Alcohol misuse Flashcards
What is the difference between intoxication, harmful alcohol use and alcohol dependency
Intoxication = dose-dependent, transient state following use
Harmful = pattern of use that is likely to cause physical or psychological damage, non-dependent and continues despite established harm (social, mental, etc.). evident over a period of at least 12 months if substance use is episodic or at least 1 month if use is continuous
Dependence = need to use a substance to feel or function normally after a period of regular use (≥3 of 6 features of dependency)
How are units of alcohol calculated
Units = % ABV (alcohol by volume) x Volume (Litres)
What is the UK maximum for alcohol consumption and what is the threshold for hazardous and harmful drinking
14 units a week
Hazardous = 15-35
Harmful = >35
Define binge drinking
> 8 units for men
6 units for women
What are the symptoms of low levels of alcohol intake
Relaxing lowers inhibitions, makes people feel sociable and cheerful
What are the symptoms of high levels of alcohol intake
Slurred speech
Poor coordination
Exaggerated emotions e.g. hilarity, tearfulness, misery, irritability
Disinhibition
Impulsivity
Poor judgement
Blackouts with amnesia for the drinking period
What are the symptoms of severe levels of alcohol intake (alcohol poisoning)
Vomiting
Ataxia
Respiratory depression
Confusion
Coma
Death
What is the 12 month and lifetime prevalence of alcohol use disorder
12 month: 1.3%
Lifetime: 5.4%
What are the features of dependence
A strong desire or sense of compulsion to use
Difficulty in controlling use.
A physiological withdrawal state when use has ceased or been reduced.
Evidence of tolerance.
Progressive neglect of alternative pleasures and interests.
Persistence with use despite clear evidence of overtly harmful consequences.
Define alcohol withdrawal
Withdrawal from alcohol in patients who are alcohol-dependent and have stopped or reduced their alcohol intake within hours or days of presentation
What is the pathophysiology of alcohol withdrawal
Chronic alcohol use results in up-regulation of post-synaptic NMDA receptors and down-regulation of post-synaptic GABA receptors. A sudden decrease in blood ethanol concentration results in an imbalance between stimulatory NMDA and inhibitory GABA systems in the CNS
Abrupt alcohol cessation leads to overactivation of the excitatory NMDA system relative to the GABA system
→ Overactivity of the sympathetic nervous system
What are the symptoms of withdrawal 6 hours post-drink
Anxiety/agitation
Palpitations
GI upset: nausea, pain
Sweating and tremor
Headache
Insomnia
What are the symptoms of withdrawal 12 hours post-drink
Hallucinations: visual/tactile (usually insects on the skin)
Restlessness
Normal mental status
What are the symptoms of withdrawal 36-46 hours post-drink
Confusion, agitation
Seizures: short, generalised, tonic-clonic
What are the symptoms of withdrawal 48-72 hours hours post-drink
Delirium tremens:
- Profound confusion/delirium
- Visual, auditory and tactile hallucinations, characteristically frightening
- Lilliputian hallucinations (seeing little people) are characteristic.
- Insects on the skin
- Tactile: itch, burn, insects crawling
- Pins and needles, burning and numbness
- Coarse tremor
- Fever, tachycardia