mental health final Flashcards
two subdivisions of autonomic nervous system
sympathetic (fight or flight) and parasympathetic (rest and digest)
Dopamine responsible for:
movement and depression. pleasure center of brain
serotonin responsible for:
elevating mood
GABA:
inhibitory and excitatory
epinephrine
released with sympathetic nervous system is activated
glutamate
excitatory NT in brain, traffic cop
frontal lobe responsible for:
cognition, voluntary movement, executive functioning (lists, checkbook balance, etc)
thalamus responsible for:
relays motor and sensory activity
limbic system responsible for:
emotions and memory
extrapyramidal system (EPS) responsible for:
regulating involuntary movement (affected in parkinson’s)
neurotransmitter is:
chemical messenger that controls neuron function. selectively causes excitation or inhibition of action potentials
4 major neurotransmitters:
GABA (always inhibitory).
Monoamines: epi, norepi, dopamine, serotonin.
Acetylcholine: inhibitory in heart, excitatory in muscles.
Glutamate: excitatory, traffic cop.
Steps in NT synaptic transmission (five)
1) NT synthesized
2) NT stored in synaptic vesicles (presynaptic cleft)
3) synaptic vesicle releases NT
4) NT binds to receptor that will accept it
5) termination of NT after job is done
Autonomic nervous system maintains internal ____
balance/homeostasis
parasympathetic:
rest and digest, acetylcholine, cholinergic, muscarinic, parasympathomimetic, sympatholytic, alpha blocker, beta blocker, relaxation
sympathetic:
fight or flight, adrenergic, anticholinergic, sympathomimetic, parasympatholytic, alpha 1 and 2 receptors, beta 1 and 2 receptors, stimulation
what can cause exaggerated effects of NT?
too much NT produced or too much released, oversensitivity of receptor, inadequate removal
what can cause inadequate effects of NT?
deficient synthesis, too little released, insensitive receptor site
What is PSYCHOTROPIC?
Med that enters CNS
pharmacotherapy has effects observed on ___, ___, and ___
thought, mood, behavior
____ dosage if pt has damage to kidney or liver to avoid toxicity
decreased dosage
excretion happens in:
liver and kidney, sometimes lungs and skin
how many half lives to reach steady state and for elimination of most of the drug?
4-5 half lives
Anti anxiety agents, types of drugs:
SSRI, SNRI, Benzodiazepines, Hydroxyzine, Beta blocker, Anticonvulsants
SSRI used for
depression, anti anxiety
SNRI used for
depression, anti anxiety
SSRI keeps more ___ at receptor site
serotonin
SNRI keeps more ___ at receptor site
serotonin and norepinephrine
Benzodiazepines used for
anti anxiety
Benzodiazepines do what:
increases GABA in the brain
Hydroxyzine does what:
increases serotonin and is an antihistamine - relaxes patient
Beta blocker does what: (propranolol)
stops sympathetic nervous system
Gabapentin does what (anticonvulsant):
increase GABA NT in brain
What are antipsychotics used for?
schizophrenia, delusional disorders, bipolar disorders, depressive psychoses, drug induced psychoses
Two groups of antipsychotics and how they work:
FGA (conventional): block receptors for dopamine in the CNS.
SGA (atypical): produce moderate blockage of dopamine receptors; stronger blockage for serotonin.
Risk for FGAs and SGAs:
FGAs: can cause serious EPS
SGAs: higher risk of metabolic effects
Schizophrenia positive symptoms:
- hallucinations (altered sense of perception, not pleasant) - one of the senses affected.
- delusions
- disordered thinking
- combativeness
- agitation
- paranoia
Schizophrenia negative symptoms:
- social withdrawal
- emotional withdrawal
- lack of motivation
- poverty of speech
- blunted affect
- poor insight
- poor judgement
- poor self care
Which schizophrenia symptoms (+/-) respond to antipsychotics (FGA/SGA)?
Both + and - respond to FGA/SGA. If patient at risk for metabolic disorder, will not go on SGA.
FGA classified by?
potency (high/low)
FGA low potency drug:
chlorpromazine (Thorazine)
FGA high potency drug:
haloperidol (Haldol)
FGA mechanism of action:
block a variety of receptors within and outside the CNS, block receptors for Ach, histamine, norepi.
FGA therapeutic uses:
Schizophrenia, bipolar, prevent emesis
Adverse effects of FGA:
(in order): Acute dystonia Parkinsonianism Akathisia Tardive Dyskinesia
CAN CAUSE TORSADES DE POINTES
Other: Anticholinergic side effects, orthostatic HoTN, Neuroleptic malignant syndrome, sedation, seizures, sexual dysfunction, dermatologic effects, neuro endocrine effects.
Acute dystonia s/s and treatment:
Severe spasm of muscles of back, face, tongue, upward deviation of eyes. can end up with severe laryngospasms.
Occurs within hours/days of first FGA dose.
Medical emergency.
Treatment: ANTICHOLINERGIC MEDICATION
Parkinsonianism s/s and treatment:
Drooling, tremors, rigidity, mask like expression.
Occurs within first month of FGA.
Treatment: ANTICHOLINERGIC MEDICATION. Do not give med for Parkinson’s - can exacerbate. Will resolve on it’s own in a couple months.
Akathisia s/s:
Pacing, squirming, moving legs, cannot sit still.
Occurs within two months of FGAs.
Tardive Dyskinesia s/s:
Involuntary movement of face, mouth, tongue (slow worm-like movement). Hard time eating, malnourished, involuntary movements of limbs and torso.
FREQUENTLY IRREVERSIBLE.
Occurs on long-term FGAs.
Anticholinergic side effects:
increased HR, constipation, urinary retention, orthostatic hypotension
Neuroleptic malignant syndrome:
Rare, serious. Fatal without treatment.
Sweating, rigidity, sudden high fever >104, autonomic instability (HR and BP all over the place, unstable).
FGA Toxicity:
Typically very safe, OD is rare.
OD causes HoTN, CNS depression, EPS.
Treatment: IV Fluids, alpha-adrenergic agonist, gastric lavage. Emetics not effective.
Haloperidol (HALDOL) (FGA high potency)
PO or IM.
Hepatic metabolism. First pass effect. Renal excretion.
Used for schizophrenia and acute psychosis, preferred for Tourette’s.
A/EL EPS, gynecomastia, menses irregularities, QT prolongation, cardiac dysrhythmias.
Why would FGA be given over SGA?
Increased risk of metabolic disorders: weight fain, diabetes, dyslipidemia
SGA Drug:
Clozapine
What family drug does Clozapine fall under?
SGA
Clozapine used for:
Schizophrenia, levodopa induced psychosis
What is the risk of using Clozapine? What are the interventions for this?
Risk of agranulocytosis. Provider needs to try minimum 4 other meds before clozapine will be ordered.
WBC checked daily when starting x1 week.
Weekly WBC x6 months.
If WBC < 3k, interrupt med and will start again when WBC > 3k.
If WBC falls < 2k, never on med again.
Clozapine mechanism of action:
Blocks dopamine and serotonin
Clozapine pharmacokinetics:
PO, rapid absorption, highly protein bound, hepatic metabolism, renal and fecal excretion.
What is Risperidone (Resperdal)?
Depot preparation SGA. Long term formulation for schizophrenia.
Long acting IM injection q3 weeks-1 month.
Types of antidepressants:
SSRI, SNRI, Tricyclic, MAOI, Atypical
Antidepressants used for:
Used to relieve s/s of depression, can help anxiety.
Depression s/s:
Depressed mood, loss of pleasure/interest (anhedonia), insomnia/hypersomnia, anorexia or hyperphasia, mental slowing, LOC, death/suicidal thoughts/behaviors.
Diagnosis of depression: s/s must be present _____
nearly every day for at least 2 weeks.
Pathophysiology of depression:
Genetics, childhood difficulties, low self esteem.
Monoamine hypothesis of depression: caused by functional insufficiency of monoamine NT.
Nature vs nurture.
What is the main concern after a patient begins an antidepressant?
Increased risk of suicidal tendencies. It takes 4-6 weeks for antidepressants to start to work. The medication gives energy to kill self and motivation.
Observe closely for suicidality, worsening mood, behavior change.
SSRI drugs:
Fluoxetine, Sertraline, Citalopram
SSRI uses:
primarily for major depression.
Other: OCD, bulimia nervosa, PMS dysphoric disorder, PTSD, anxiety.
SSRI adverse effects:
Serotonin syndrome w/in 2-72 hours.
Withdrawal s/s: dizziness, headache, nausea, anxiety
May cause neonatal withdrawal
teratogenesis, EPS, bruxism, bleeding disorder, sexual dysfunction, weight gain (not with fluoxetine)
Serotonin syndrome:
altered mental status, agitation, disorientation, hallucinations, hyperreflexia, diaphoresis, tremors, fever, death has occured
SSRI drug interactions:
MAOIs, warfarin, TCAs, lithium
SNRI drug:
Venlaxafine
SNRI used for:
Major depression, generalized anxiety disorder
SNRI side effects:
nausea, headache, anorexia, nervous, sweating, somnolence, insomnia, weight loss, anorexia, diastolic HTN, sexual dysfunction
TCA drugs:
amitriptyline
TCA used for:
Major depression, bipolar disorders
other: neuropathic pain, chronic insomnia (Admin in morning), ADD, panic disorder, OCD
TCA most dangerous effect:
CARDIAC TOXICITY
TCA most common adverse effects:
sedation, orthostatic HoTN, anticholinergic effects
TCA Side effects:
Yawngasm, HoTN, seizures
TCA toxicity manifestations:
Anticholinergic and cardiotoxic actions:
Dysrhythmias, tachycardia, complete AV block, VTach, VFib
What does “-Ase” mean?
Enzyme, breaks down chemicals
What does MAOI do?
Monoamine oxidase inhibitor - prevents monoamine oxydase from breaking down Norepi, serotonin, and dopamine.
What is MAOI used for?
last choice antidepressant
What food is restricted while using MAOI?
any foods rich in Tyramine *** can trigger hypertensive crisis
MAOI Med:
Selegeline
MAOI used for:
depression, bulimia nervosa, OCD, panic attacks
MAOI Adverse effects:
CNS stimulation, orthostatic HoTN, hypertensive crisis from tyramine ingestion
Foods rich in tyramine:
bologna, pepperoni, salami, cheeses, beer, wine, soy sauce, chocolate, yogurt
How else can Selegeline (MAOI) be given?
PO or Transdermal
Atypical antidepressant med:
Buproprion (wellbutrin)
Atypical antidepressant used for:
Stimulant and suppresses appetite, will increase libido
usually taken with SSRI
Main drugs given for Bipolar Disorder:
Lithium, Valproic Acid
How does lithium work?
Control episodes of acute mania, helps prevent return of mania.
Short half life - 2-3x daily
Can take several weeks to work
Patient will stay on lithium even if mania goes away
Lithium interactions:
diuretics, NSAIDs, anticholinergic drugs
Lithium therapeutic range:
0.6-0.9 preferred
What is trazodone given for?
Help sleep, can cause hangover effect. Smaller doses are better.
Who should not take antihistamines?
Children or >65y/o