SSRIs Flashcards
citalopram
celexa
escitalopram
lexapro
fluoxetine
prozac
fluvoxamine
luvox
paroxetine
paxil
sertraline
zoloft
MOA of SSRIs
increase serotonin activity by decreasing action of the presynaptic serotonin uptake pump
indications for SSRIs
- anxiety d/o (OCD, panic, SAD, PTSD, GAD)
- anorexia/bulimia nervosa
- premenstrual dysphroic disorder
- MDD, dysthymia
- with a mood stabilizer for bipolar depression
- some efficacy in pain syndromes (migraine or chronic pain)
- may be effective in impulse control d/o and emotional physical symptoms of menopause
dosing of SSRIs
QDaily
is there a linear relationship between SSRI dose and response?
NO, don’t have to max out dose before switching drugs
which disorders require high dosing of SSRIs?
OCD, anorexia/bulimia nervosa (may even be BID)
which disorders only need low dosing of SSRIs?
panic
metabolism of SSRIs
CYP450 in the liver EXCEPT celexa and lexapro
time to steady state for SSRI?
5 days for everything but prozac (over a month)
how long until symptoms are alleviated from SSRIs?
2-4 weeks
how long should SSRI treatment be continued before it is considered refractory?
6-8 weeks
is the lack of a response to one SSRI predictive of effectiveness of another?
NOPE
is measuring plasma levels indicated for SSRIs?
NOPE
are SSRIs safe in overdose
YUP
can SSRIs induce mania or rapid cycline in bipolar patients?
YUP, just like all other antidepressants
what do SSRIs have on TCAs and MAIOs int he side effects category?
- NO orthostatic hypotension (not blocking adrenergic receptors)
- LESS sedation (minimal action on histamine)
- NO dry mouth, constipation, blurred vision, urinary retention (minimal muscarinic cholinertic recepto action)
- LOWER seizure rate than TCAs
time-limited side effects of SSRIs?
nausea, jitteriness
sexual dysfunction side effects of SSIRs?
usually not time limited, most common SE (loss of libido, inability/delayed orgasm, nonsustaining erection)
GI side effects of SSIRs?
diarrhea and nausea, usually resolves in a few days, food may help, may cause a decreased appetite
CV side effects of SSIRs?
main issue is QT prolongation
which SSRI has an FDA warning about CV effects?
citalopram
are headaches a side effect of SSIRs?
usually transient and occur at the start of treatment but can persist in some
worst SSRI offender for headaches?
prozac
CNS side effects of SSIRs?
anxiety, insomnia, sedation, somnolence, emotional blunting, yawning
worst SSRI offender for anxiety?
prozac (time limited)
worst SSRI offenders for insomnia?
prozac and zoloft (take in the AM, duh)
worst SSRI offenders for sedation?
paxil and luvox (take at night)
why can people yawn when on SSRIs?
effect on hypothalamus, not related to being tired
hematologic side effect of SSIRs?
platelet dysfunction, not reduction in the number (remember that serotonin is in platelets too) -> they bleed
pregnancy category of SSIRs
C = teratogenic and should be avoided if possible
can patients breast feed while on SSRIs?
NO, SSRIs are secreted in breast milk
is there a difference in drugs within the SSRI class?
NOPE, but may be patient specific
what meds should patients taking SSRIs avoid?
other meds that effect serotonin (SEROTONIN SYNDROME) - triptans and tramadol
who is at greatest risk for serotonin syndrome?
drug-drug interactions
presentation of serotonin syndrome
nausea, diarrhea, restlessness, extreme agitation, hyperreflexia, autonomic instability (fluctuations in vitals), myclonus, seizures, coma, CV collapse
treatment of serotonin syndrome
benzos for agitation
cyrohepadine for serotonin antagonism
SSRI discontinuation syndrome
some patients may experience transient dizziness, lethargy, nausea, irritabilitiy and headache
worst offenders for SSRI discontinuation syndrome
paxil and luvox
how can SSRI discontinuation syndrome be prevented?
slowly tapering over several weeks
considerations when selecting an SSRI
patient response to prior antidepressants, comorbid illness, family history of response to antidepressants
which SSRIs can be used in kids?
prozac (MDD/OCD) and zoloft (OCD)
FDA black box warning for SSRIs
SUICIDE in kids and young adults - lower risk as age rises
Worst SSRI offender of GI disturbance
Zoloft
Only SSRI approved for OCD
Luvox