Psychosis: Antipsychotic Drugs (34) Flashcards
Positive symptoms of schizophrenia
-delusions
-paranoia
-hallucinations
-disorganized or catatonic behaviour
Negative symptoms of schizophrenia
-flat emotions
-withdrawal from social contacts, lack of speech, poor self care
-avolition
Antipsychotics =
Neuroleptics
Indications for antipsychotics
-serious mental illnesses (schizophrenia, bipolar disorder, autism)
-movement disorders
Three major objective with schizophrenia drug therapy
-suppress acute episodes
-reduce relapse
-maintenance of the highest possible level of functioning
Adjunctive drugs
Benzodiazepines and antidepressants
Which symptoms of schizophrenia responds better to treatment
Positive symptoms
First gen antispsychotics
Chlorpromazine
Second gen antipsychotics
Clozapine
Typical antipsychotics MOA
Dopamine receptor antagonists
-block receptors in CNS
AE of typical antipsychotics
DA receptor antagonism
-motor disturbances
Extrapyramidal motor disturbances
Early onset
-acute dystopias (muscle tension, neck, face, tongue, eyes)
-pseudoparkinsonism
-akathisia
-tar dive dyskinesia
Extrapyramidal motor disturbances vs Extrapyramidal symptoms
2 terms same meaning
Other AE of typical antipsychotics
-neuroleptic malignant syndrome
-therapy
-neurological
-CNS
-CV
-dermatological
AE of typical antipsychotics: Neuroleptic malignant syndrome
4 to 14 days after therapy
-lead pipe rigidity
-sudden high fever
-CV problems
-may end in seizures or coma
AE of typical antipsychotics: Therapy
Removal of typical antipsychotic drug
-bromocriptine
AE of typical antipsychotics: neurological
Extrapyramidal motor disturbances
AE of typical antipsychotics: other CNS
Sedation and delirium
AE of typical antipsychotics: cardiovascular
Othrostatic hypotension, syncope, dizziness, ECG changes
Atypical antipsychotics/second generation example
Clozapine
Atypical antipsychotics
Newer drugs in Canada
MOA atypical antipsychotics
Block 5 HT receptors
-less effect on DA
-equal efficacy to typical antipsychotics
Clozapine AE
Haematological, drooling, agranulocytosis
All antipsychotics may cause
Weight gain, disturbances in metabolism, extent varies with drug