Chapter 4: Psychopharmacology Flashcards
Neurotransmitter, Psychotropic Medication, Receptor
In the mid-20th century, what pivotal drug class was introduced in the US for the treatment of individuals with mental illness?
phenothiazine
Phenothiazine is a type of anti________
antipsychotic
In early 20th century France, _________ had been use as a preoperative medication.
phenothiazine
Historically, reaction and treatment of individuals with mental illness ranged from benign to __________________
fear, inhumane, demonic, loathsome, mistreatment.
In the early 20th century, we saw the use of some somatic therapies in psychiatry including __________________________
insulin shock, wet sheet packs, ice baths, electroconvulsive therapy, psychosurgery
Before 1950, __________ and _____________ were the only significant psychotropic medications available
amphetamines, sedatives
True or False: Psychotropic medications cure mental illness.
False!
Meds are used to relieve some psychiatric and behavioral symptoms.
Typically meds are used as an adjunct to therapy.
Patient’s have a right to refuse medications; however the exceptions are…..
if a patient will hurt them selves or others
Keep in mind…
many states have laws that allow courts to order outpatient treatment
What is “Kendra’s Law”?
A young woman, Kendra Webdale was pushed in front of a NYC subway by a man who was not seeking treatment for his mental illness.
Again many states have the legal authority to court order mental health treatment for a dangerous individual.
Why is a thorough initial assessment important before a patient begins psychopharmacological therapy.
Set patient’s baseline.
Why is an ethnocultural assessment necessary?
Genetic variations in select populations may influence response to some medications
Which enzyme is tested for individuals at risk for being poor metabolizers of certain medications?
CYP450 isoenzyme variations
This enzyme influences metabolism of some medications.
What is continuously monitored after administering a psychotropic medication?
side effects, adverse events, therapeutic effectiveness
Why must a nurse be familiar with psychotropic medications?
to anticipate potential problems and outcomes associated with medication
What is the nurse responsible for while teaching to the patient?
- Why the med has been prescribed
- When it should be taken
- What possible side effects and adverse reactions could occur
- Whom to contact with questions/concerns
in 2015, the FDA required that drug labeling includes more specific information on _________
pregnancy-associated risks
What is a neurotransmitter?
A chemical that is stored in the axon terminals of the presynaptic neuron. An electrical impulse through the neuron stimulates the release of the neurotransmitter into the synaptic cleft, which in turn determines whether another electrical impulse is generated.
What is a receptor?
Molecules situated on the cell membrane that are binding sites for neurotransmitters
Most psychotropic meds have their effects at the _________ _________, producing changes in ___________ release and the _________ to which they bind.
neuronal synapse; neurotransmitter; receptors
Researchers hypothesize that most antidepressants work by __________________
blocking the reuptake of neurotransmitters, specifically SEROTOTONIN AND NOREPINEPHRINE.
Researchers hypothesize that most antidepressants work by blocking the reuptake of neurotransmitters, specifically ________ & ______
serotonin and norepinephrine
Reuptake is the process of what?
the process of neurotransmitter inactivation by which the neurotransmitter is reabsorbed into the presynaptic neuron from which it had been released.
Blocking the reuptake process therefore allows more of the neurotransmitter to be available for neurotransmission.
However, some antidepressants also block receptor sites that are UNRELATED to their mechanism of action these receptors include_________________
What is the consequence of this
a-adrenergic, histaminergic, and muscarinic cholinergic receptors
side effects
SSRIs action on neurotransmitter and/or receptor
inhibit reuptake of serotonin (5-HT)
SSRIs physiological effects
reduce depression
control anxiety
control obsessions
SSRI side effects
nausea
agitation
headache
sexual dysfunction
SSRI examples
citalopram (Cipramil)
dapoxetine (Priligy)
escitalopram (Cipralex)
fluoxetine (Prozac or Oxactin)
fluvoxamine (Faverin)
paroxetine (Seroxat)
sertraline (Lustral)
vortioxetine (Brintellix)
Tricyclic antidepressants action on neurotransmitter and/or receptor
inhibit reuptake of serotonin
inhibit reuptake of norepinephrine
Block norepinephrine receptor
Block ACh receptor
Block histamine receptor
tricyclic antidepressants physiological effects
reduce depression
relief of severe pain
prevent panic attacks
tricyclic antidepressants side effects
sexual dysfunction
sedation
weight gain
dry mouth
constipation
blurred vision
urinary retention
postural hypotension and tachycardia
MAO inhibitors action on neurotransmitter and/or receptor
Increase norepinephrine and serotonin by inhibiting the enzyme that degrades them (MAO-A)
MAO inhibitors physiological effects
reduce depression
control anxiety
MAO inhibitors side effects
sedation
dizziness
sexual dysfunction
hypertensive crisis (interaction with tyramine)
Trazodone and nefazodone action on neurotransmitter and/or receptor
5-HT reuptake block 5-HT2 receptor antagonism
adrenergic receptor blockage
Trazodone and nefazodone physiological effects
reduce depression
reduce anxiety
Trazodone and nefazodone side effects
nausea
sedation
orthostasis
priapism
SNRI: venlafaxine, desvenlafaxine, duloxetine, and levomilnacipran action on neurotransmitter and/or receptor
potent inhibitors of serotonin and norepinephrine and reuptake
weak inhibitors of dopamine reuptake
SNRI physiological effects
reduce depression
relieve pain of neuropathy (duloxetine)
relieve anxiety (venlafaxine)
SNRI side effects
nausea
increased sweating
insomnia
tremors
sexual dysfunction
Bupropion action on neurotransmitters and/or receptor
inhibits reuptake of norepinephrine and dopamine
Bupropion physiological effects
reduces depression
aids in smoking cessation
decreases symtoms of ADHD
Antipsychotics: phenothiazines and haloperidol physiological effects
relief of psychosis
relief of anxiety
(some) provide relief from nausea and vomiting and intractable hiccoughs
antipsychotics: phenothiazine and haloperidol side effects
blurred vision, dry mouth, decreased sweating, constipation, urinary retention, tachycardia, sedation, weight gain, ejaculatory difficulty
Antipsychotics (SECOND generation, ATYPICAL):
aripoprazole, asenapine, brexpiprazole, clozapine, iloperidone, lurasidone, olanzapine, paliperidone, quetiapine, risperidone, ziprasidone action on neurotransmitter
receptor antagonism of serotonin and dopamine
Second generation antipsychotics, atypical physiological effects
relief of psychosis
relief of anxiety
relief of acute mania
Second generation antipsychotics, atypical side effects
sedation, weight gain, diabetes, orthostasis, dizziness, blurred vision, dry mouth,
antianxiety: benzodiazepines action on neurotransmitter and/or receptor sites
Bind to BZ receptor sites on the GABA receptor complex; increase receptor affinity for GABA
antianxiety: benzodiazepines physiological effects
relief of anxiety
sedationa
antianxiety: benzodiazepines side effects
dependence
confusion
memory impairment
motor incoordination
antianxiety: busprione action on neurotransmitter
serotonin agonist
dopamine agonist
dopamine antagonist
antianxiety: busprione physiological effects
relief of anxietya
antianxiety: busprione side effects
nausea
headache
dizziness
restlessness
Although each psychotropic medication affects neurotransmission, the specific drugs within each class have varying neuronal effects. Their exact ____________ are unknown
mechanisms of action
anxiety meds are also called
anxiolytics
what is an anxiolytic
another name for antianxiety medicaion
Anxiolytics can treat
anxiety, acute alcohol withdrawl, skeletal muscle spasms, convulsive disorders, preoperative sedation
True or false: anxiolytics are used for long term treatment of anxiety
False
They are most appropriate for acute anxiety states rather than long-term
For longer term management a patient may be prescribed antidepressants
Antianxiety meds depress subcortical levels of the ____________
Central nervous system, particularly the limbic system and reticular formation
The most commonly prescribed antianxiety agents are
benzodiazepines:
- clonazepam (Klonopin)
- diazepam (valium)
- alprazolam (xanax)
Benzodiazepines are much like ________ in their effects on GABA receptors
alcohol
How is buspirone (BuSpar) to treat anxiety different than benzodiazepines?
- NOT a benzodiazepine
- Does not depress the CNS
- Aciton is unknown, believed to interact with neurotransmitter receptors
- lag period 7 to 10 days, full therapeutic effect 3-4 weeks
- DOES NOT HAVE ADDICTION POTENTIAL
what are some nursing diagnoses we can apply for patients receiving antianxiety agents?
risk for injury related to seizures; panic anxiety; acute agitation from alcohol withdrawal; abrupt withdrawal from meds after long term use; effects of medication intoxication or overdose
What are some criteria that may be used to evaluate effectiveness of therapy with antidepressant medications?
- demonstrates reduction in anxiety
- is able to tolerate usual activities without excessive sedation
-exhibits no evidence of confusion - verbalizes possible consequences of abrupt withdrawal from medicaion
What was the “first” antidepressant drug and what was it originally used to treat?
monoamine oxidase inhibitor (MAOI) isoniazid
tuberculosis
MAOIs are associated with potentially deadly side effects in those who ate foods high in ______
tyramine; aged cheeses, red wine, raisins, salami
Indications for SSRI therapy includes
depression, bulimia, borderline personality disorder, obesity, smoking cessation
Despite the mechanisms of action antidepressants use is theoretical, what we do know is __________
these drugs ultimately work to increase the concentration of norepinephrine, serotonin, and/or dopamine
How are (TCA, tetracyclics, SSRIs, and SSRIs) antidepressants able to increase the concentration of neurotransmitters: norepinephrine, serotonin, dopamine?
these drugs BLOCK the reuptake of these neurotransmitters by neurons
How are MAO antidepressants able to increase the concentration of norepinephrine, serotonin, and dopamine?
when the enzyme monoamine oxidase (which is known to inactivate NE, S, D) is INHIBITED at various sites in the nervous system
What are some more nursing diagnoses for patients receiving therapy with antidepressants
- risk for suicide r/t depressed mood
- risk for injury r/t side effects of sedation
- social isolation r/t depressed mood
- risk for constipation
- insomnia r/t depressed mood and elevated anxiety
pg72
Some individuals taking SSRI or SNRIs complain of __________ dysfunction
Men may report ________ ejaculation or __________
and women may report loss of __________.
Why is this alarming?
sexual; abnormal; impotence; orgasm
patients may stops medications ABRUPTLY
what is priapism
Priapism is a disorder in which the penis maintains a prolonged, rigid erection in the absence of appropriate stimulation.
what is a hypertensive crisis?
a sudden, severe INCREASE in blood pressure
for many years, the drug of choice for bipolar mania was _____ ________
lithium carbonate
In recent years, several other medications have demonstrated effectiveness either alone or in combination with lithium most notably _______________
some anticonvulsant meds
what is neuroleptic malignant syndrome
Neuroleptic malignant syndrome (NMS) is a life-threatening neurologic emergency associated with the use of antipsychotic (neuroleptic) agents and characterized by a distinctive clinical syndrome of mental status change, rigidity, fever, and dysautonomia.
Bipolar dis is characterized by ______ of depression and ________ episodes
cycles; manic
How do manic episodes manifest?
grandiose thinking, rapid thoughts. hyperactivity, impulsive agitation
Many may describe living with bipolar as _________________
“riding a rollercoaster”
cycles of ups and downs
Lithium is a _____ present in mineral springs and added to relaxing spa baths
salt
Lithium is therapeutically classified as a
mood stabilizer
Although lithium is not a cure for _________ ________ it is often described as “like insulin for a diabetic”
bipolar disorder
**not everyone responds this way, lithium can be fatal