Psychiatric drugs Flashcards
What are the risks of SSRI use during pregnancy?
Cardiac malformations doubled (2% risk)
3-5x risk of pulmonary hypertension in new born
Neonatal adaption syndrome - 10%
What are the methylphenidate medications used for ADHD, and what are their side effects?
Ritalin - fast acting 4 hours
Concerta - long acting - 12 hours
Side effects:
- increased BP
- headaches
- insomnia
- Appetite suppression
- seizures
What is an alternative drug to methylphenidate and how does it work?
Dexamphetamine
- Noradrenaline - dopamine reuptake inhibitor
How does atomoxetine work? what are some side effects and name contraindication:
Noradrenaline reuptake inhibitor
Insomnia
Reduced appetite
Nausea
sexual dysfunction
Phaeochromocytoma
Name some less common use medications for ADHD:
Clonidine: alpha agonist
Bupropion: DA and NA reuptake inhibitor
Modafinil: NA reuptake inhibitor
What should be checked first before starting treatment for ADHD?
Baseline:
- BP
- Weight
**BP and HR need to checked 6 monthly
Which drug is licenced for adolescents with depression, and why?
Fluoxetine
SSRI can induce thoughts of suicide, especially in younger people. Fluoxetine is least likely to do this.
What are some of the common side effects of SSRIs?
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
How long should SSRIs be used for? and what advice should you give the patient taking them?
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
What are the two most common class of drugs prescribed for depression and what drug class do you need to be careful with?
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.
What are some important side effects of TCAs?
Urinary retention
QT prolongation
Arrhythmias
Postural hypotension
Weight gain
Mania - rare
What are some of the major risk factors for suicide?
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)
What screening tests/ monitoring should be done prior/ during lithium administration?
TFTs
- induces hypothyroidism
Parathyroid function
- can induce hyperparathyroidism
Renal function
- induces diabetes insipidus (nephrogenic)
- Reduces glomeruli filtration rate
What warnings should be given to someone taking lithium?
Carry card explaining they are on lithium
Avoid dehydration
- leads to chronic accumulation
Avoid interactive drugs
- NSAIDs
- Diuretics
What is the most common endocrinological side effect of lithium?
Hypothyroidism
What antipsychotic provides the least side effect profile?
Aripiprazole
What investigations or monitoring should be done for people on SSRIs?
FBC - G.I bleeding
U&Es - Hyponatraemia - SIADH
ECG
- if on citalopram - increased risk of QTc elongation