psychopharmacology Flashcards
(97 cards)
indications of SSRIs
- moderate/severe depressive episodes (all SSRIs)
- dysthymia
- GAD (paroxetine)
- chronic pain
- schizoaffective disorder
- OCD
- panic disorder (citalopram, escitalporam, paroxetine)
- social phobia (escitalopram, paroxetine)
- PTSD (paroxetine, sertraline)
- impulsivity associated w personality disorders
when do we deem no imporvement w antidepressants
at least 2 months
antidepressant classifications
TCAs - tricyclic antidepressants
MAOIs - monoamine oxidase inhibitors
SSRIs - selective seotonin
SNRIs
what are TCAs
indications
imipramine, amitryptilline
lethal in overdose
QT prolongation and arrhytmias
indications
- depressive illness, nocturnal enuresis in children, neuropathic pain
SEs of TCAs
CIs
sedation, weight gain - antoihistaminc - anticholinergic - SLUDGE OPPOSITE - antiadrenergic - orthostatic hypotension, libido confusion/delirium gynaecomastia/galactorrhoea
CIs - recent MI, arryhthmias, mania, sever liver disease, agranulocytosis
MAOIs
indications
inhibit monoamine oxidase A and B present at nerve terminals
irreversible - phenelzine, isocarboxide
reversible - moclobemide - good for atypical depression
indications
- third line for depression or treatment resistant depression
- social phobia
TYRAMINE CHEESE REACTION
hypertensive crisis - tyramine reaction
avoid certain foods such as peas, wine, processed meats as they contain high amounts of tyramine - high MAOIS inhibitor increase tyramine increase catecholamines leading to HTN crisis - CVS events ie stroke
clinical features
- headache, palpitations, fever, convulsions, coma
serotonin syndrome
SEs of MAOIs
CVS - OH, arrhythmias
neuropsychiatric - drowsy/insomnia, headache
GI - increased appetite, weight gain
libido, dry mouth
hepatic - increased LFTs
hypertensive reaction with tyramine containing foods
SSRis
which one is used post MI
in children and adolescents
block reuptake of serotonin
sertraline
fluoxetine
SEs of SSRIs
SEs - GI upset - GI bleeding - PPI libido anxiety restlessness nervousness insomnia fatigue sedation dizziness
what is discontinuation syndrome and its effects
when you stop SSRIs
restlessness
problems sleeping
unsteadiness
sweating
abdominal symptoms
altered sensations (for example electric shock sensations in the head)
altered feelings (for example irritability, anxiety or confusion).
cons of paroxetine
sign CYP2D6 inhibition sedating weight gain more AntoACH effects discouraged during pregnancy likely to cause discontinuation syndrome
pros of sertraline
very weak p45o INTERACTIONS and only slight CYP2D6
short half life w lower build up of metabolites
less sedating
safest in cardiac disease
cons of sertraline
max absoprtion requires a full stomach
Increase number of GI adverse drug interactions
pros of fluoxetine
long half life. less incidence of discontinuation
activating NOT SEDATION
cons of fluoxetine
long half life and active metabolite build up
significant P450 interactions
intiial activation - increase anxiety ad insomnia
more likely to induce mania
pros and cons of citalopram
PROS
low inhibition of P450 enzymes so fewer drug-drug interaction
what is SNRIs
inhibit both serotonin and noradrenergic reuptake but WO antihistamine
pros fo venlafaxine
minimla drug interactions
short half life ad fast renal clearance
cons of venlafaxine
can increase diastolic BP
sig nausea
Bad discontinuation syndrome - taper recommeded after 2 weeks of administation DUE TO ITS LONG HALF L
casue QT prolongation
sex
duloxetine pros and cons
helps w physcial Sx of depressionie headaches, pain
CONS
CYPD26 and CYP1A2 inhibitor
cannot break capsule as active ingredient not stable within the stomach
mitrazapine pros
atypical antidepressant
noradrenaline and specific serotonin antidepressant receptor
5HT2 and 5HT3 recepetor antagonist
hypnotic at lower dose
CONS
increased appetite and weight gain
SSRIs drug interactions
taking NSAIDs increase GI bleeding so if given co-prescribe PPI
warfarin/heparin - consider mitrazapine instead
triptan drugs for migraine - increased risk of serotonin syndrome
MAOIs - increased risk of serotonin syndrome
if taking heprain aspirin warfarin what can be prescribed for depression
mitrazapine
inidcations for mood stabilisers
bipolar
cyclothymia
schizoaffective
augmentation in treatment resistant depression