Drugs Flashcards

(55 cards)

1
Q

Define drug addiction

A

Chronic relapsing disorder
Characterised by compulsive drug seeking and use despite adverse consequences
Brain disorder - functional changes to brain circuits involved in reward, stress and self control
- can last a long time after person has stopped taking drugs

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2
Q

Define drug misuse

A

Taking a drug which harms or threatens to harm the physical or mental health or social well-being of an individual or other individuals or society of large or which is illegal

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3
Q

Misuse of drugs act

A

Provides legal framework for control of drugs according to potential for misuses
Classifies drugs and penalties based on harm/addictiveness

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4
Q

Drug classifications

A
Class A
- major opiates
- cocaine, crack
-LSD
- injected amphetamines
- magic mushrooms
- MDA
- Dealing -> up to life
- Possession -> up to 7 years
Class B
- cannabis
- oral amphetamines
- Ritalin
- pholcodine
- mephedrone
- synth cannabinoids
- Dealing -> up to 14 years
- Possession -> up to 5 years
Class C
- tranquilisers (benzodiazepines)
- some painkillers (buprenorphine, dextropropoxyphene)
- GHB
- ketamine
- Dealing up to 14 years
- Possession up to 2 years
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5
Q

Features of addictive process

A

An initial pleasurable effect

Rebound unpleasant effect on stopping

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6
Q

Drug dependence

A
Psychological dependence
Neuroadaptation
Tolerance
Physical dependence
Withdrawal syndromes
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7
Q

Drug related deaths in Scotland

A
Heroin commonest single drug
- poly use most common
Big rise in over 35 age group
Mostly white males from deprived areas
75% unemployed 
75% single
50% living alone
33% have children
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8
Q

Features of drug related deaths

A
75% occur at home
66% someone in vicinity
Ambulance attends in 80%
Resus attempted in 50%
Heroin in 59%
Methadone in 32%
Diazepam in 28%
Alcohol in 30%
Polydrug use is normal
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9
Q

Features of canabis

A

Active compound - tetrahydrocannabinol (THC)
Herbal cannabis comes from dried leaves, flowers
Cannabis resin (hash)
Cannabis oil - solvent extraction from resin
Smoked as joint or spliff, in pipe or bone, brewed as tea, eaten as cookies

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10
Q

Acute psychological effects of cannabis

A
Talkative, hilarity, well-being, confidence
Appreciation of sound and colour
Time slows
Nausea
Hunger
Poor concentration
Impaired driving
Anxiety, agitation, paranoia
Cannabis psychosis
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11
Q

Acute physical effects of cannabis

A
Dry mouth
Dilated pupils
Red eyes
Tachycardia
Hypertension
Postural hypotension
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12
Q

Chronic effects of cannabis

A
Psychosis - schizophrenia
Amotivational syndrome
Reduced sperm count in men
Reduced fertility in women
Bronchitis and emphysema
Query lung caner
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13
Q

Features of cannabis withdrawal

A
Irritability
Mood change
Restlessness
Loss of appetite
Weight loss
Insomnia
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14
Q

Acute effects of benzodiazepines

A
Relief of anxiety and relaxation
Impaired memory
Paradoxical aggression
Uncharacteristic criminal behaviour
Uncontrollable emotions
Effects potential by alcohol 
Hangover
Dizziness
Sedation
Incoordination
Sexual dysfucntion
Weight gain
Hypotension and coma with high dose
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15
Q

Chronic effects of benzodiazpeines

A

Chronic intoxication
Tolerance
Psychosocial and physical dependence

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16
Q

Benzodiazepine withdrawal

A
2-3 days on 
Anxiety, insomnia
Sweating and headache
Tremors
Nausea
Disordered perceptions
Hypersensitive to stimuli
Psychosis
Convulsions
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17
Q

Chronic adverse effects of amphetamines

A
Aggression, fatigue and insomnia
Anorexia, malnutrition and weight loss
Diarrhoea and vomiting
Heart muscle damage
Chronic paranoid psychosis
Depression
Schizophrenia
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18
Q

Features of cocaine

A

Naturally occurring stimulant
Coca leaf from south America
Illegal manufacture - leaf, paste, powder
Snorted, smoked, rubbed on, injected
Powder heated with baking soda to make crack - smoked
Strong craving but less dependence and withdrawal syndrome

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19
Q

Acute pscyhoclical effects of cocaine

A

Euphira, well-being
Formication - feels like insects under skin
Irritability and confusion
Hallucinations, paranoia and depression

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20
Q

Acute phsycial effects of cocaine

A

Tachycardia, hypertension, tachypnoea
Dilated pupils
Increased mental excitement
Hyperpyrexia

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21
Q

Chronic effects of cocaine

A
Chest pains, muscles spasm
Weight loss
Perforated nasal septum
Crack keratitis of eyes
Erosion of tooth enamel
Crack callus of fingers
Male impotence, female orgasm problems
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22
Q

Features of cocaine withdrawal

A
Crash rather than true withdrawal
Intense psychological craving
Irritability and depression
Muscle pains, tremor
Hunger
Exhaustion and prolonged sleep
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23
Q

Detection of cocaine and metabolites

A
Blood
Urine
Nasal swabs
Hair
Saliva
24
Q

Commonly misused drugs

A
Opiates 
- morphine, heroin, methadone
Depressants 
- alcohol, barbiturates
Benzodiazepines
- diazepam, temazepam
Stimulants
- amphetamines, cocaine
Hallucinogens
- LSD, mushrooms
Others
- cannabis
- nicotine
- VSA
25
Define drug abuse
An excessive or improper use of drugs | - especially through self-administration for nonmedical purposes
26
Define drug dependence
Physical or psychologic state in which a person displays withdrawal symptoms if drug use is halted suddenly - can lead to addiction
27
Define dependence syndrome
Cluster of behavioural, cognitive and physiological phenomena that may develop after repeated substance use - strong desire to take the drug - impaired control over its use - persistent use despite harmful consequences - higher priority given to drug use than other activities and obligations - increased tolerance and a physical withdrawal reaction when drug use is discontinues
28
Types of benzodiazepines
``` Diazepam - valium, vallies Temazepam - jellies, eggs, temazzies Lorazepam Nitrazepam Chlordiazepoxide ```
29
Types of amphetamines
Amphetamine - uppers, A, speed, whizz, sulph, cranks, wake-up, hearts Dextroamphetamine - dex, dexy, dexies Methamphetamine - ICE, crystal, meth Methylenedioxymethamphetamine - MDMA, ADAM, Ecstasy, E, doves
30
Features of amphetamines
Synthetic stimulants Medical use in narcolepsy and psychiatry Illicit manufacture of tablets/powder Associated with rave culture Taken orally - snorted, smoked or injected Tolerance and psychological dependence occurs
31
Acute psychological effects of amphetamines
``` Euphoria, calm, peace and friendliness Heightened awareness and concentration Increased energy Irritability, restlessness Irrational behaviours, confusion Hallucinations, delusions, paranoia Psychosis ```
32
Acute physical effects of amphetamines
``` Tachycardia, hypertension, tachypnoea Loss of appetite Dilated pupils, brisk reflexes Dry mouth, blurred vision, dizziness Sweating, flushing or pallor Teeth grinding, repetitive actions Pyrexia, dehydration ```
33
Acute adverse effects of amphetamines
``` Arrhythmias Stroke Hyperpyrexia DIC Acute paranoid psychosis ```
34
Effects of cocaine on the heart
``` Premature Atherosclerosis Heart muscle damage - acute catecholamine stress - chronic scarring - cardiomyopathy Fatal arrhythmia ```
35
Effects of cocaine on the brain
``` Brain haemorrhage - intracerebral - subarachnoid Cerebral infarction - arterial spasm ```
36
Features of LSD
LySergic acid Diethylamide Semi-synthetic hallucinogen Derived from lysergic acid - found in ergot fungus which grows on rye grains Synthesised in 1938 - former psychiatric use Taken orally Effects within 1 hour, peak at 4 hours, lasts 12 hours Tolerance develops but not dependence
37
Acute psychological effects of LSD
``` Effect vary widely - good and bad trips Depends on mood and environment Hallucinations - visual and auditory Distorted perception of time, distance and speed Mood swings, paranoia and violence ```
38
Acute physical effects of LSD
``` Hypertension, tachycardia Dilated pupils Tremor and incoordination Flushing and nausea Pyrexia ```
39
Chronic effects of LSD
Tolerance develops but not dependence Abortion in pregnant women Anxiety and psychosis Later flashbacks
40
Types of opiates
``` Morphine Heroin Methadone Dipipanone Pethidine Pentazocine Buprenorphine Dextropropoxyphene Codeine DHC ```
41
Features of opiates
``` Derived from opium poppy - grows in SE and SW Asia Unripe seed capsule scored Milky extract emerges Dries to brown gummy residue Used medically from 13th centaury ```
42
Medical uses of opiates
Pain relief - analgesia Cough suppressants Antidiarrheal drugs
43
Types of heroin
White or brown powder Injected Smoked - chasing the dragon Sniffed
44
Acute psychological effects of opiate abuse
Rush of euphoria Contentment Relief of anxiety Inability to concentrate
45
Acute physical effects of opiates
``` Constricted pupils N+V Suppression of cough reflex Decreased heart rate and breathing Unconsciousness, respiratory arrest and death - naloxone may be necessary Fatal reaction to impurities ```
46
Chronic effects of opiate abuse
``` Tolerance Physical and psychological dependence Constipation Loss of libido Complications of IV injection ```
47
Features of opiate withdrawal
Clinical effects opposite of intoxication | Commences after 8-15 hours, peaks at 36-48 hours, subsides over 5-10 days
48
Symptoms of opiate withdrawal
``` Craving Anxiety, restlessness, irritability Alternate sweating and shivering Generalised aches and weakness Cramps in back, legs and abdo Insomnia Dilated pupils Watering eyes, yawning Tachycardia, hypertension Cold clammy skin with goose flesh Loudly audible bowel sounds N+V and diarrhoea ```
49
Metabolism of heroin
``` Heroin (Diacetylmorphine or diamorphine) -> 6-Mono-Acetyl Morphine (6-MAN) -> Morphine -> Morphine-3-Glucurondie (inactive) and Morphine-6-Glucuronide (active) ```
50
Features of IV abuse of oral pharmaceuticals
``` Tablet crushed, dissolved and infected Gelatinous capsule content Methadone liquid Tablet filler - starch - cellulose - talc - cotton Lung and liver granulomas ```
51
Infections associated with IV injections
``` Septicaemia Acute endocarditis Anthrax Skin abscesses Necrotising fasciitis Hep B,C HIV Opportunistic infections ```
52
IVDA systemic complications
``` Heart - enlargement - endocarditis Lung - scarring - FB granulomas Liver - granulomas Brain - blood vessels - neurones ```
53
Adverse effects of a drug
``` Dose dependent toxic effects Dose independent collateral side effects Idiosyncratic reaction Allergic reaction to impurities Hazards related to route of administration - inhalation - smoking - IV injection Chronic effects - heart, lungs, liver, brains ```
54
Determining lethal drug levels
``` Inter-individual variation Tolerance Cocktail effect Active metabolites Sampling site Older databases are unreliable - sampling site often unknown Therapeutic levels overlap with lethal levels PM redistribution ```
55
Features of PM drug redistribution
PM artefactual elevation of measured drug concentration Passive diffusion of drug from a site of high concentration into neighbouring blood vessels - unabsorbed drug or alcohol in stomach - drug/metabolites accumulated in the liver, lung tissue Central blood vessels most vulnerable - heart blood and aorta - pulmonary arteries and veins - inferior vena cava Depends on anatomical site and time since death Blood from peripheral veins preferred