks
‘Warm detox’ opiate withdrawal
Substitution of opiates with methadone
Réduction of methadone dose over ~ 3 weeks.
provide symptomatic meds for nausea, diarrhoea, tachycardia/HTN
Problem - long stay on closed ward, potential chance for relapse?
Etiology of drug use, 5 drug induced effects on brain function
- Stimulate reward circuitry. (Direct or indirect) - signal to repeat. Ie DA Mesolithic pathway - VTA to Nucleus accumbens.
- Reward path stimulation affects prefrontal cortex functioning, altering self-control.
- Can cause brain changes resulting in physical withdrawal symptoms. Discomfort drives relapse.
- Repeated use decrease availability of DA - prolonged anhedonia, triggers relapse (ie PROTRACTED ABSTINENCE SYNDROME)
- Drug use paired with environmental/internal cues - physiological changes trigger drug seeking. Ie conditioned stimuli.
Key assessment questions (alcohol screeing in primary care_
CAGE questions.- do you feel the need to CUT back, do you get ANNOYED with others for criticising your drinking, do you ever feel GUILTY about drinking, do you ever need an EYE opener (hare of the dog?) - Yes to >/2 highly suspicious of addiction.
FOY questions - has concern about your drinking been expressed by your family, others, or yourself? - yes to one highly suggestive of addiction.
Vaccination theory for drug addiction
Following vaccination, when substance used, antibodies bind to the drug, making it too large to enter the CNS. Thus, drug does not have reinforcing effects.
DSM 5 Substance Intoxication
Development of a reversible substance-specific syndrome due to recent ingestion of a drug. Syndrome due to drug effects on CNS and causes significant maladaptive behaviour or psychological changes
Alcohol Intoxication (DSM 5)
Significant Maladaptive psychological/behavioural change (ie impaired judgment PLUS >/1 of
- Slurred speech 2. Uncoordination 3. Unsteady gait 4. Nystagmus
- Impaired attention or memory 6. Stupor or coma
Substance intoxication varies within and between persons based on
Dose, chronicité of use, purity of drugs, polydrug use, tolerance, time since last use, environment drug consumed in, expectations of user
Substance withdrawal DSM 5
Substance specific syndrome following cessation of a substance after heavy/prolonged substance use
Syndrome causes significant distress or impairment of functioning