Psychiatry Flashcards
pt thinks he has special powers; God given missions
Grandiose Delusion
irrational belief that can’t be changed by proof or rational arguments
Delusion
misinterpret stimulus that’s actually there (eg. think tree branch is a person)
Illusion
sensory perception in absence of external stimulus
Hallucination
mood sxs present for significant portion of the illness
BUT delusions/hallucinations occur for ≥ 2 wks in absence of mood sxs (eg. depressive or manic episode)
mood disorder ONLY occurs during psychosis
Mood sxs + psychosis———————Mood sxs + psychosis
Psychosis ONLY
Schizoaffective Disorder
Most effective tx for negative sxs (2)
- atypical antipsychotics
- social skills training
answers diverge from question asked but eventually return to original topic
circumstantiality
answers diverge from question asked and DO NOT return to original topic
tangentiality
no clear sequence to the thoughts presented
loose association
words strung together incoherently
word salad
pt makes up new words
neologism
drugs that cause psychosis sxs
hallucinogens (eg. PCP, LSD) stimulants (eg. cocaine, amphetamines) w/d from alcohol, benzo, barbiturates glucocorticoids anabolic steroids
neuroimaging findings in Schizophrenia
enlargement of 3rd and lateral ventricles
cortical thinning
one person’s delusion transferred to another person
Folie a Deux (Shared Psychotic Disorder)
TX: separate the 2 pts and assess degree of impairment in each
Neurotransmitters responsible for positive vs negative sxs of schizophrenia
Positive = Dopamine Negative = Muscarinic receptors
Positive Sx of Schizophrenia
Delusions (BIZARRE)
Hallucinations
Disorganized thoughts/speech
Negative Sx of Schizophrenia
Apathy Social withdrawal Flattened affect Anhedonia Poverty of thought
+ or - sxs present for 6 months
impact on social/occupational functioning
Schizophrenia
+ or - sxs present for >1 month but < 6 months
impact on social/occupational functioning
Schizophreniform Disorder
+ or - sxs present for <1 month
impact on social/occupational functioning
sxs return to baseline after 1 month
Brief Psychotic Disorder
sxs for many years (has to be at least ≥ 1 month)
no impairment in level of functioning
delusions are NONBIZARRE
Delusional Disorder
Features of Schizophrenia that suggest POOR Prognosis
male sex early age on onset gradual onset no precipitating factors negative sxs poor premorbid functioning (MOST IMPT) FHX of schizophrenia poor support system single, divorced, or widowed status disorganized or deficit subtype
Management of Schizophrenia
- pt has bizarre or paranoid sxs –> hospitalize pt
- pt agitated –> give benzos
- start antipsychotics (give for 6 months)
- -> long term antipsychotics only necessary for h/o repetitive episodes
- start psychotherapy
Indications for Antipsychotic Use (5)
- schizophrenia
- depression w/ psychotic features
- mania in bipolar disorder
- sedation when benzos CI
- movement disorders (eg. Huntington’s Disease and Tourrette syndrome)
what two medications should be avoided in 1st psychotic episode and why?
Olanzapine
Clozapine
They cause w. gain and metabolic adverse effects
antipsychotics increase the risk of mortality in what disease?
dementia
First choice medication for tx of schizophrenia when sedation is problem
Risperidone
which receptors are blocked by Typical Antipsychotics and what are the 2 categories of Typical Antipsychotics?
Block D1 and D2 receptors
Low potency and High potency
Examples of Low Potency, Typical Antipsychotics
Chlorpromazine
Thioridazine
Advantages and Disadvantages of Low Potency, Typical Antipsychotics
Advantages:
- Less EPS sxs
Disadvantages:
- Anticholinergic SEs (eg. dry mouth, urinary retention)
- alpha 1 blockade (orthostatic BP)
- anti-histamine SEs (sedating)
SEs of Chlorpromazine and Thioridazine
Chlorpromazine –> deposits in Cornea
Thioridazine –> deposits in retina, prolonged QT and arrhythmias (get EKG before starting MDX)
Examples of High Potency, Typical Antipsychotics
Haloperidol Fluphenazine Trifluoperazine Loxapine Thiothixene
Advantages and Disadvantages of High Potency, Typical Antipsychotics
Advantages:
- FEWER Anticholinergic SEs (eg. dry mouth, urinary retention)
- FEWER alpha 1 blockade (orthostatic BP)
- FEWER anti-histamine SEs (sedating)
- can take IM and some in depot injection form
Disadvantages:
- EPS sxs
examples of long acting injectable antipsychotics
Haloperidol
Fluphenazine
Both are high potency, typical antipsychotics
These are good for ppl who are non-compliant
SE of Fluphenazine
Hypothermia
- disrupts thermoregulation and body’s shivering mechanism
which receptors are blocked by Atypical Antipsychotics?
D2 and serotonin receptors
Examples of Atypical Antipsychotics
Aripiprazole Olanzapine Quetiapine Risperidone Clozapine Ziprasidone
NOTE: Atypical antipsychotics are used to augment antidepressants in pts w/ tx-resistant depression
Advantages and Disadvantages of Atypical Antipsychotics
Advantages:
- best choice for initial therapy
- best effect on negative sxs
- FEWER anticholinergic SEs
- FEWER EPS sxs
Disadvantages:
- W. gain (increased risk for DM and metabolic syndrome - so monitor glucose and lipids)
- -> highest risk w/ olanzapine
- -> second highest risk w/ clozapine
- -> least risk w/ aripiprazole or ziprasidone
SE of risperidone
hyperprolactinemia
–> galactorrhea, amenorrhea, impotence, decreased libido
Indications for Clozapine use
Refractory cases of schizophrenia
–> if pt responded to other antipsychotics in part, then not candidate for clozapine
Schizo w/ suicidality
SEs of clozapine
agranulocytosis
- -> monitor w/ CBC before therapy and weekly during therapy
w. gain - -> monitor glucose and lipids
List Extrapyramidal SEs
1) Acute dystonia (w/in days)
- -> sustained muscle contractions (eg. torticollis)
2) Parkinsonism (w/in wks)
- -> bradykinesia, akinesia, rigidity, tremors, mask like facies
3) Akathisia (w/in wks - mo)
- -> restlessness, compulsion to move
4) Tardive dyskinesia (w/in mo - yrs)
- -> choreoathetosis (writhing movements) of tongue, face, neck, trunk, limbs
- -> lip smacking
- -> irreversible
- -> NOTE: chronic use of DA antagonists (eg. metoclopramide) can result in tardive dyskinesia
Tx of Extrapyramidal SEs
1) Acute dystonia
- -> decrease dose
- -> benztropine (anticholinergic) or diphenhydramine
2) Parkinsonism
- -> decrease dose
- -> benztropine (anticholinergic) or amantadine
3) Akathisia
- -> decrease dose
- -> B-blockers or benzo
4) Tardive dyskinesia
- -> d/c older antipsychotic
- -> start newer antipsychotic (eg. clozapine)
Dopamine Pathways (3)
Mesolimbic Pathway (has to do w/ schizo) Nigrostriatal Pathway (has to do w/ Parkinson) Tuberoinfundibular Pathway (has to do w/ prolactin)
Effects of ↑ DA and ↓ DA in Mesolimbic Pathway
↑ DA: delusions and hallucinations
↓ DA: no (+) sxs of schizo
Effects of ↑ DA and ↓ DA in Nigrostriatal Pathway
↑ DA: chorea/tics
↓ DA: Parkinson sxs + EPS sxs
Effects of ↑ DA and ↓ DA in Tuberoinfundibular Pathway
↑ DA: inhibits prolactin release
↓ DA: releases prolactin = hyperprolactinemia sxs
Medical illnesses to r/o before dx of schizo
- hypo/hyperthyroidism (get TSH)
- electrolyte abn (get BMP)
- HIV (get serology)
- syphilis (get VDRL)
- drug intoxication (get drug screen)
- temporal lobe epilepsy
medical causes of anxiety
hyperthyroidism pheochromocytoma excess cortisol heart failure arrhythmias asthma COPD
drug causes of anxiety
corticosteroids caffeine amphetamines cocaine withdrawal from alcohol and sedatives
normal reaction after change in person’s life (eg. divorce, breaking up w/ gf, migration)
sxs occur w/in 3 months of stressor and go away w/in 6 months of removing the stressor
Adjustment Disorder
TX: counseling
brief, some UNEXPECTED attacks of intense anxiety w/ autonomic sxs (eg. tachycardia, hyperventilation, dizziness, sweating)
episodes occur regularly
have obvious PRECIPITANT
pt worries about having more attacks and changes behavior to prevent them
Panic Disorder
Neuroimaging findings of Panic Disorder
Decreased volume of amygdala
Diseases associated w/ panic disorder
Agoraphobia Depression Bipolar Disorder Substance abuse Increased risk of suicide ideations/attempts
Tx for Panic Disorder
CBT
Relaxation training and desensitization (more useful if have agoraphobia sxs also)
SSRIs
PANIC ATTACK: Benzos
Tx of Social Anxiety Disorder
Exposure therapy
ACUTE ATTACK: Benzo
PERFORMANCE ANXIETY: B-blockers (atenolol or propranolol)
excessive poorly controlled anxiety (about EVERYTHING) that occurs daily
≥ 6 months
no precipitating factor
Generalized Anxiety Disorder
Tx for Generalized Anxiety Disorder
psychotherapy (relaxation training, biofeedback)
SSRIs/ SNRIs
buspirone (serotonin receptor partial agonist)
benzo
recurrent obsessions or compulsions
pt KNOWS behavior is unreasonable
Obsessive Compulsive Disorder
NOTE: To dx OCD, need EITHER obsessions or compulsions; don’t need both
What infection can give you acute sxs of OCD?
recent grp. A strep infxn (seen in kids)
TX: SSRIs
What disorders are common in OCD pts?
Depression
Substance use
NOTE: Pts w/ Tourette syndrome often have OCD
Tx for Obsessive Compulsive Disorder
Behavioral psychotherapy (exposure and response prevention therapy)
SSRIs
–> need high doses, prolonged trials and gradual up titration
Clomipramine (TCA)
–> if SSRIs don’t work
–> many SEs (anticholinergic, ↓ BP, cardiac conduction delay)
general guidelines about benzo use
don’t change doses abruptly –> can get SEIZURES
use lowest dose possible in elderly
advice against using machinery or driving
Shortest to Longest Half Life of Benzos
Shortest to Longest Half Life:
Alprazolam
Lorazepam (can be used in IM form; esp helpful for emergency situations)
Diazepam
Benzos safe to use in Liver disease
“LOT”
Lorazepam
Oxazepam
Temazepam
Tx of ACUTE overdose of benzo
flumazenil
sxs last < 1 month
severe anxiety sxs that follow life-threatening event:
–> re-experience traumatic event
–> avoid stimuli associated w/ event
–> increased arousal (sleep disturbances, hyper-vigilance, emotional detachment, concentration difficulties, irritability, amnesia)
Acute Stress Disorder
sxs last > 1 month
severe anxiety sxs that follow life-threatening event:
–> re-experience traumatic event
–> avoid stimuli associated w/ event
–> increased arousal (sleep disturbances, hyper-vigilance, emotional detachment, concentration difficulties, irritability, amnesia)
Post-traumatic Stress Disorder (PTSD)
Tx for Acute Stress Disorder + PTSD
ACUTE ANXIETY: Benzo
Trauma-focused brief CBT
LONG TERM: SSRIs
NIGHTMARES: Prazosin (alpha blocker)
Most effective therapy to PREVENT PTSD = group counseling
Neuroimaging findings for PTSD
decreased volume of hippocampus
Survivors of Sexual Assault are at Increased Risk for what Psych Problems?
PTSD
Depression
Suicide
Which neurotransmitters are decreased in Major Depression Syndrome?
NE
Serotonin
Dopamine
depressed mood or anhedonia lasting ≥ 2 weeks
“SIGECAPS”
Major Depressive Disorder
NOTE: Adolescents get irritable mood instead of depressed mood
Medical causes of Depression
Hypothyroidism HyperPTH HIV Cancer (eg. CNS neoplasms) Stroke Parkinson's disease Alcohol use Cocaine w/d
MDX that cause Depression
Corticosteroids B-blockers antipsychotics (esp in old ppl) reserpine (antipsychotic; anti-HTN) anti-histamines benzo metoclopramide/prochlorperozine IFN-alpha
Tx of Major Depressive Disorder
If pt has ACTIVE suicidal ideations –> admit to hospital
If pt agitated –> give benzos
Interpersonal psychotherapy SSRIs (FIRST LINE) --> take 4-6 wks to work SNRIs Buproprion ECT
Tx for single episode of depression
Antidepressant for 6 months after pt responses (don’t change dose in this time)
Tx for multiple episodes of depression
maintenance therapy req’d for long time (1-3 yrs) OR for life (if episodes very severe or ≥ 3 episodes)
Indications for Electroconvulsive Therapy (ECT)
SE of ECT
pt acutely suicidal
MDD not responsive to MDXs
for pts worried about side effects from MDXs
pts w/ psychotic depression
depression w/ malnutrition or catatonic stupor (old pt that doesn’t eat or drink)
Bipolar D
Schizophrenia
safe in preg pts (for depression or mania)
SE: retrograde amnesia
What about depressed pts w/ life expectancy of only 2-4 wks. What to give them?
Methylphenidate (works much faster than antidepressants)
First line SSRI in kids or teens w/ depression?
Fluoxetine
Major depression is an independent risk factor for increased morbidity and mortality in which disease?
Cardiovascular disease
pts w/ late onset depression (after age 65) are at increased risk for developing what diseases when compared to those that present earlier?
Alzheimer’s Disease
Vascular dementia
old depressed pt presents w/ memory loss
pt overly concerned abt memory loss
pt seeks help themselves
can mimic Alzheimer’s Disease
CT head normal
Pseudodementia
Can detect real depression via dexamethasone suppression test (test will be abn in 50% pts w/ depression)
low level depression sxs that are present on most days for at least 2 years
Dysthmic Disorder (Persistent Depressive Disorder)
TX:
long term individual, insight-oriented psychotherapy
SSRIs (if psychotherapy fails)
depressive sxs in winter months
Seasonal Affective Disorder
TX: phototherapy or sleep deprivation
mood reactivity increased appetite/weight hypersomnia leaden paralysis (arms and legs feel heavy) hypersensitive to rejection
MDD w/ Atypical Features
TX: respond well to MAOIs and SSRIs