Psychiatric drugs Flashcards

1
Q

What are the risks of SSRI use during pregnancy?

A

Cardiac malformations doubled (2% risk)

3-5x risk of pulmonary hypertension in new born

Neonatal adaption syndrome - 10%

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2
Q

What are the methylphenidate medications used for ADHD, and what are their side effects?

A

Ritalin - fast acting 4 hours

Concerta - long acting - 12 hours

Side effects:

  • increased BP
  • headaches
  • insomnia
  • Appetite suppression
  • seizures
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3
Q

What is an alternative drug to methylphenidate and how does it work?

A

Dexamphetamine

- Noradrenaline - dopamine reuptake inhibitor

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4
Q

How does atomoxetine work? what are some side effects and name contraindication:

A

Noradrenaline reuptake inhibitor

Insomnia
Reduced appetite
Nausea
sexual dysfunction

Phaeochromocytoma

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5
Q

Name some less common use medications for ADHD:

A

Clonidine: alpha agonist

Bupropion: DA and NA reuptake inhibitor

Modafinil: NA reuptake inhibitor

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6
Q

What should be checked first before starting treatment for ADHD?

A

Baseline:

  • BP
  • Weight

**BP and HR need to checked 6 monthly

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7
Q

Which drug is licenced for adolescents with depression, and why?

A

Fluoxetine

SSRI can induce thoughts of suicide, especially in younger people. Fluoxetine is least likely to do this.

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8
Q

What are some of the common side effects of SSRIs?

A

G.I upset

Change in appetite

Hyponatraemia
- especially in elderly

Increased suicidal thoughts
- especially in young

Prolonged QT
- Citalopram

Bleeding
- effect 5HT3 uptake by platelets

Serotonin syndrome

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9
Q

How long should SSRIs be used for? and what advice should you give the patient taking them?

A

A further 6 months on from when they start to feel better

Advice
- do not stop suddenly as will cause flu like symptoms.
Decrease gradually over 4 weeks

or 1 year for anxiety

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10
Q

What are the two most common class of drugs prescribed for depression and what drug class do you need to be careful with?

A

SSRIs
SNRIs

TCAs can be fetal if overdosed on. As such should be avoided or given in low volume to those at risk of suicide.

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11
Q

What are some important side effects of TCAs?

A

Urinary retention

QT prolongation
Arrhythmias
Postural hypotension

Weight gain

Mania - rare

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12
Q

What are some of the major risk factors for suicide?

A

SAD PERSONS

  • Sex - Male
  • Age >40 years
  • Depression
  • Previous attempts
  • Ethanol
  • Rational thinking lost - psychosis
  • Social isolation
  • Organised plan - leaving notes, writing wills
  • No hobbies
  • Sickness (chronic pain)
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13
Q

What screening tests/ monitoring should be done prior/ during lithium administration?

A

TFTs
- induces hypothyroidism

Parathyroid function
- can induce hyperparathyroidism

Renal function

  • induces diabetes insipidus (nephrogenic)
  • Reduces glomeruli filtration rate
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14
Q

What warnings should be given to someone taking lithium?

A

Carry card explaining they are on lithium

Avoid dehydration
- leads to chronic accumulation

Avoid interactive drugs

  • NSAIDs
  • Diuretics
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15
Q

What is the most common endocrinological side effect of lithium?

A

Hypothyroidism

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16
Q

What antipsychotic provides the least side effect profile?

A

Aripiprazole

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17
Q

What investigations or monitoring should be done for people on SSRIs?

A

FBC - G.I bleeding

U&Es - Hyponatraemia - SIADH

ECG
- if on citalopram - increased risk of QTc elongation

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18
Q

What SSRI can increase QT length?

A

Citalopram

“in the Citi” there are long queues

19
Q

Which SSRI should be used in someone with a previous M.I?

A

Sertraline

20
Q

What are some important drug interaction with SSRIs:

A

NSAIDs and Aspirin - should be give PPI alongside

Triptans - increases risk of serotonin syndrome

Warfarin and heparin
- if needed recommended to be placed on mirtazapine

21
Q

How do benzodiazepines works?

A

Bind to GABBA receptors and promote more of an influx of Cl- into the cell, hyperpolarising it.

  • induces calm
  • hypnotic effect
  • muscle relaxation as GABA are found in spinal cord
22
Q

What are the common side effects of benzodiazepines? and what is the serious side effects with an overdose and how is it treated?

A

Impaired motor co-ordination
Drowsiness
Inability to concentrate

Serious:

  • respiratory arrest
  • coma

Flumazenil
*caution if suspected overdosed with other substances

23
Q

How do Barbiturates work?

A

Prolong the opening of GABA receptors increasing Cl- influx

High doses can stimulate the GABA receptors.

  • causing strong CNS depression
  • phenobarbital
24
Q

How long following doses of Clozapine will the dose need to be restarted again slowly?

A

48 hours

25
Q

What are the common side effects of anti-psychotic drugs?

A

Within hours:

  • Acute dystonia (opisthotonus, Torticollis)
  • procyclidine management

Within days:
- Akathisia
(unable to sit still)

Within weeks/ months:
- Parkinsonism

Years:
- Tardive dyskinesia
involuntary facial movements

Other important side effects:

  • weight gain
  • metabolic syndrome
  • QT prolongation (haloperidol)

*increased DVT and stroke risk in elderly patients

26
Q

Which anti-psychotic drugs are less likely to cause adverse effects such as tardive dyskinesia, acute dystonia etc?

A

Atypical/ second generation anti-psychotics:

Risperidone
Olanzapine
Clozapine
Quetiapine

27
Q

After changing the dose of lithium, when will levels need to be rechecked?

A

1 week 12 hours after dose

28
Q

What are the adverse effects of lithium?

A

Nausea and vomiting

Nephrotoxicity / Diabetes insipidus

Thyroid enlargement - hypothyroidism

T wave flattening/ inversion

Hyperparathyroidism - hypercalcaemia

29
Q

What SSRIs are associated with increased risk in pregnancy?

A

Fluoxetine: 3rd trimester persistent pulmonary hypertension

Paroxetine: 1st trimester - congenital heart defects

30
Q

If a patient on lithium develops low mood, constipation, difficult concentrating and abdominal pain - why might this be?

A

Hyperparathyroidism

- hypercalcaemia

31
Q

What are some important side effects of SSRIs?

A

Increased suicide idealisation when first starting
- especially in <25 years

G.I upset/ bleeding

Hyponatremia

Increased QT interval

32
Q

List two SNRI:

A

Venlafaxine

Duloxetine

33
Q

name some TCAs and list some serious side effects:

A
  • Amitriptyline
  • Clomipramine
  • Nortriptyline
  • Imipramine
  • drugs are anti-muscarinic and alpha antagonists.
  • expect side effects accordingly

Side effects:

  • fatal arrhythmias
  • Urinary retention
  • Hypotension
  • sedation
34
Q

In MAOIs what is the chemical which competes with it to cause hypertensive crisis?

A

Tyramine

- which induces wide spread vasoconstriction

35
Q

What type of drug is mirtazapine?

A

Noradrenageric and specific serotonin antidepressant

NaSSAs

36
Q

What is the chronological order of how symptoms from antipsychotics begin?

A

Acute dystonic reactions

Akathisia (inability to sit still, restless)
- days to weeks

Parkinsonism
- weeks to months

Tardive dyskinesia
- months to years

37
Q

Is procyclidine? and when is it used?

A

An anti-cholinergic drug

- used for acute dystonia

38
Q

What are the side effects of hyper-prolactinaemia caused by second generation anti-psychotics?

A
Gynecomastia 
Galactorrhoea 
Infertility 
Osteoporosis 
Breast cancer
39
Q

Outwith lithium, name some other mood stabilisers:

A

Carbamazepine
Lamotrigine
Sodium valproate

40
Q

What are the indications for benzodiazepines?

A
Short term anxiety 
Alcohol detoxification 
Short term insomnia 
Sleep disorders 
Emergancy termination of seizures
41
Q

What patients have a paradoxical reaction to benzodiazepines?

A

Lewy body dementia

- neuroleptic malignant syndrome risk

42
Q

What is the course of ECT?

A

Twice weekly in a course of 6-12 treatments

43
Q

What are some indications to ECT and some side effects?

A

Indications:

  • Unipolar depression
  • Bipolar depression
  • catatonia
  • mania
  • schizophrenia

side effects:

  • most side effects are GA related
  • antegrade memory loss
  • headache
  • increased risk of suicide due to increased motivation to begin with