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13458994
Psychoses Pharmacotherapy
Descrição
Part of chapter 17: Drugs for psychoses
Sem etiquetas
psychotic disorder
psychoses
pharmacotherapy for psychoses
schizophrenia
antipsychotics
pharmacology
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Mapa Mental por Usuário eliminado, atualizado more than 1 year ago
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Olivia McRitchie
mais de 6 anos atrás
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Olivia McRitchie
mais de 6 anos atrás
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Psychoses Pharmacotherapy
Management
Many patients don't see behavior as strange
May not understand need for meds.
May become agitated, distrustful, and extremely frustrated b/c they may not comprehend why others can't think like them.
Noncomplience may result when side effects are severe
Especially high in schizophrenics.
Primary goal is reducing symptoms to allow social relationships and ADLs
Can be controlled, but adverse effects are common and sometimes severe/
Little difference in efficacy among drugs.
Newer ones have lower incidence of adverse effects.
Drug selection is based on clinician experience, occurrence of adverse effects, and pt. needs.
3 generations of antipsychotics.
Conventional Antipsychotics (first gen)
Also called neuroleptics b/c of neurologic side effects.
Phenothiazines
Positive signs of schizophrenia.
Block excitement associated w/symptoms.
Difference in potency & side effect profiles.
Hallucination & delusions diminish within days, but other symptoms can require 7-8 wks.
Life-long treatment.
Prevent dopamine & serotonin from occupying critical neurologic receptor sites.
Anticholinergic effects are common.
Dry mouth, postural hypotension, & urinary retention.
Ejaculation disorders & delay in orgasm are common causes for noncompliance
Menstrual disorders also common
High fever, tachycardia, incontinence, confusion, and other signs of NMS may occur.
Each drug has slightly different side effect spectrum
Many of these have a broader spectrum of action than just psychoses.
Many have calming effects & ease restlesness.
Perminant extrapyramidal effects can result
Dystonia, akathisia, secondary parkinsonism, and tardive dyskinesia
Acute dystonias occur early on.
Severe muscle spasms,
Akathisia is most common; pt. cannot rest or relax.
Symptoms of secondary parkinsonism include tremor, muscle rigidity, stooped posture, and shuffling gait.
Tardive dyskinesia occurs w/long term therapy.
Unusual tongue & face movement, such as lip smacking & wormlike tongue motions.
Concurrent use of an anticholinergic may be indicated when EPS cannot be prevented.
Benzotropine (Cogentin) may be used for acute dystonia.
Meds w/levodopa are usually avoided,
Beta-blockers and benzos are sometimes given for akathisia
Non-phenothiazines
Therapeutic effects & efficacy equal to phenothiazines
Same spectrum of adverse effects as phenothiazines.
Less sedation & fewer anticholinergic effects.
CNS depressants may have an additive effect.
They also block postsynaptic D2 dopamine receptors.
No significant advantage over phenothiazines in treating schizophrenia.
Atypical antipsychotics (second gen)
Treats both positive and negative symptoms.
Exhibit therapeutic action w/o EPS effects.
Action likely unknown, but thought to block dopamine D2, serotonin, and alpha-adrenergic receptors.
Loosely bound to D2 receptors, so fewer EPS symptoms are caused.
Adverse effects are fewer, but still significant. Pt. must be monitored.
Increased risk of weight gain, diabetes, hypertriglyceridemia, and stroke.
Increased risk for death if used to treat dementia-related psychoses.
Some of these increase prolactin, which can lead to menstrual disorders, decreased libido, and osteoporosis in women.
Decreased iibido, impotence, and man boobs in men.
Dopamine-Serotonin System Stabilizers (third gen).
Also controls both positive and negative symptoms.
Well tolerated in schizophrenics.
Associated w/lower incidence of EPS than haloperidol, and fewer weight-gain issues than other atypicals.
Anticholinergic effects are virtually non-existent.
Ariprprazole (Abilify) is also used for bipolar and mixed episodes of mania and depression.
Aripiprazole is used with brexpiprazole for major depressive disorder
Side effects include headache, nausea, vomiting, fever, constipation, and anxiety.
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