Antidepressants Flashcards
SSRis
Fluoxetine, olanzapine-fluoxetine, paroxetine, sertraline, fluvoxamine, citalopram, escitalopram
Nonselective norepinephrine-serotonin reuptake inhibitors
Tricyclic:
amitriptyline, nortriptyline, imipramine, doxepin, trimipramine maleate, amoxapine, desipramine, protriptyline hydrochloride, clomipramine
Serotonin-norepinephrine reuptake inhibitors (SNRIs)
Venlafaxine (Effexor), duloxetine, (Cymbalta), milnacipran (Savella), desvenlafaxine (Pristig)
Tricyclic antidepressants:
amitriptyline pharmacodynamics
Act on neurotransmitters, serotonin, and norepinephrine (NE), block reuptake in presynaptic neuron.
and histamine and acetylcholine
Tricyclic antidepressants:
amitriptyline ADRs
paradoxical diaphoresis, causing anticholinergic effects (dry mouth), orthostatic hypotension, sedation, drowsiness
Tricyclic antidepressants:
amitriptyline patient education
Do not discontinue abruptly; avoid OTC medications that stimulate, insomnia or drowsiness.
Must let provider know if having myocardial infarction, glaucoma . avoid in glaucoma
Tricyclic antidepressants:
amitriptyline caution and contraindications
cardiovascular disease
Tricyclic antidepressants:
amitriptyline monitoring
Must report any chest pain
Reassess patient after 2 to 4 weeks of starting medications: suicide, ADRs
Baseline electrocardiography (EKG).
SSRI pharmacodynamics
All SSRIs have selective inhibitory effects on presynaptic serotonin reuptake and weak effects on NE and dopamine neuronal uptake.
Other wording:
affect the serotonin neurotransporter system in the synaptic cleft by blocking the serotonin transporter from returning remaining serotonin to the presynaptic cell. So through this mechanism, more serotonin is available to bind with the postsynaptic receptors.
SSRI ADRs & BBW
CNS, n/v/d, sexual dysfunction
Serotonin syndrome , upper GI bleed, hyponatremia, QTC prolongation, headache
BBW: increased risk of suicidal thinking/behavior in childre, adolescent and young adults.
Major depressive disorder and other psych disorders/
SSRI patient education
May take 2-6 weeks to see maximum effects
Pregnancy: evaluate risk v. benefit
Pediatrics: fluoxetine first line
Withdrawal symptoms if abruptly discontinued
SSRI patient monitoring
Never give more than 4 weeks on first prescription.
Monitor target symptoms.
SNRI indications:
duloxetine, venlafaxine
Major depressive disorder, general anxiety disorder, neuropathy pain, fibromyalgia
SNRI pharmacodynamics
Inhibit reuptake of both norepinephrine and serotonin.
boost dopamine in prefontal cortex
SNRI ADRs
Headache, somnolence, dizziness, insomnia, fatigue, dry mouth, constipation, orthostatic hypotension, erectile dysfunction, ejaculation failure
SNRI patient education
Adherence, suicide ideation, avoidance of OTC medications that stimulate, insomnia or drowsiness, suicide ideation
SNRI monitoring
May increase serum transaminase levels: Watch in patients with liver disease.
Monitor suicide risk, activation of hypomanic or manic symptoms
atypical antidepressants:
buproprion (wellbutrin, zyban) and Mirtazapine (remeron)
pharmacodynamics
Exact mechanism of action unknown
Mirtazapine is a antagonist of 5-HT2, 5-HT3 and histamine (H1) receptors
buproprion (wellbutrin, zyban) and Mirtazapine (remeron) contraindications
seizure disorder
buproprion (wellbutrin, zyban) and Mirtazapine (remeron) ADRs
Bupropion may cause insomnia.
Mirtazapine causes drowsiness, greater at 15 mg/ day than at 30 mg/day.
buproprion (wellbutrin, zyban) and Mirtazapine (remeron) monitoring
depression and suicide
buproprion (wellbutrin, zyban) and Mirtazapine (remeron) patient education
Take mirtazapine before bedtime because it may cause drowsiness
Wellbutrin does not have the sexual dysfunction side effect like SSRIs.
typical antipsychotics
Phenothiazine: chlorpromazine (Thorazine), prochlorperazine.
Non Phenothiazines: haloperidol (Haldol)
atypical antipsychotics
Aripiprazole (Abilify) Clozapine (Clozaril) Olanzapine (Zyprexa) Olanzapine-fluoxetine: Symbyax Quetiapine (Seroquel) Risperidone (Risperdal) Ziprasidone (Geodon)
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol)
pharmacodynamics
Block dopamine receptors in the basal ganglia, hypothalamus, limbic system, and medulla
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol)
side effects
Parkinsonism, prolactin elevation, and extrapyramidal symptoms (EPS); concurrent therapy with anticholinergic
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol)
contraindications
Narrow-angle glaucoma, bone marrow depression, and severe liver or cardiovascular disease
Black Box: increased mortality in older adult patients
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol) ADRs
Neuroleptic malignant syndrome (NMS), EPS, sedation, weight gain
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol)
patient education
drug interactions, avoid sudden withdrawal, sun protection
typical antipsychotics
Phenothiazines: chlorpromazine (Thorazine)
Non Phenothiazine: haloperidol (Haldol) monitoring
Abnormal Involuntary Movement Scale (AIMS)
atypical antipsychotics pharmacodynamics
blocks serotonin receptors in the cortex
atypical antipsychotics contraindications
hepatic and renal disease
atypical antipsychotics ADRs
seizures, weight gain, diabetes, hyperprolactinemia, dizziness, orthostatic hypotension,
Clozapine: fatal agranulocytosis
atypical antipsychotics patient education
ADRs, do not stop taking.
atypical antipsychotics monitoring
symptoms and ADRs
SSRI and other 2nd generation antidepressants are
more effective in pediatric anxiety but not pediatric depression.
fluoxetine is least likely to cause
weight gain.
start low and titrate slow.
long half life… meaning they wont feel bad if they miss a dose by accident
paroxetine (paxil) quickfacts
interacts with a lot of other medications. so try to avoid in the elderly.
has significant withdrawal profile, patients will instantly get side effects.
highest weight gain in all the antidepressants.
can be sedating
citalopram (celeza) BBW
QTC prolongation
ecitalopram (lexapro)
eight neutral, neutral side effects.
geat choice for anxiety or depression.
venlafaxine / desvenlafaxine monitoring:
heart rate and bp.
mirtazepine
low doses causes sedation..
as you increase the dose, it will decrease the sedative factor
bupropion (wellbutrin)
lowers seizure threshold. avoid in pts with seizure risk.
avoid this in patients with anxiety because it spikes fight of flight response
TCAs quick facts
highly cardiotoxic. fatal in overdose. causes serious arrythmias narrow therapeutic index. weight gain is common orthostatic hypotension
MAOIs quick facts
rarely seen in primary care.
interacts with tyramine.
causes HTN crisis.
dangerous in overdose
paroxetine, mirtazapine, amytriptaline
highest association of weight gain
paroxetine is the most
sedating antidepressant
fluoxetine is the most
energizing antidepressant
antidepressants in pregnancy
increased episodes of spontaneous abortion.
risk of stopping antidepressants for mother.
sertraline
ok for lactation
fluoxetine
ok in pregnancy
clinical use for SSRI
depressive, anxiety, panic, obsessive-compulsive disorder, body dysmorphic disorder, bulimia, premenstrual dysphoric disorder, post-traumatic stress disorder, and vasomotor symptoms of menopause.
what nonpharmacologic substances can contribute to serotonin syndrome?
St. John’s wort, grapefruit, ergot, woodrose, SAMe, lithium over the counter
fluoxetine and ecitlopram
FDA approved for use in pediatrics
sertraline and lexapro
lowest dose that goes to baby, usually undetected. can be used in lactation
SSRI should be tapered how?
slowly
desvenfalaxine indications
used for major depression, vasomotor symptoms, fibromyalgia, generalized anxiety, social anxiety, panic disorders, PTSD, which is Post-Traumatic Stress Disorder, postmenstrual dysphoric disorder.
An 8-year-old has been diagnosed with major depression. Which medication is preferred for this patient?
fluoxetine