Psychopharmacology 2 Flashcards
Indications for antipsychotics
Schizophrenia,
Schizoaffective disorder,
Bipolar disorder
Describe mesocortical pathway
Projects from ventral tegmentum to the cerebral cortex
Where negative sympt0ms and cognitive disorder arise
Issue of mesocortical pathway in psychotic patients
Too little dopamine
Describe mesolimbic pathways
Projects from the dopaminergic cell bodies in the ventral tegmentum to the lambic system
This pathway is where the positive symptoms come from
Problem with mesolimbic pathways in psychotic patients
Too much dopamine
Types of antipsychotics
Typical
Atypical
What is the action of typicals antipsychotics
D2 dopamine receptor antagonistis
Examples of typical antipsychotics with high potency
Fluphenazine,
Haloperidol,
Pimozide
What side effects do high potency typical antibiotics have
Extrapyramidal
Examples of low potency typical antipsychotics
Chlopromazine
Thioridazine
Side effects of low potency typical antipsychotics
Cardiotoxic and anticholinergic adverse effects- sedation, hypotension
What are atypical antipsychotics
Serotonin-dopamine 2 antagonists
Examples of atypical antipsychotics
Risperidone, Olanzapine, Quetiapine, Aripiprazole, Clozapine
Risperidone side effects
Increased extrapyramidal,
Hyperprolactinemia,
Weight gain,
Sedation
Olanzapine side effects
Weight gain, Hypertriglyceridemia, Hypercholesterolemia, Hyperglycaemia, Abnormal LFTs, Hyperprolactinemia
Quetiapine side effects
orthostatic hypotension, Abnormal LFTs Weight gain, Hypertriglyceridemia, Hypercholesterolemia, Hyperglycaemia,
Aripiprazole positive
Not associated with weight fain
When is clozapine used?
Reserved for treatment of resistant patients
Side effects of clozapine
Agranuloocytosis,
Increased risk of seizures,
Most sedation, weight gain and abnormal LFTs,
Increased risk of hypertriglyceridemia, hypercholesterolemia, hyperglycaemia,
Nonketotic hyperosmolar coma and death
Antipsychotics adverse effects
Tardive dyskinesia,
Neuroleptic malignant syndrome,
Extrapyramidal side effects
What is tardive dyskinesia
Involuntary muscle movements that may not resolve with drug discontinuation due to antipsychotics
What is neuroleptic malignant syndrome
Severe muscle rigidity, fever, altered mental status, autonomic instability,
Elevated wbc, CPK,
Fits
Extrapyramidal side effects of antipsychotics
Acute dystonia,
Parkinson syndrome,
Akathisia
Treatment for extrapyramidal se
Anticholinergics (eg benztropine, tihexyphenidyl, diphenhydramine) Dopamine facilitators (Amantadine), Beta blockers (propranolol)
Baseline blood work to do on someone before starting antipsychotics
Fading lipid profile,
Fasting blood sugar,
LFTs,
FBC
What are anxiolytics used to treat
Panic disorder, Generalised anxiety disorder, Substance related disorder and withdrawal Insomnias Parasomnias
Anxiolytics drugs
Buspirone,
Benziodiazapams
Buspirone cons
Takes around 2 weeks to work,
Won’t reduce anxiety
Side effects of benzodiazepines
Somnolence, Congnitive deficits, Amnesia, Disinhibition, Tolerance, Dependence
Describe the nigrostriatal dopamine pathway with regards to psychotic symptoms
D2 blockade by antipsychotics associated with parkinsonian side-effects
Describe the tuberoinfunibular dopamine pathway with regards to psychosis
D2 blockade by antipsychotics leads to increased prolactin levels and hyperprolactinaemia
What diseases are people on atiosychotics at a higher risk of getting
Diabetes,
Metabolic syndrome,
Hyperprolactinaemia,
QT prolongation leading to Torsade De Pointes,
What is metabolic syndrome
Syndrome of obesity, hypertension, dislipidaemia and abnormal glucose metabolism
Diagnosed if 3 or more are present:
BP >130/85
Serum HDL cholesterol >1.04 (male) or >1.29 (female)
Serum triglyceride (>1.69)
Waist circumference >102 cm (male) or >88 (female)
What antipsychotics can cause hyperprolactinaemia
Amisulpride,
Risperidone,
Typical antipsychotics
Hyperprolactinaemia symptoms
Galactorrhea, Menstrual irregularities, Sexual dysfunction, Osteoporosis, Increased risk of breast cancer
What antipsychotic doesn’t cause tardive dyskinesis
Clozapine