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52 Cards in this Set
- Front
- Back
how long does major depressive syndroem last?
peak age of onset? mortality rate? |
more than 2 weeks
25 yo 15% |
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which type of depression is most common
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reactive depression (associated with adverse life events, drugs/alcohol, mental d/o)
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definition of rapid cycling bipolar d/o
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4+ mood swings or episodes in 12 month pd
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peak age of bipolar d/o
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19 yo
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pathogenesis of major depression
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norE, 5HT (or both) deficiency
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examples of TCAs
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imipramine
amitriptyline desipramine |
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MOA of TCA
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blcks norE and/or 5HT reuptake w/i hours
stimulates histamine, muscarinic, and a-receptors outside CNS |
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which TCA has the least amt of side effects
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desipramine
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what in combo with TCA --> acute HTN and cardiac arrhythmias
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sympatothomimetics
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which drug is absolutely contraindicated with TCA
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MAOIs (inhibits TCA metabolism)
--> tremors, hyperthermia, convulsions, coma, cardiac toxicity ad death (5HT syndrome) |
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what drugs can enhance metabolism of TCA? inhibits?
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p450 inducers (some anti-convulsants)
p450 inhibitors (SSRIs) |
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Effects of TCA Od
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coma
shock metabolic acidosis respiratory depression agitation delirium, seizures |
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Which drugs are second generation heterocyclics
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buproprion
maprotiline amoxapine |
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which drug is 1st line to treat depressive phase of bipolar
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buproprion
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d
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d
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MOA buproprion
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weak blocker of norE and 5HT reuptake
blocks DA reuptake --> psychosis |
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Adverse effects of buproprion
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CNS stimulation
incresaed risk of seizures can worsen panic and OCD |
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contraindications of buproprion
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MAOIs
h/o bulimia seizure d.o caution if pregnant |
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uses of maprotiline
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depression w/ anxiety or sleep probs
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MOA maprotiline
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potenet norE uptake inhibition
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adverse effects of maprotiline
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seizures
psychosis and hallucinations sedative and anit-muscarinic actions orthostatic hypotension |
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contraindication of maprotriline
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MAOIs
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use of amoxapine
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dperession in psychotic pts (metabolite of anytpsych med loxapine)
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MOA amoxapine
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reduces reuptake of norE and 5HT
blocks DA receptors, alleviating psychosis |
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adveerse effects of amoxapine
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seation
antimuscarinic effects orthostatic hypotension |
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contraindications of amoxapine
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MAOIs
nursing mothers/pregnancy |
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which drugs are 3rd generation heterocyclics?
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mirtazapine
venlafaxine |
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indications for 3rd generation heterocyclics
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major depressive syndrome
severe reactive depression |
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uses of mirtazapine
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depression assoc with anxiety/sleep disturbances
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MOA mirtazapine
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antagonist at presynaptic 5HT2 and 5HT3 receptors
prevents serotonin activating autofeedback loop, which would otherwise reduce levels of extracellular 5HT potenet H1 antagonist moderate muscarinic antagonist |
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adverse effects of mirtazapine
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H1 antagonist (sedation, weight gain)
a-1 antagonist (orthostatic hypotension) muscarinic antagonist (few muscarinic effects) |
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uses of venlafaxine
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GAD
OCD |
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MOA venlafaxine
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inhibits 5Ht, norE and DA reuptake
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adverse effects of venlafaxine
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sexual side effects
nausea anxiety nervousness insomnia hypertension, agitiation tremors sweating |
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contraindications of venlafaxine
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MAOI
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which heterocyclic is not contraindicated with MAOIs?
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mirtazapine
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which drug class is a first lne chice for depressive phase of bipolar d/o
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SSRIs
buproprion |
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MOA of SSRIs
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inhibits 5HTH reuptake
weak effects on norE and DA reuptak e |
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examples of SSRIs
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fluoxetine
sertralin e paroxetine |
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which SSRI has the longest t1/2
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fluoxetine (7-9 days)
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SSRI drug interactions
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inhibit p450 enzymes
MAOI contraindicated!!! --> 5HT syndrome |
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MAOI examples
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phenelzine
tranylcypromine |
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MOA of MAOIs
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inhibits MAO-A (degrades norE, 5HT, tyramine) and MAO-B (degrades DA)
MAO-A inhibition likely more impt |
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adverse effects of MAOIs
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CNS stimulation
weight gain dizziness angina bronchospasm drowsiness elevated liver enzyme levels |
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how long does phenelzine last?
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2-3 weeks, it's an irreversible inactivator... must wait for MAO to be regenerated to terminate phenlzine activity
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what does MAOI + tyramine do
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hypertensive crisis
MAO normally metabolizes tyramine, but it can't so tyramine displaces norE --> vasocontstriction |
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W/d from anti-depressants
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can lead to "discontinuation syndrome"
--> fatigue, nasuea, insomnia, anxiety, blurred vision, halluciniations, etc |
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which drugs tend to have w/d sx
which doesn't cause probs |
those with short t1/2
fluoxetine doesn't usually cause probs |
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indications for lithium
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manic phase of bipolar
for severe mania, use with fast-acting antipsychotic drugs or potent benzos can be used adjuncctively for psychoses, schizoaffective and refractory cases of major depression |
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MOA lithium
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selective depression in overactive circuits involved in mania (alters Na transport necessary for generating actioin potentials in nerve cells)
modulates NT activity inhibits normal recycline of inositol substrates in neuronal membranes |
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adverse effects of lithium
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polydipsia
polyuria AVOID dehydration weight gain thinning of hair teratogenic TOXICITY CAN OCCUR AT THERAPEUTIC DOSE... VERY NARROW THERAPEUTIC INDEX |
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interaction of lithium and Na
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competes with Na for renal uptake (na retention increases lithium clearance and na depletion increases li retetion
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