Antipsychotics Flashcards
typical antipsychotics moa
dopamine D2 blockers; decrease positive symptoms (hallucinations, disorganization of thought and behavior)
atypical antipsychotics moa
D2 and 5-HT2A antagonism
haloperidol moa/potency
D2 block; high potency
butyrophenones
haloperidol
only approved agent for children and teens
risperidone
aripiprazole moa
D2 partial agonist, 5-HT2a antagonist; 5-HT1a partial agonist (lower incidence of side effects)
asenapine moa
D1, D2, 5-HT2, alpha adrenergic and histamine receptor antagonist (low muscarinic affinity)
anti-psychotic extrapyramidal side effects
acute dystonia, akathesia, parkinsonian syndrome, neuroleptic malignant syndrome, perioral tremor, tardive dyskinesia
acute dystonia symptoms and treatment
symptoms: muscle spasms, facial grimacind, stiff neck, oculogyric crisis
Tx: anticholinergic antiparkinsonian agents
akathesia symptoms and treatment
symptoms: strong subjective feelings of distress or discomfort often referred to the legs
Tx: decrease dose, add antiparkinsonian agent, anti anxiety agent or propranolol
neuroleptic malignant syndrome symptoms and treatment
Symptoms: fever, severe parkinsonism with catatonia, fluctuations in coarse tremor intensity, autonomic instability, elevated creatinine kinase, myoglobinemia, high mortality
Tx: cessation of antipsychotic, supportive care, dantrolene or bromocriptine
antipsychotic effects on the brainstem
decreased vasomotor reflexes at low doses
antipsychotic effects on the CTZ
protect against N./V at low doses
drugs that cause increased PRL
all typical and risperidone
little increase: clozapine, olanzapine, and ziprasidone
likely to increase risk of type 2 DM
clozapine and olanzapine