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what are dx criteria for major depressive disorder
- SIG E CAPS
- sleep, interest, guilt, energy, concentration, appetite, psychomotor, suicidal ideaation
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what does 5HT2 stimulate?
5HT3?
- 5HT2-- sexual side effects, akathisia, agitation, insomnia
- 5HT3-- GI Adverse effects--nausea, diarrhea
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what are sexual side effects of antidpressants and how treat?
- delayed orgasm, decreased libido, erectile dysfunction
- change drugs, skip or reduce dose, sildenafil, tadafil, vardenafil
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what are drugs/doses of MAOis, Primary concern?
- phenelzine 15-90 mg
- tranylcypromine 20-60 mg
- isocarboxazid (nonselective) 20-60 mg
- HYPERTENSIVE CRISIS--can occur when combine with high tyramine foods or sympathomimetic drugs
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what is receptor blockade adn SE of MAOis
- ACH effects-- dry mouth, constipation, urinary retention, blurred vision
- Antihistamine effects- sedation, weight gain
- Alpha 1 adrenergic blockade orthostatic hypotension
- ADVERSE EFFECTS--sexual dysfunction, mild anticholinergic effects, ortho static hypo, sedaction insomnia
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What are differences between TCA?
- secondary amines--desipramine, nortriptyline --greater NE relative to 5HT activity
- Tertiary amines--amitriptyline, clomipramine, imipramine, doxepine, trimipramine--greater anticholinergic effects
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what are the conditions TCAs treat
depression, migraine prophylasxis, neuropathic pain, OCD, enuresis, panic disorder, sleep disorders, ADHD
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what drugs have least se /worst se
nest--nortriptyline lease sedation, anticholinergic, orthostatic worse amitrypitline, clomipramine, imipramine
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where do tcas work in body
- serotonin reuptake inhibition
- ne reuptake inhibition
- anticholinergic effects
- alpha 1 blockade
- histamine blockade
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what is general dosing strategy for TCAs
- start with 50 mg and increase by 25-50 mg q 3 days (not nortiriptilyine)
- most 100-300 mg except nortriptyline 50-150
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what are adverse effects of TCAs
- anticholinergic effects,
- antihistamine effects
- alpha 1 adrenergic blockade
- sexual side effects
- cardiac conduction delays--arrhythmias in od
- decreased seizure threshold
- toxic in OD--do not use in acutely suicidal pateitns
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what are SSRIs
- fluoxetine 20-60
- paroxetine 20-50
- sertraline 50-100
- fluvoxamine 100-300
- citalopram 20-60
- excitalopram 10-20
- relatively safe in OD, relatively safe in pt with CV dz
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what are uses for SSRIs
- depression
- social phobia'
- panic disorder
- ocd
- bulimia nervosa
- PTSD
- PMDD
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what are SSRIs adverse effects
- GI--NVD
- sexual side effects
- headache
- insomnia
- fatigue
- agitation
- akathesia and dystonic reactions--5ht can reduce DA levels
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what are specific things for SSRIs
- most likely to cause sedation--paroxetine, fluvoxamine
- paroxetine--mild anticholinergic effects
- fluoxetine--higher rates of ax and nervousness
- sertraline-more diarrhea
-
what are SSRI withdrawal effects
- onst in 24-72 hours and last up to 7-14 days
- shock-like sensations---parathesias, shockline thinling in figners/toes
- GI compliants
- dizziness,
- flu like symptoms
- sleep disturbances
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what is serotonin syndrom
- several serotnergic drugs combiend
- often involves MAOIs as on the drugs
- other serotonergic drugs implicatied
- SSRIS TCAs serotonin releasing agents, destromethorphan, meperidine
- SYMPTOMS-- altered metnal status--confusion, agitation ; autonomic dysfunction--diaphoresis, tachycardia, BP changes, fever
- neruomuscular abnormalities--clonus
- Allow 2 weeks between MAOI and other antidpressent admin--5 weeks for fluoxetine
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how does trazodone work
- MOA--potent 5ht2 receptr antagonist, relatively weak 5ht reuptake inhibition
- most commonly used as a sedative
- antidepressant dose 200-400mg/day
- one of major metabolites in mcpp--non specific serotonin agonsit, anxiogenic, metabolized by CYP2d6
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what are adverse effects of trazodone
sedation, cognitive slowing, dizziness, priapism
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how does nefazodone work
- potent 5ht2 receptor antagonist
- relatively weak 5ht reuptake inhibition
- alpha 1 receptor blockade
- 300-600 mg/day in 2 divided doses
- preserves sleep architecture
- limited use due to hepatic toxicity warning
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how does venlafaxine work and adverse effects
- serotonin reuptake inhibition, NE reuptake inhibition, dopamine reuptake inhibition
- usual dose 75-225
- adverse effects --nausea, constipation, headache, dizziness, nervousness, somnolence, ry mouth, sexual dysfunction , increased BP--
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what is special about bupropion
- NE and dopamine reuptake inhibtion
- no sexual dysfunction
- no weight gain
- not effective for panic disorder, social phobia,
- effective for smokin cessation and sometimes used for ADD
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what are adverse effects of bupropion
- insomnia
- anxxiety
- dry mouth
- tremor
- nausea
- skin reactions
- increased blood pressure
- dose related seizure risk--more common with IR formulation
-
how does mirtazapine work
- antagonism of presynaptic alpha 2 receptors
- block 5ht2 and 5ht3 receptors
- blockade histamine receptors
- adverse effects--increased appetite, weight gain, sedation, dry mouth, constipation--dose 15-45 mg
-
how does duloxetine work/adverse effects
- indicated for MDD, GAD
- NE and Serotonin reuptake inhibitor
- metabolised by CYP 1A2 and CYP 2D6
- Common sE-- nausea, drymouth, fatigue, insomnia, dizziness, constipation, somnolence, increased sweating, decreaed appetite, increased BP--rare--increased LFTs/hepatic failure.
- 40-60 mg
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what cyp does fluvoxamine inhibit
1a2, 2c, 2d6, 3a4
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what cyp does fluoxetine inhibit
2c, 2d6, 3a4
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what cyp does sertraline inhibit
2c, 2d6, 3a4
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what cyp does paroxetine inhibit
2d6
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what cyp does nefazodone inhibit
3a4
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what cyp does bupropion inhibit
2d6
-
what cyp does duloxetine inhibit
2d6
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what drugs inhibtin cyp 1a2
fluvoxamine
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what drugs inhibti cyp2c
- fluovoxamine
- fluoxetine
- sertrailine
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what drugs inhibit cyp2d6
- fluoxetine
- sertraline, paroxetine duloxetine
- bupropion
- (NOT ALOT citalopram, escitalopram, venlafaxine)
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what drugs inhibti 3a4
- fluvoxamine
- fluoxetine
- sertraline
- nefazodone
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what are symptoms of atypcial depression
- weight gain or increased appetite
- hypersomnia
- heavy feeling in arms or legs
- interpersonal rejection sensitivity
- MAOIs greater efficacy than TCAs
- efficacy of SSRIs relative to MAOIs unclear
-
what is melancholic dperession
- subtype of severe depression
- nearly completely absence of capacity for pleausre
- diurnal mood swings--worse in the am
- excessive guilt and eight loss
- unclear if ssris as effectve as TCAs in treatment
- some datea indiate mirtazapine and venlafaxine mroe effective than SSRIs
-
what is a relapse
symptoms return within 4-9 months of recover
-
what s recurrence
symptoms return after 6 to 12 months of recover, increase risk of recurrence after multiple episodes
-
what are the different phases of treatment
- acute phase--goal is remission (absense of symptoms) approximately 6-12 weeks
- CONTINUATION PHASE--goal is to prevent relapse and elminate residual symptoms, approximately 4-9 months
- MAINTENANCE PHASE--prevent recurrence, length of treatment varies depending on history of previous episodes
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