psychotic disorders Flashcards
What is the effect of schizophrenia on dopamine?
It increases dopamine
- Increase in mesolimbic cortex causes POSITIVE
- Decrease in prefrontal cortex causes NEGATIVE
Are the levels of the following neurotransmitters increased or decreased in schizophrenia?
- serotonin
- NE
- GABA
- Glutamate
- increased
- long term antipsychotics decrease NE
- decreased
- decreased
What antipsychotics antagonize serotonin and weakly antagonize dopamine?
Atypicals- respiridone clozapine olanzapine quetiapine aripiprazole ziprasidone
What are the 4 first-generation antipsychotics?
Which are high/low potency?
What neurotransmitter do they affect?
- Chlorpromazine - low
- haliperidol- high
- thioridazine-low
- trifluoperazine -mid/high
They are all D2 antagonists
What are the most common side effects of first generation antipsychotics?
- EPS
- TD
- NMS
How does the side effect profile differ for atypical and typical antipsychotics?
atypicals have less EPS, but more metabolic syndrome
You started a patient on an atypical antipsychotic. What labs do you need to check?
- glucose
- waist circumference, BMI
- lipids
- BP
What are possible treatments for EPS?
Dystonia, Parkinsonism
- benztropine, diphenhydramine
Akathesia
-beta blocker
Both- benzos
What are the “weight neutral” second generation antipsychotics?
ziprasidone and aripiprazole
*also encourage exercise, diet, smoking cessation
A patient starts trifluoperazine and now is disoriented, has a high fever, elevated BP and tachycardia. They become rigid and are sweating with elevated CPK leukocytosis and metabolic acidosis. Whats the problem? Whats the treatment?
Neuroleptic malignant syndrome
Treatment:
1. withdrawal of all antipsychotic meds
2. cool patient off, dark room, etc to damp down sympathetics
What is the major side effect of clozapine?
agranulocytosis requiring weekly blood draws
What is the major side effect of thioridazine?
Irreversible retinal pigmentation
What is treatment for schizophreniform disordeR?
- hospitalization
- antipsychotics for 3-6 months
- supportive psychotherapy
What is the criteria for schizoaffective?
- MDD, bipolar 1 or bipolar 2
- delusions or hallucinations for 2 wks in the absence of mood symptoms
- mood symptoms for a substantial part of the psychotic illness
What 3 groups of people are most likely to experience delusional disorder?
- over 40
- immigrants
- hearing impaired