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123 Cards in this Set
- Front
- Back
schizo- lifetime incidence
onset (age) gender |
lifetime incidence- 1%
onset- late adolescence/early adulthood- earlier in males new studies show males > females |
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etiology of schizo (3)
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Genetic Susceptibility (multiple alleles)- risk increased if have first degree relative with it
environmental (infection in fetus, hypoxia, leads to abnormal neuron migration), maybe SCZ has something to do with dendrite pruning since this usually occurs by midadolescence |
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schizo course of illness (most deterioration when?) and tx efficacy vs. timing (2)
maintenance therapy efficacy |
Most deterioration in psychosocial functioning
occurs within the first 5 years- Early treatment predicts better long-term outcomes Majority of patients experience 1+ relapse: Antipsychotic maintenance therapy significantly reduces the risk of relapse at 1 yr |
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ideal schizo case
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Initial psychotic episode is quickly detected and treated and further
illness is prevented by prophylactic treatment |
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chronic schizo relapsing case
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Chronic relapsing condition with each psychotic
exposure decreasing global function |
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Schizo and suicide correlation (% of pt that do it, cause of death)
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~ 30%-40% of people with schizophrenia attempt
suicide at some point in their lifetime Suicide is the most common cause of premature death among patients with schizophrenia |
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6 risk factors for suicide in SCZ patients
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Symptoms of depression
Hallucinations (voices telling patient to commit suicide) Substance abuse Being unmarried Not having a job Recent discharge from the hospital |
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definition of psychosis (3)
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A severe mental disturbance that involves a
profound misinterpretation of perceptions or loss of contact with reality Interferes with the ability to interact appropriately with others or with the environment Psychotic features/symptoms are present in various disorders (including mood disorders) |
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definition of psychotic disorder
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Include psychotic symptoms as a prominent
aspect of their presentation |
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clinical presentation of schizo: 3 types of sx
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Negative- taking away something
Positive- adding somthing Cognitive- inability to make decision, decrease mental functionality |
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positive sx =
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psychotic sx
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positive sx consist of (4)
4 types of delusions |
Hallucinations
Delusions- fixed false beliefs about things e.g. Persecutory (paranoia), Grandiose, Referential (books/tv sending messages to them), Bizarre (weird **** that can't be true) Disorganized speech Grossly disorganized or catatonic behavior |
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Negative symptoms (5)
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Affective flattening- impaired outward display of emotions
Alogia (Poverty of Speech)- Decreased speech fluency Avolition- Lack of motivation or “drive” Anhedonia- Loss of interest or pleasure Asociality- lacking the capacity for social interaction |
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6 cognitive symptoms of schizo
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Poor concentration
Poor abstraction (can't see deeper meaning in things) Memory disturbances Inability to plan Impaired decision making Difficulty executing tasks |
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DSM-IV dx criteria for schizo (sx and durations) (3 portions/criteria)
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Two or more of the following symptoms, each
persisting for significant portion of at least a 1- month period (unless treated): Delusions Hallucinations Disorganized speech Grossly disorganized or catatonic behavior Negative symptoms Social/occupational dysfunction: For a significant portion of the time since onset of the disorder, one or more major areas of functioning such as work, interpersonal relations, or self-care are significantly below the level prior to onset Continuous signs of the disorder for at least 6 months Must include 1+ month of acute symptoms (unless successfully treated) and may include prodromal or residual periods |
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DSM IV: Schizoaffective disorder (3)
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Major Depressive Episode, Manic Episode, or
Mixed Episode concurrent with acute symptoms of Schizophrenia During same period of illness, there have been delusions or hallucinations 2+ weeks in absence of prominent mood symptoms (euthymic)- basically must be 2+ weeks where patient has psychotic sx but no mood disorder Mood episode symptoms present for a "substantial" portion of the illness duration |
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CNS diseases to r/o to dx schizo (6)
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Huntington’s Disease
Multiple Sclerosis Epilepsy Migraines CNS infections Deafness |
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metabolic disorders to r/o for schizo (3)
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Hypoxia
Hypercarbia Hypoglycemia |
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endocrine disorders that can cause psychotic disorders (3)
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Hyper/Hypothyroidism
Hyper/Hypoparathyroidism Cushing’s syndrome Addison’s disease |
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3 misc. disorders that can cause psychotic sx (3)
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Fluid/electrolyte
imbalances Hepatic or renal disease Systemic lupus erythematosis |
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substances associated with psychotic sx (9)
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Alcohol
Amphetamines THC Cocaine PCP LSD Inhalants Opioids Sedative/Hypnotics |
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substances that cause psychosis with withdrawal (2)
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Alcohol
Sedative/Hypnotics |
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4 DA pathways
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mesolimbic
mesocortical nigrostriatal tuberoinfundibular |
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4 DA pathways and where they go/what they do
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mesolimbic pathway- brain stem to limbic
mesocortical- brain stem to cortex nigrostriatal- sub nigra to striatum (motor- EPS sx) Tuberoinfundibular- hypothalamus to pituitary- inhibits prolactin release |
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Dopamine hypothesis (2)
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excess of DA activity in mesolimbic: positive sx
deficiency of DA in mesocortical: negative sx/cognitive sx |
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DA antagonism: tx efficacy and cause of adverse effects (4)
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DA inhibition in mesolimbic is good- but if we block too much DA and it affects other areas in brain- e.g. EPS in nigrostriatal, hyperprolactinemia (tuberoinfundibular)
Minimal improvement of negative sx in mesocortical |
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Ideal Antipsychotic for schizo properties (3)
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Decrease DA activity in the mesolimbic
pathway to treat positive symptoms Increase DA activity in the mesocortical pathway to treat negative symptoms Maintain adequate DA activity in the nigrostriatal and tuberoinfundibular pathways to minimize side effects |
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Antipsychotic classes
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first gen antipsychs
second gen antipsychs |
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first gen antipsychs- how they work
and what types of drug (3) |
primarily work by blocking D2 receptor
are conventional agents, neuroleptics or typical antipsychotics |
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second gen antipsychs- type of drug
MoA |
Atypical antipsychotics
Dopamine and serotonin blockade (less EPS sx...not sure why. i think serotonin block counters it). IDK this paper says that it's because the binding to D2 receptors is more transient/not as hard as dopamine |
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comparison of antipsychotic pharmacology
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chart - did not enter
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First gen antipsychotics- 2 categories
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phenothiazines (-zines)
non-phenothiazines |
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phenothiazines (5)
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Chlorpromazine (Thorazine®)
Thioridazine (Mellaril®) Perphenazine (Trilafon®) Trifluoperazine (Stelazine®) Fluphenazine (Prolixin®) |
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non-phenothiazines (5)
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Thiothixene (Navane®)
Haloperidol (Haldol®) Loxapine (Loxitane®) Molindone (Moban®) Pimozide (Orap®) – primarily for Tourette syndrome |
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First gen antipsychotic potency: high potency drugs properties (2)
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More potent D2 antagonism (more EPS)
Less anticholinergic, alpha-antagonism, sedation |
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examples of high potency antipsychotics (5)
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Haloperidol, fluphenazine, thiothixene,
trifluoperazine, pimozide |
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Moderate Potency FG antipsychotic property
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Moderate D2 antagonism as well as receptor selectivity- less...AE? (litsen again)
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relative potency- highest (4)
mod (3) least (2) |
least potent- chlorpromazine, thioridazine (phenothiazines)
moderate- Perphenazine, loxapine, molindone potent-this was on a diff slide |
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FGA oral dosing/max dose
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what to take away: low potency agent like (chlorpromazine- you need like hundreds of mg to get an effect)
know the relative...like..."ranges". in the tens or hundreds won't ask "is 30 mg in range for X drug |
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Haloperidol max dose and usual dosage range
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100 mg is MAX- people used to use these high doses regularly
nowadays very rare to use more than 20 mg of haloperidol due to dose related risk of EPS (range is 2-20) |
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Second gen antipsychotics (10)
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Clozapine
Risperidone Olanzapine Quetiapine Ziprasidone ripiprazole (abilify) paliperidone iloperidone asenapine lurasidone |
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D2 receptor occupancy and EPS/prolectin elevation
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no subject with D2 occupancy below 78% showed any EPS
72% for prolactin |
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What haloperidol D2 receptor study told us
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high potency typical antipsychotic
response is possible (but not probable) without EPS or prolactin elevation with appropriate D2 occupancy, however therapeutic window is narrow and variable |
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Functional interactions b/t 5HT and DA
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5-HT disinhibition of DA normally- but if you block this then DA can release normally in nigrostriatum
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D2/5HT2 occupancy of risperidone (and other second gens)
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...looks like it had almost 100% binding of 5HT2A receptors
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Exception to 5HT2/D2 effects in second gen antipsychotics (2)
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Clozapine- advantage- inability to occupy > 70% of D2 binding profile (saturation even at higher doses) - so not much EPS
Quetiapine is similar |
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missed a few slides due to computer dying
time course of response to antipsychotics (4 steps) |
1-2 weeks- decreased aggression/hostility/normal sleep/appetite
2-3 weeks- improve socialization, mood 2-6 weeks- improvement on psychotic sx "though disorders" residual sx - fixed delusions or hallucinations |
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Reasons for nonadherence to antipsychs (5)
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side effects (highest)
didn't like it thought they didn't need it when they were doing well didn't work forgot to take |
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Clinical consequences of D2 blockade (2)
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hyperprolactinemia
drug induced movement disorders |
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hyperprolactinemia consequences (6)
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Amenorrhea
Dysmenorrhea Gynecomastia Lactation Sexual dysfunction Osteoporosis? |
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hyperprolactinemia sx more common with what drugs (3)
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increased risk with FGAs risperidone and paliperidone
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drug induced mvmt (2 types and define them, kind of)
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- Extrapyramidal Symptoms (EPS) includes...
Dystonia Akathisia Pseudoparkinsonism -Tardive Dyskinesia (TD) |
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Dystonia characterized by... (6)
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sustained muscle contractions
Torticollis Protrusion or twisting of the tongue Trismus Blepharospasm Oculogyric crisis- eyes get rolled up into back of head Laryngospasm |
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acute dystonia sx onset
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Generally occurs within hours to days of
starting antipsychotic or increasing dose |
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risk factors for dystonia (4)
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Young Patients
Males (maybe because we tend to give young muscular...male patients higher doses) High Potency FGAs Previous Dystonic Reaction |
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tx for dystonia
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preferred is anticholinergics (benadryl or benztropine)- due to recipricol reactions between Ach and DA. if ineffective or not tolerated can use benzos
Ach suppresses mvmt so if you block it, you get opposite effect. |
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missed slides up until tx of induced akathisia
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--
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tx of akathisia (2 things to do to current regiment, 3 meds to add)
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Lower the antipsychotic dose
Switch to an SGA Add medication for akathisia- beta blocker (propranolol, nadolol, metoprolol) OR benzo but avoid if substance abuse ( i think beta blockers better). Anticholinergic not effective |
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Pseudoparkinsonism (drug induced) sx (3)
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similar sx to parkinson's
bradykinesia resting tremor cogwheel type rigidity |
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Pseudoparkinsonism incidence and in what drugs
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occurs in 10-40% of pt treated with FGAs
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pseudoparkinsonism onset
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Onset typically 1-3 months
after antipsychotic initiated May see as early as 1 week |
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risk factors of pseudoparkinsonism (4)
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High potency FGAs
High dose antipsychotics Over 40 years of age Females |
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second generation antipsychotics- drugs that cause it more (besides FGAs)
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Of SGAs, risperidone & paliperidone have higher
risk, particularly at higher doses |
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tx of pseudoparkinsonism (3)
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Lower the dose of antipsychotic
Switch to an SGA Add antiparkinsonian medication (anticholinergics- preferred- benztropine/trihexypenidyl) or amantidine is alternative |
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clinical characteristics of tardive dyskinesia (2)
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Abnormal, involuntary movements that are
potentially irreversible Movements are usually choreic (jerky), athetoid (wavy) or choreoathetoid (combo): May include chewing, tongue protrusion, lip smacking, puckering, involuntary movements of the trunk or limbs, etc. |
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onset of TD
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may be 3 mo to years after tx
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TD: why is the onset so long?
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DA hypersensitivity due to long term blockade- something happens in brain that tries to compensate for blockade and gives receptors that are hypersensitive
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risk factors for tardive dyskinesia (8)
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Age- Elderly (3-5X)
Long duration of treatment FGAs > SGAs Gender: Female Race: African Americans (2X) Affective (Mood) disorders Refractory Psychosis Early EPS |
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TD in FGA vs. SGA (3)
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Difficult to assess due to short duration of trials and 10 years of FGAs on market until TD recognized as a
problem so most everyone had been exposed to FGA at some point True risk with SGAs limited due to inability to tease out those not exposed to FGAs Reported mean annual incidence of TD (excluding elderly) -5.4% with haloperidol -0.8% with SGAs |
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tx?? of TD (more like how to manage) (3)
antipsychotic drug of choice for severe TD |
best tx if PREVENTION- monitor with AIMS continuously for ANY emergence of mvmts
d/c AP if possible- to prevent from getting worse (may not get better) ALTHOUGH sometimes you may not be able to d/c successfully because taking them off the blocker can sometimes make TD worse (more DA hitting receptors) if cna't d/c- switch to SGA or clozapine (drug of choice if severe TD) |
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agents that have been studied for TD and results (4)
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vit E
melatonin Acetylcholinesterase inhibitors branched chain amino acids not rec'd; no evidence |
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metabolic risk in schizophrenia (primary concern with SGAs) (3)
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already increased risk with schizo disease state due to:
prevalence of smoking (nicotine may stimulate cognition so may be self medicating), diabetes, CV disease higher risk of obesity due to ****** nutritional habits and sedentary lifestyle meds can exacerbate these issues |
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antipsychotics and weight gain (high/moderate/low risk)
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clozapine is the worst
olanzapine then quetiapine/risperidone (moderate weight effects) low risk: abilify, ziprazidone? lorasidone? |
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Antipsychotics- other metabolic abnormalities (2)
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lipid abnormalities- nt sure if related to weight gain
glucose dysregulation/diabetes- even without weight gain |
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drugs that cause the most lipid issues and the least (2 ea)
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Clozapine and olanzapine are reported to cause the
most weight gain and also have the most reports regarding increased triglyceride levels Aripiprazole and ziprasidone have minimal to no effect on weight & lipids |
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onset of AP diabetes
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Most cases of new onset diabetes developed
within 6 months after starting the antipsychotic |
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huge chart of metabolic stuff
best and worst |
olanzapine/clozapine- worst in temrs of metabolic ****
asenapine, aripriprazole, ziprasidone, lurasidone best |
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SGAs; metabolic monitoring: baseline (6)
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personal/family hx
weight waist circ BP fasting plasma glucose fasting lipid profile |
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SGAs: weight monitoring freq
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monthly for first 3 months then quarterly
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SGAs waist circ monitoring freq
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yearly
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SGAs BP monitoring; when to monitor
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at 3 months (and that's it?)
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glucose and lipid monitoring
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glucose: baseline, 3 mo, yearly
lipids: baseline, 3 mo, q5 years |
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QTc prolongation- warnings on which drugs (2 SGA and 3 FGA)
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thioridazine- BBW
and mesoridazine (removed- active metabolite of thiridazine) these were FGAs and haloperidol IV at high doses-->ECG monitoring if IV SGAs: ziprasidone and iloperidone- labeled warning |
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comparative QTc prolonging effects for SGAs- idk listen again
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thioridazine
oral haloperidol NBD and other SGAs also lurazidone actually has low QTc prolongation even though it looks high on chart in particular abilify has really low risk-good choice in pt with long qtc |
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normal QTc
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360-440 ms (higher in women by 20 ms)
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risk factors for QTc prolongation (5)
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Cardiac disease, electrolyte imbalance, bradycardia,
elderly, on concomitant QTc-prolonging drugs |
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for pt with risk factors for QTc what must you do before giving antipsychotics
when to d/c them and how to deal with it in terms of further tx of their psych issues (2) |
Recommend baseline ECG for at-risk patients
Discontinue antipsychotics if QTc >500 msec Consider reinitiating therapy with lower risk agent (e.g. aripiprazole, olanzapine??) |
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possible side effects based on pharmacology for APs (4)
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Anticholinergic side effects- specific ones on slide
H1 antagonism- sedation/weight 5-HT2c antagonism - weight gain Alpha-1 antagonsim Orthostatic hypotension, dizziness, sedation |
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most sedating
worst anticholinergic (2) most prolactin releasing (3) |
--
clozapine worst for anticholinergic (well, all side effects that are not DA related) chlorpromazine- also anticholinergic Both are most sedating haloperidol, CPZ, risperidone?? ( |
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counseling points: which drugs must be taken with food and why (2)
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ziprasidone and lurasidone
decrease in BA without food |
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counseling points: orthostasis- which drug and how to counter this
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iloperidone
must titrate slowly (1 wk schedule) CPZ, CLZ too???? |
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counseling points: SL tablet
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asenapine- should not eat or drink within 10 min of taking med
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Clozapine benefits (3)
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Most effective antipsychotic
Decreased risk of suicidal behavior & aggression Relatively low risk of EPS |
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Black box warnings for clozapine (4)
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agranulocytosis, seizures,
myocarditis, orthostatic hypotension |
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4 AE of clozapine
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Constipation: can be severe and even life-threatening- usually started on bowel regimen too
Sedation Adverse metabolic effects Sialorrhea (really awful drooling)- no dry mouth!!! hile clozapine is a muscarinic antagonist at the M1, M2, M3, and M5 receptors, clozapine is a full agonist at the M4 subset. Because M4 is highly expressed in the salivary gland, its M4 agonist activity is thought to be responsible for the hypersalivation |
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clozapine- it has so many side effects- what about efficacy?
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clearly superior in reducing sx so still the best drug we have
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Clozapine: Agranulocytosis incidence (2) post and premarketing
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Premarketing research incidence of 1-2%
Postmarketing data indicates incidence only 0.38% with 0.012% being fatal- maybe because we monitor so closely |
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monitoring for agranulocytosis/clozapine (4)
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WBC/ANC baseline and weekly x 6 months
Then every 2 weeks x 6 months After 12 months patient can go to monthly monitoring if no drops in WBC/ANC Perform WBC/ANC for at least 4 weeks after discontinuation (have to submit to national registry) |
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clozapine myocarditis- incidence and onset/sx
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again, low incidence
usually occurs within 3 weeks of starting therapy sx similar to CHF- fatigue, CP, fluid overload |
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clozapine seizures (2)
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All antipsychotics can lower seizure threshold;
seizure incidence 0.1-1.5% Clozapine associated with higher incidence than other antipsychotics at usual therapeutic doses |
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clozapine seizures- how to avoid
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titrate by doubling dose every few days when initiating
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Neuroleptic malignant syndrome (NMS)- incidence
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occurs in 0.5-1% pt on AP
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NMS sx (6)
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body temp increase
mental status changes tachy diaphoresis labile BP "lead pipe" rigidity |
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NMS- hard to distinguish from...
severity of this syndrome tx options (3) |
similar to serotonin syndrome
may be fatal if not tx and AP not d/ced tx primarily supportive care, bromocriptine (D2 agonist?), dantrolene |
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Long acting decanoate antipsychotics- PO overlap required in...(2)
rec'd in...(2) |
required in risperidone and aripriprazole
rec'd in haloperidol and fluphenazine |
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LAI options (6)
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haloperidol
fluphenazine risperidone paliperidone olanzapine aripriprazole |
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risperidone LAI (2) what kind of technology, release profile and implications
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Microsphere technology
Takes a long time to release...so Need to overlap with oral risperidone medication for 3 weeks (at least 2 injections before effects kick in) |
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paliperidone therapeutic advantage (3)
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therapeutic advantage over risperdal and Consta
No need for oral medication overlap Monthly vs. every 2 week injections No refrigeration or reconstitution needed |
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Olanzapine (zyprexa) LAI major issue
what is it onset risk mitigation strategy (2 things the pt has to do/can't do) restrictions |
post injection delirium sedation syndrome
Symptoms of olanzapine overdose 94% of reactions within 3 hrs of administration Risk Evaluation and Mitigation Strategy (REMS): patients must be observed for 3 hrs after EVERY injection; should not drive on day of injection Restricted distribution: prescriber, healthcare facility, patient, and pharmacy must all be enrolled with drug company |
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abilify LAI- oral overlap?
dose adjustments/metabolism issues (2) |
need to overlap with oral med for 2 weeks
must be dose adjusted for presence of 2D6/3A4 inhibitors or in pt who are 2D6 oor metabolizers avoid use with concomitant 3A4 inducers |
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important pharmacodynamic interactions of APs (3)
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Clozapine + carbamazepine = ↑ risk blood
dyscrasias Clozapine/iloperidone/quetiapine/ chlorpromazine + antiphypertensives = ↑ risk orthostasis QTc prolongation- Ziprasidone, thioridazine, IV haloperidol, TCAs, citalopram |
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metabolism pathways of atypical antipsychotics
3A4 (3) 2D6 (3) no CYPs (2) 1A2- (3) |
3A4- Q, ARI, LUR
2D6- ARI, RIS, ILO no CYPS- PALI, ZIP 1A2- CLZ, OLAN, ASEN |
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Important PK interactions of antipsychotics: CYP1A2 interactions (inducers and inhibitors)
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Inducers: cigarette smoking, carbamazepine,
omeprazole (weak to moderate) Inhibitors: fluvoxamine, fluoxetine (moderate), ciprofloxacin |
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omfg details of CYP1A2 mediated interactions of atypical psych meds-didn't really talk about
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Fluvoxamine + CLZ = ↑ CLZ level three- to four-fold
Fluvoxamine + OLZ/ASEN = ↑ antipsychotic levels Fluoxetine + CLZ = ↑ CLZ level ≈ 50% Cigarette smoking + OLZ/CLZ = ↓ OLZ/CLZ levels CBZ + OLZ/CLZ = ↓ OLZ/CLZ levels |
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CYP2D6 mediated interactions (3) inhibitors; what listen again; more details on slide she didn't go over
additional substrates metabolized by 2D6 (2) |
Additional substrates that are also metabolized by 2D6?? idk: haloperidol, phenothiazines
Inducers: none known Inhibitors: fluoxetine, paroxetine, bupropion |
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CYP3A4 mediated interactions
additional substrates (1) inducers (3) inhibitors (**** ton) |
Additional substrates: haloperidol
Inducers: CBZ, OXC, phenytoin Inhibitors: nefazodone, ketaconazole, itraconazole, ritonavir, erythromycin, clarithromycin, cimetidine, grapefruit juice |
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avoid what drug with QTP- one she specifically mentioned
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QTP + pneytoin = 5-fold increase in QTP CLEARANCE- significant-->avoid this combo
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lurasidone CI with which drug(s)
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strong 3A4 inhibitors
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Pregnancy and APs- risk for teratogenicity is greatest when
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Risk of teratogenesis from medication is
greatest during embryogenesis (3rd-8th week of gestation) |
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preferred APs in pregnancy (2)
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Haloperidol???
Clozapine is pregnancy category B, all others are category C (except lurasidone is now cat B?) Generally more data with typical antipsychotics |
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AP risk/FDA alert for newborn
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EPS and withdrawal sx in newborn- but still safer to use than to now use
|
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AP in elderly- major issue (3)
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Elderly patients with dementia related psychosis treated with antipsychotic drugs are at an increased risk of death compared to placebo
majority of deaths cauesd by CV and infectious (pneumo) reasons SO- NO SAFE AP in elderly pt with dementia- in both FGA or SGA |
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akathisia risk factors (4)
|
High potency FGAs
Commonly reported with aripiprazole High doses Rapid dose escalation |