Bipolar Disorder and Mania Flashcards
severe cyclic episodes from mania to dpn
bipolar I
milder episodes of hypomania that alternate w. periods of severe dpn
bipolar II
psychotic sx - elevated, expressive, or irritable mood - can be present in
bipolar I
dsm for mania
elevated, expansive, or irritable mood x 1 week most of the day
PLUS
3 or more euphoric sx
OR
4 or more irritable sx
what does DIGFAST stand for
sx of mania:
distractibility
insomnia
grandiosity
flight of ideas
activity
speech
thoughtlessness
first line tx for bipolar
initial: lithium
AND
valporate
later: lamotrigine OR antidepressants
tx of mania may require
atypical antidpn
pharm for acute manic sx of bipolar
benzos → alprazolam, lorazepam
atypical antipsychotics
lithium interferes w. __ recycling
PIP → Gg protein
onset of action for lithium
10-21 days
s.e of lithium
hypothyroidism
polyuria/polydipsia
how does increased Na intake affect lithium
decreases lithium plasma levels
how does Na restriction affect lithium
increases lithium plasma levels
lithium has a narrow therapeutic index and minor toxicity can cause
tremor
GI upset
muscle weakness
hypothyroidism → wt gain
anti-ADH → polyuria/polydipsia
what 4 drugs can decrease renal clearance of lithium
diuretics
ACEI
NSAIDs
analgesics
effect of NSAIDs, diuretics, ACEI, analgesics on plasma lithium
increased
pathway that increases dopamine → positive sx
mesolimbic
pathway that decreases dopamine → negative sx
mesocortical
positive sx of dopamine
delusions
hallucinations
disordered thoughts
negative effects of dopamine
blunted affect → anhedonia
asociality → alogia
dopamine hypothesis of schizophrenia
overactivity in brain mesolimbic system → overactive dopaminergic pathways
virtually all antipsychotic drugs block __ receptors
dopamine D2
drugs that block D2 receptors are immediate, but onset of psychoses improvement can take
3-6 weeks
weak D2 blocker but extremely effective antipsychotic
clozapine
5HT2a receptors __ dopamine release,
activation of these receptors have __ effects
decrease
hallucinatory
mc psychotic d.o
schizophrenia
hallmark of schizophrenia positive sx of schizophrenia
acute episodes of marked disturbance of thinking
t/f: schizophrenia affects males and females equally
T!
but age of onset differs
positive sx of schizophrenia are caused by
overactivity of dopamine neurons → mesolimbic pathway
positive sx of schizophrenia
delusions
hallucinations
thought disorders
negative sx of schizophrenia are caused by
hypoactivity of dopamine
negative sx of schizophrenia
withdrawal from social contact
flattening of emotional response
decreased attention span
poor memory
negative sx are associated w. what type of schizophrenia
chronic
what drug is used to treat apathy and blunted affect in schizophrenia
clozapine
atypical antipsychotics to know
quetiapine → seroquel
aripiprazole → abilify
rsiperidone → risperdal
olanzapine → zyprexa
typical antipsychotics to know
haloperidol
chlorpromazine
typical antipsychotics (1st gen) have __ D2/5HT blocking ratio,
and therefore good efficacy for __ sx
high
positive
s.e related to good block of D2
extrapyramidal toxicity
high potency antipsychotic __
is associated w. high __
but less __
haloperidol
D2 s.e → extrapyramidal
ADR
low potency antipsychotic __
is associated w. less __,
but higher __
chlorpromazine
D2 s.e → extrapyramidal
ADRs → from M-H1-a1 block
typical antipsychotics have __ D2/5HT blocking ratio,
and __ D2 block,
and __ antipsychotic efficacy
high
good
good
atypical antipsychotics are effective for __ symptoms
negative
atypical antipsychotics have poor block of __,
__ block of 5HT2a,
and __ incidence of EPSE
D2
low
low
typical antipsychotic: chlorprozamine
D2/5HT ratio:
clinical potency:
EPS toxicity:
sedative action:
hypotensive action:
D2/5HT ratio: high
clinical potency: low
EPS toxicity: medium
sedative action: high
hypotensive action: high
typical antipsychotic: haloperidol
D2/5HT ratio:
clinical potency:
EPS toxicity:
sedative action:
hypotensive action:
D2/5HT ratio: very high
clinical potency: high
EPS toxicity: very high
sedative action: low
hypotensive action: very low
atypical antipsychotics:
D2/5HT ratio:
clinical potency:
EPS toxicity:
D2/5HT ratio: very low
clinical potency: very low
EPS toxicity: low
s.e of low potency typical antipsychotic (chlorpromazine)
muscarinic block → BBSLUDGE
alpha 1 block → orthostatic hypotn
H1 histamine block → sedation, wt gain, T2DM risk
s.e of high potency typical antipsychotic (haloperidol)
EPS →
dystonia
akathisia → can’t sit still
pseudoparkinsonism
tardive dyskinesia
tx for dystonia
anticholinergics → diphenhydramine/benztropine
tx for akathisia
reduce dose
change drug
bb
anticholinergic
benzo
tx for pseudoparkinsonism
anticholinergics
tx for tardive dyskinesia
rarely effective but try:
clozapine
valbenazine → crazy expensive
really bad s.e of clozapine
agranulocytosis
CBC required prior to dosing
common s.e of atypical antipsychotics (2)
wt gain
T2DM
other adverse reactions of antipsychotics
altered thermoregulation
galactorrhea
photosensitivity
lowered sz threshold
neuroleptic malignant syndrome
most potent antipsychotic
haloperidol
2 considerations w. antipsychotic absorption
most are incompletely absorbed
significant first pass effect
how can dose variation of antipsychotics be reduced
liquid formulations
3 routes of admin for antipsychotics
oral
IM solution
IM depot suspension
3 distribution properties of antipsychotics
extensively protein bound
high lipid solubility
cross placenta
3 metabolism/excretion properties of antipsychotics
almost completely metabolized
oxidized by CYP450
excreted in breast milk
when are atypical agents preferred
negative sx
cognition deficits
decreased risk for EPSE
antipsychotic for refractory sx
clozapine
wt gain and metabolic effects are highest w.
olanzapine
clozapine
quetiapine
wt gain and metabolic effects are lowest w.
aripiprazole
lurasidone
EPS effects are highest w.
risperidone
EPS effects are lowest w.
quetiapine
iloperidone
sedation is minimum w.
aripiprazole
risperidone
sedation is highest w.
quetiapine
olanzapine
best for insomnia/agitation
QT prolongation:
highest risk:
lowest risk:
highest: ziprasidone
lowest: aripiprazole