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Define depression.
dysphoric or depressed state.
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What changes can be a manifestation of depression? (8)
- (SIG-E-CAPS)
- Sleep
- Interest
- Guilt
- Energy
- Concentration
- Appetites
- Psychomotor retardation
- Suicidal ideations
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What is endogenous depression?
Depression that occurs without apparent precipitating cause.
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List (7) other uses for antidepressants.
- Anxiety: doxepin
- Enuresis: imipramine
- Chronic pain syndrome: amitriptyline
- Smoking cessation: bupropion
- Bulimia: fluoxetine
- OCD: fluoxetine, sertraline
- GAD: venlafaxine, paroxetine
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What is the general action of antidepressants:
- Antidepressants prevent the reuptake or breakdown of neurotransmitters.
- Serotonin
- Norepinephrine
- Dopamine
-
List (6) types of antidepressants.
- SSRI: Selective Serotonin Reuptake Inhibitor
- SNRI: Serotonin Norepinephrine Reuptake Inhibitor
- MAOI: Monoamine Oxidase Inhibitor
- TCA: Tricyclic antidepressant
- Tetracyclic: e.g. Mirtazapine (Remeron)
- Other: e.g. buproprion (Welbutrin)
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What are are (5) contraindications to antidepressants?
- Hypersensitivity
- Narrow-angle glaucoma
- Pregnancy
- Lactation
- Immediately after MI
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What are (6) precautions of antidepressant use?
- Older clients with cardiovascular disease
- Elderly with prostate enlargement (urinary retention)
- Anticholinergic effects may require dosage modifications or d/c
- Dosage - slow titration
- Full therapeutic effect may take 3-4 weeks
- May ↓SZ threshold especially with burpropion (Wellbutrin)
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What risk is there when using antidepressants with a suicidal client?
There is an increased risk of suicide as antidepressants start to work, secondary to an increased energy level.
-
What are some "red flags" with suicidal clients?
- Sudden sense of well being
- Giving away prized objects
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What are two classifications of MAO Inhibitors?
- Hydrazines: phenelzine sulfate (Nardil)
- Nonhydrazines: tranylcypromine sulfate (Parnate)
-
What are the pharmacokinetics of MAOIs?
- Absorbed rapidly from the GI tract
- Metabolized in the liver into metabolites
- Excreted mainly in the urine
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What are the pharmacodynamics of MAOIs?
- MAOIs appear to work by inhibiting monoanimine oxidase.
- Monoanimine oxidase normally metabolizes norepinephrine and serotonin, making these neurotransmitters more available to the receptors.
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What are the pharmacotherapeutics of MAOIs?
- Treatment of choice for atypical depression
- Used to treat typical depression when other treatments are unsuccessful; phobic anxieties, neurodermatitus, hypochondriasis, refactory narcolepsy
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What are some precautions with MAOIs?
- Tyramine: Hypertensive crisis
- merperidine (opiod analgesics): hypo- or hypotensive coma or death
- Hypotensive: Additive effect with antihypertensives or spinal anasthesia
- Hypoglycemic: additive effect with oral hypoglycemic or insulin
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Where is tyramine found?
- Food
- TCAs
- levodopa
- amphetamines
- vasoconstrictors
- sympathomimetric drugs
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What foods have tyramines?
- Red wines - beer - liqueurs
- aged cheese
- processed meats - smoked or pickled fish
- chicken or beef liver pate
- yeast, yogurt
- fava beans
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What may be used to treat hypertensive crisis?
phentolalamine (Regitine) - off label use
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Describe the first-pass effect.
- Many oral drugs undergo deactivation and sometimes activation when altered by hepatic metabolism.
- Alternative routes can bypass the first-pass effect e.g. sublingual, rectal, or parenteral.
-
What are (4) common TCAs?
- imipramine hydrochloride (Tofranil)
- amitriptyline hydrochloride (Elavil)
- amoxapine (Acendin)
- nortriptyline hydrochloride (Aventyl, Pamelor)
-
What are the pharmacokinetics of TCAs?
- Absorbed completely when PO
- First-pass effect
- Metabolized in liver
- excreted in urine
- Extremely fat-soluble (long half-life)
-
What are the pharmacodynamics of TCAs?
Increases NOR and serotonin by preventing reuptake and storage in presynaptic nerves.
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What are the pharmacotherapeutics of TCAs?
- Treat episodes of major depression
- Less effective with:
- .... hypochondriasis
- .... atypical depression
- .... depression with delusions
- Inverstigated for use with:
- .... migraine headaches
- .... phobias
- .... urinary incontinence
- .... attention deficit disorder
- .... ulcers
- .... diabetic neuropathy
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What are TCA drug-drug interactions?
- Many commonly used drugs
- May prevent therapeutic response to some antihypertensives
- Additive effect with drugs with anticholineric effects
- cimetidine (Tagamet) impairs metabolism
-
What are some adverse reactions with TCAs?
- Orthostatic hypertension
- Arrhythmias
- Sedation
- Increase risk in the elderly
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What is the advantage of SSRIs?
They have fewer side effects TCAs and MAOIs
-
List (3) common SSRIs.
- fluoxetine hydrochloride (Prozac)
- paroxatine hydrochloride (Paxil)
- sertraline hydrochloride (Zoloft)
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What are the pharmacokinetics of SSRIs?
- Almost completely absorbed when PO
- Highly protein bound
- metabolized in liver
- excreted in urine
-
What are the pharmacodynamics of SSRIs?
Selectively inhibits neuronal reuptake of the neurotransmitter serotonin
-
What are the pharmacotherapeutics of SSRIs?
- Treat major depressive episodes.
- Depending on the SSRI:
- .... anxiety disorders
- .... eating disorders
- .... personality disorders
- .... impulse control disorders
-
What are SSRIs drug-drug interactions?
- Competitively inhibits a liver enzyme that is responsible for the oxidation of numerous drugs.
- MAOIs: can cause serious and potentially fatal reactions.
-
What are some adverse reactions with SSRIs?
- Anxiety
- Insomnia
- Sleepiness
- Palpitations
- Serotonin Syndrome
-
What causes Serotonin Syndrome?
- The excessive accumulation of serotonin.
- May be due to Rx and/or OTC meds
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What are signs and symptoms of Serotonin Syndrome?
- At least three of the following:
- .... change in MS
- .... agitation
- .... myoclonus
- .... hyperreflexia
- .... fever
- .... diaphoresis
- .... ataxia
- .... diarrea
- May include:
- .... abdominal pain
- .... ↑BP
- .... tachycardia
- .... ↑ motor activity
- .... mood changes
- Severe reactions:
- .... high fever
- .... cardiovascular shock → death
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List (5) miscellaneous antidepressants.
- maprotiline hydrochloride (Ludiomil)
- mirtazapine (Remeron)
- bupropion hydrochloride (Wellbutrin)
- venlafaxine hydrochloride (Effexor)
- trazodone hydrochlorine (Desyrel)
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Define bipolar disorder.
- Mood swings of extreme euphoria and Depression
- Mania: catecholamine stimulation
- Depression: diminished catecholamine stimulation
-
What medications are used to treat bipolar disorder?
- lithium carbonate (Eskalith)
- divalproex (Depakote)
- lamotrigine (Lamictal)
- Carbamazepine (Tegretol)
- Oxcarbazepine (Trileptal)
- Topiramate (Topamax)
- Tiagabine (Gabitril)
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What are the pharmacokinetics of lithium?
- Absorbed rapidly and completely when PO
- Distributed to body tissues.
- Crosses placenta; enters breast milk
- Not metabolized
- Excreted unchanged by kidneys
-
What are the pharmacodynamics of lithium?
- Regulates catecholamine release in CNS:
- .... increases NOR and serotonin uptake
- .... reduces the release of NOR from synaptic vesicles in presynaptic neuron
- .... inhibits NOR's action in postsynaptic neuron
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What are the pharmacotherapeutics of lithium?
Treatment of acute mania and prophylaxis of recurrance
-
What are lithium drug-drug interactions?
- Therapeutic Range (TR): 0.5 - 1.5 mEq/L (narrow)
- Serious reactions can occur
-
What are some adverse reactions with lithium?
- Salt restricted diet can cause toxicity
- .... vomiting
- .... diarrhea
- .... tremor
- .... muscle weakness
- .... slurred speech
- .... decreased coordination
- .... drowsiness
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What are neuroleptics?
Antipsychotic drugs
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What are the pharmacotherapeutics of neuroleptics?
- Schizophrenia
- Acute mania
- Psychotic depression
- Schizoaffective disorders
- Drug induced psychosis
- Children with extreme behavior
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What are some off label uses of neuroleptics?
- agressive, disruptive, and delusional behavior
- Hallucinations
- Anxiety
- Insomnia that sometimes accompanies Alzheimer's disease
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What is the action of antipsychotic drugs?
- Block dopamine receptors; D 1,2,3,4,5
- D 2,3,4 haave been associated with mental illness
-
What are the pharmacodynamics of aripiprazole (Abilify)?
- Dopamine stabilizer
- .... When dopamine is too low → Abilify enhances it
- .... When dopamine is too high → Abilify reduces it
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What are some adverse reactions of antipsychotic drugs?
- Most are EPS
- Treat with anticholinergic meds:
- .... benztopine (Cogentin)
- .... diphenhydramin (Benadryl)
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What are Extra-Pyramidal Symtoms (EPS)?
- Dystonia (acute)
- Pseudo-parkinsonium
- Akathisia
- Tardive dyskinesia
- Neuroleptic Malignant Syndrome (NMS)
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What is dystonia?
- Muscle rigidity and cramping
- .... stiff neck
- .... thick tongue
- .... swallowing issues
-
What is pseudo-parkinsonium?
-
What is akathisia?
- Intense desire to move
- "Can't stay still"
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What is tardive dyskinesia?
- Permanent involuntary movement
- .... lip smacking, chewing, tongue protrusion,
- .... blinking, chorieform limb movements
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What is Neuroleptic Malignant Syndrome (NMS)
- Can be fatal
- High fever
- rigidity
- unstable blood pressure
- delirium
- elevated enzymes
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What is psychosis?
A break from reality.
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What is meant by positive or negative symptoms?
- Positive symptoms are thoughts, behaviors, or sensory perceptions present in a person with a mental disorder, but not present in people in the normal population.
- Negative symptoms are thoughts, feelings, or behaviors normally present that are absent or diminished in a person with a mental disorder.
- (http://www.minddisorders.com/Ob-Ps/Positive-symptoms.html)
- (http://www.minddisorders.com/Kau-Nu/Negative-symptoms.html)
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What are positive symptoms of psychosis?
- Hallucinations: can effect any of the senses
- Delusions: a false or fixed belief.
-
What are negative symptoms of psychosis?
- Affect disturbance
- Anergia
- Alogia
- Avolition
- Ambivalence
- Anhedonia
-
What is anergia?
- A lack of energy
- (Taber's Dictionary of Medical Terms)
-
What is alogia?
- Completely speechless.
- (Taber's Dictionary of Medical Terms)
-
What is avolition?
- "A general lack of desire, drive, or motivation to pursue meaningful goals".
- (http://en.wikipedia.org/wiki/Avolition)
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What is ambivalence?
Simultaneous opposite feelings regarding something
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What is anhedonia?
Inability to experience pleasure
-
What is the general action of typical (traditional) antipsychotic drugs and what are they used to treat?
They block D 2,3,4 dopamine receptors. They are used to treat negative symptoms of schizophrenia and have no effect of positive symptoms
-
What is the general action of atypical antipsychotic drugs and how are they used?
- They are weaker D2 dopamine receptor blockers so:
- .... less risk of EPS
- .... less risk of TD (Tardive Dyskinesia)
- They effectively treat positive and negative symptoms
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What are the two major groups of typical antipsychotics drugs and their attributes?
- Phenothiazines: chloropromazine (Thorazine)
- .... low potency
- .... high sedation
- .... low EPS
- Nonphenothiazines: haloperidol (Haldol)
- .... high potency
- .... low sedation
- .... high EPS
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List (6) atypical antipsychotic drugs and their main adverse reactions.
- clozapine (Clozaril): argranulocytosis, seizures (monitor WBCs)
- olanzapine (Zyprexa): weight gain
- aripiprazole (Abilify): anxiety
- risperidone (Risperdal): can have prolactin issues
- quetiapine (Seroquel): sedation
- ziprasidone (Geodon): Q-T wave prolongation
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What is/are nursing interventions for dystonic Rxn?
- Administer medication
- Reassure client
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What is/are nursing interventions for Tardive Dyskinesia?
Use AIMS scale, report score
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What is the AIMS scale?
Abnormal Involuntary Movement Scale
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What is/are nursing interventions for NMS?
- Stop antipsychotic meds
- Notify PCP immediately
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What is/are nursing interventions for akathisia or EPS?
- Administer meds as ordered
- Assess for effectiveness
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What is/are nursing interventions for seizures?
- Protect client from injury
- Stop meds
- Notify PCP
- provide privacy
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What is/are nursing interventions for sedation?
Caution about alert activities (car driving)
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What is/are nursing interventions for photosensitivity?
- Avoid exposure
- Wear sunscreen
- Wear protective clothing
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What is/are nursing interventions for sexual dysfunction?
Teach client to inform PCP or impotence or diminished libido
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What is/are nursing interventions for weight gain?
- Encourage balanced diet
- Encourage regular exercise
- Focus on minimizing gain
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What is/are nursing interventions for anticholinergic effects?
- Ice chips
- Sugarless hard candy
- Should decrease with time, if not notify PCP
-
What is/are nursing interventions for constipation?
- Increase fluid
- Increase dietary fiber
- May need stool softener
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What is/are nursing interventions for urinary retention?
Teach to report if no improvement
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What is/are nursing interventions for orthostatic hypotension?
- Teach to rise slowly from lying to sitting or standing
- Do not ambulate until no longer dizzy or light headed.
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