CHILDREN AND ADOLESCENTS - CNS Flashcards

1
Q

Neurodevelopmental disorders

A

multifaced conditions characterised by impairments in cognition, communication, behaviour and/or motor skills resulting from ‘abnormal’ brain development

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2
Q

emotional and behavioural disorders

A

characterised as either internalizing or externalizing ‘problems’ - tend to occur as a consequence of ‘stressful’ environments/situations

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3
Q

examples of neurodevelopmental disorders

A
  • intellectual disability
  • communication disorders
  • ASD
  • ADHD
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4
Q

examples of emotional and behavioural disorders

A
  • depression
  • anxiety disorders inc. OCD/phobias/tics
  • eating disorders
  • conduct disorders
  • challenging behaviours
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5
Q

unlicensed medicines definition

A

a drug that does not have marketing authority in the UK

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6
Q

off label use of a drug

A

a licensed drug is being used for an unlicensed indication (different doses, form etc.)

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7
Q

what are antipsychotics used for (first and second generation)

A

typical (1st gen.) and atypical (2nd gen.) used for
- psychosis
- bipolar disorder
- ASD associated stereotypes
- compulsions
- aggression and self-injurious behaviour

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8
Q

what symptoms do antipsychotics address?

A
  • delusions
  • paranoia
  • disordered thinking
  • aggression/irritability
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9
Q

which antipsychotic is used in treatment-resistant schizophrenia

A

CLOZAPINE

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10
Q

difference between 1st and 2nd generation antipsychotics

A
  • SGAs less likely to cause extrapyramidal side effects and other symptoms as a consequence of blocked dopamine receptors
  • SGA more cardiac toxic, cause weight gain/hypoglycaemia leading to ‘metabolic syndrome’ - a chronic endocrine disorder
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11
Q

AP monitoring requirements

A
  • weight/BMI: initially and every 3 months
  • U and Es: baseline and yearly
  • blood glucose and lipids: initially and every 3 months
  • prolactin: if symptoms or hyperprolactinaemia present
  • ECG: initially if pt a ‘cardiac-risk’
  • LFTs: baseline and yearly
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12
Q

ADHD - ICD-10 classification meaning

A

hyperkinetic disorder
narrower restrictive term requiring more pervasive and impairing symptoms

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13
Q

ADHD pathophysiology

A

ADHD has a ‘defective inhibitory’ response, the ‘compromised’ pre-frontal cortex cannot filter incoming stimuli

drug treatment enhances noradrenaline and dopamine transmission

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14
Q

dexamfetamine moa on synaptic release

A

facilities release of dopamine from presynaptic cytoplasmic storage vesicles (increase in synapse) and blocks dopamine transporter protein (inhibits reuptake)

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15
Q

methylphenidate moa on synaptic release

A

acts primarily on the dopamine receptor and has little effect on synaptic release

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16
Q

if synaptic concentration is increased…

A

there is greater stimulation of post-synaptic neurons through receptors

17
Q

ADHD first, second and third line meds

A

1st line > stimulants (methylphenidate first then dexamfetamine)

2nd line > atomoxetine OR guanfacine (only SR)

3rd line > clonidine (initiated by specialist)

18
Q

methylphenidate formulations and duration of actions

A

MPH IR > effective for 3-4 hours
MPH SR > Equasym XL 8-10 hours
Medikinet XL > 8 hours
Concerta XL > 12 hours

19
Q

Elvanse formulation for dexamfetamine

A

elvanse is lisdexamfetamine dimesylate SR - which is a prodrug of dexamfetamine, less susceptible to abuse

20
Q

atomoxetine moa

A
  • norepinephrine inhibitor (noradrenaline)
  • reduced chance of misuse compared to stimulants
  • dose according to body weight
  • metabolised by CYP 2D6 (consider hepatic interactions)
21
Q

non-stimulant drugs > guanfacine in ADHD

A
  • sustained release formulation
  • long time to get therapeutic effect (around 2 - 3 weeks)
  • has calming effect (may be useful in aggressive/challenging behaviour and in reducing tics)
22
Q

non-stimulant drugs > clonidine in ADHD

A
  • unlicensed for ADHD
  • 2-3 times a day dosing
  • longest time to reach therapeutic dose (around 150-300mcg/day)
  • drop in BP major side effect
23
Q

which class of drug do guanfacine and clonidine belong to

A

HYPERTENSIVE MEDICATION

24
Q

guanfacine and clonidine side effects due to anti-hypertensive effect

A
  • sleepiness (sedation)
  • headache
  • fatigue
  • abdominal pain
  • nasopharyngitis
  • weight gain
  • drop in BP
25
Q

monitoring for stimulants

A
  • baseline HR and BP: repeat every dose adjustment and every 6 months
  • pre-treatment height and weight on growth chart every 6 months
  • complete medical history
26
Q

treatment of eating disorders

A

primarily psychological therapies, medication is used to address the poor nutritional status and physical health needs

for delusion aspect SGAs or SSRIs

27
Q

prescribing issues in CAMHS

A
  • greater metabolic capacity > rapid elimination of drugs that use hepatic pathways
  • greater efficient renal elimination
  • greater body water and less adipose tissue
  • drug formulation/delivery route
  • some children unable to swallow the drug/can’t tolerate bitter or unpleasant taste