Prescribing Psychotropics Management of Psychosis in Primary Care Learning Outcomes

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Prescribing Psychotropics Management of Psychosis in Primary Care Learning Outcomes Prescribing psychotropics Management of Psychosis in Primary Care Learning Outcomes • Pathophysiology • Mode of action of antipsychotics • Side‐effects • Management of some of the challenges Introduction • Psychosis – Includes schizophrenia, schizoaffective disorder, delusional disorder • 0.7% ‐ 1% • Reduced lifespan – metabolic disorder, suicide, • M:F • Lifelong • Suicide – 15% • Symptoms –+ve, ‐ve – quality of life • Cost >20 bn Aetiology • Genetic • Structural • Biochemical • Social –low socioeconomic status, poor housing, social isolation, loss of cultural identity and discrimination • Environmental • Psychological –stressful life events Genetics of Schizophrenia A heterogeneous disorder or set of disorders. Often triggered by stress at puberty / early adulthood Behavioural effects of disordered brain development then become manifest Neurodevelopmental structural changes Symptoms Positive Negative • Hallucination • Social withdrawal • Delusion • Avolition/Apathy • Thought disorder • Blunted affect • Poverty of speech Dopamine hypothesis of schizophrenia Schizophrenia is associated with impaired dopaminergic neurotransmission in the brain Hypoactivity in Hyperactivity in the mesocortical pathway mesolimbic pathway - Negative symptoms -Positive symptoms - Impaired learning and memory Normal dopamine Normal dopamine activity in activity in tuberoinfundibular nigrostriatal pathway pathway (involved in prolactin (involved in regulation movement regulation) Dopamine hypothesis of schizophrenia The Dopamine Theory • DA‐ergic hyperactivity in Mesolimbic forebrain areas D‐amphetamine causes paranoia, delusions & auditory hallucinations at high doses Stimulants can exacerbate psychosis All typical neuroleptics block D2receptors & alleviate positive symptoms • Structural changes – limbic forebrain smaller and disorganised • Risk factors –stress, alcohol, drugs, smoking cannabis • Reduction in Mesocortical DA activity is known to be responsible for negative symptoms Effects of Dopamine agonism and antagonism Mesocortical Mesolimbic Nigrostriatal pathway pathway pathway Dopamine Increased Positive mood1 Motor activity2 receptor attention and Euphoria/mania concentration1 agonism Psychoses Dopamine Decreased Negative mood1 Extrapyramidal receptor attention and symptoms2 antagonism concentration1 1. Nutt DJ et al. J Psychopharmacol 2007;21:461–71; 2. Shiloh R, et al. Atlas of Psychiatric Pharmacotherapy. Second edition. Oxford: Taylor & Francis; 2007. More than dopamine! Effects of serotonin agonism and antagonism at main 5HT receptor subtypes in the brain Effect at 5HT1A 5HT2A 5HT2C receptor Agonist Anxiolytic Psychosis3 Insomnia5 1,2 effect Hallucinations4 Anxiety2 Antidepressant Satiety3 effect1,2 Antagonist Turns off Antidepressant Possible autoreceptor effect2,6 increased 3 4 activity Possible appetite/weight antipsychotic effect2,3 Can counteract EPS effect of D2 blockade3 1. Blier P et al. Biol Psychiatry 2003;53(3):193–236; 2. Hardman JG et al. (eds) Goodman and Gillman’s The Pharmacological Basis of Therapeutics. New York: McGraw Hill; 2001; 3. Correll C et al. J Clin Psych 2008; 69 (Suppl 4): 26–36; 4. Gouzoulis-Mayfrank, E. Neuropsychopharmacology. 2006 Feb;31(2):431–41; 5. Quintin P et al. Encephale 2004;30:583–9; 6. Mann N. Engl J Med 2005;353:1819–34. • Serotonergic projections to prefrontal cortex mediate cognitive effects • Mediates inhibition of DA release from dopaminergic pre‐synaptic neurones • Second generation antipsychotics have mixed 5‐HT profiles – Reduced extrapyramidal side profile –Some serotonergic side effects (weight gain‐5HT2C) Other receptor activitites affected by antipsychotics and effects Receptor Noradrenaline Noradrenaline Histamine ACh ACh type Alpha 1 (α1) Alpha 2 (α2) H1 M1 M2-M4 Effect at (central) (peripheral) receptor Agonism Anxiety1 Memory2 Arousal 3 Arousal4 Nausea3 Anti- Attention2 Insomnia3 Memory4 Diarrhoea3 1 depressant 5 Seizures Bradycardia Antagonism Postural Anti-depressant Sedation Amnesia Blurred vision 3 hypotension Increased Anxiolytic Decreased Constipation Dizziness alertness Weight cognition Urinary Tachycardia Increased blood gain Dry mouth retention Syncope pressure Anti-EPS Tachycardia Hypertension Antipsychotics Typical Atypical Partial pharmacology pharmacology agonist 5HT2 dopamine dopamine dopamine Haloperidol Clozapine Amisulpride Aripiprazole Zuclopenthixol Olanzapine Lurasidone Flupenthixol Quetiapine Sulpiride Risperidone First-generation (“typical”) AP Side Effect Profiles Usual Sedation Movement Weight Anticho- Sexual Drug daily problems gain linergic problems dose Chlorpromazine 75-300mg • • • • • • • • • • • • Haloperidol 5-20mg • • • • • • • • • • Levomepromazine 100-200mg • • • • • • • • • • • • 5-20mg Pericyazine • • • • • • • • • • • • Perphenazine 12-24mg • • • • • • • • • • • 400- Sulpiride 1,600mg • • • • • • • • • Trifluoperazine 5-15mg • • • • • • • • • • Second-generation (“atypical”) AP Side Effect Profiles Usual daily Sedation Movement Weight Antichol Sexual Drug dose problems gain inergic problems Amisulpride 400-800mg (Solian®) •• •• ••• • • Aripiprazole 15-30mg (Abilify®) ••††† Clozapine Usually (Clozaril®, Denzapine®, • • • • • • • • • • • 300-600mg Zaponex®) Olanzapine 10-20mg (Zyprexa®) • • • • • • • • • Paliperidone 6mg (Invega®) •• •• •• • • Risperidone 4-6mg (Risperdal®) •• •• ••• • Quetiapine Around (Seroquel®) 600mg • • • • • • • • Zotepine Up to 300mg (Zoleptil®) • • • • • • • • • • • NICE CG187 guidance Primary care • Referral from primary care • Monitoring and follow up • Promote wellbeing and relapse prevention 19 November, 2019 20 Management of Challenges in Clinical Practice Non‐adherence Shared decision, Reasons explored, Depot, Psychological intervention, Increased follow up, CBT Physical monitoring Q‐RISK (Intervention –smoking, Yearly –ECG, Lipids, Weight, BP, Pulse, HbA1c, diabetes, obesity, lipids) Side‐effect: GASS, clozapineGASS Weight gain & Metabolic Diet & exercise, CBT disorder Movement disorders Dose adjustment, procyclidine, second generation AP Sexual dysfunction Prolactin level, management of mental condition Sedation Dose adjustment and time of administration Constipation Laxatives prophylaxis, diet and lifestyle Management of Challenges in Clinical Practice Information PILs Off label prescribing Information, discussion, consent, documentation Interaction: Smoking Smoking cessation, monitoring Other medication ‐ carbamazepine Avoid with clozapine, dose adjustment 19 November, 2019 22 Management of Depression in Primary Care Introduction • Increasing prevalence • High risk of mortality • 21% suicide rate • F>M • Social, economic, ethnic factors • Associated with increased comorbidity of psychiatric and medical conditions • Worsens outcome of general medical conditions Morbidity/mortality post‐myocardial infarction Risk of mortality in nursing home patients Morbidity post‐stroke May worsen outcomes in cancer and HIV Pathophysiology • Genetic – altered neurotransmitter Risk Factors: and receptor activity in response to triggers. • Family history, early life adverse experience, life events such as divorce, • The two hypothesis are high level of pregnancy, physical conditions e.g. cortisol and functional deficit of Diabetes, CVD, other mental condition, noradrenaline, serotonin, GABA and changes in sleep patter, social isolation, dopamine transmission in the central abuse, medication e.g. isotretinoin, nervous system. alcohol, personality traits, social circumstances. • Structural brain changes have been noted in severe depression: ventricular enlargement; reduced grey matter in left hippocampus, basal ganglia and thalamus. Role of Serotonin and Noradrenaline in Mental & Physical Processes Present in many mental and physical processes: • Anxiety • Pain perception • Vasoconstriction • Urethral sphincter contraction • Bladder wall relaxation • Gastrointestinal motility • Pilomotor contraction Symptom classification for depression – more than feeling sad! Emotional Cognitive Behavioural Physical Symptoms Symptoms Symptoms Symptoms Low Mood Reduced Attention Anhedonia Low Energy Guilt Reduced Tearfulness Reduced Sleep Worthlessness Concentration Irritability Reduced Appetite Suicidal Thoughts, Anxiety Reduced Libido Ideas or Actions Social Withdrawal Painful Symptoms Reduced Confidence 19 November, 2019 27 Diagnosis • NICE recommends PHQ‐9, BDl‐ll, HADS Symptoms: when examining mental state through observation and direct questioning, against • A: Depressed mood present most of the DSM‐5 or ICD11 criteria. Five or more of day and almost every day these symptoms must have been present • B: Loss of interest or pleasure in usual during the same two‐week period and activities represent a change from previous • C: Decreased energy or increased functioning. fatigability • D: Loss of confidence or self‐esteem • Differential diagnosis such as • E: Unreasonable feelings of guilt hypothyroidism, low folate as well as other • prescribed medication e.g steroids should F: Recurrent thoughts of death or be considered, investigated and managed. suicide • G: Complaints of diminished ability to think or concentrate • The severity of the depression is based on • H: Change in psychomotor activity, the number of symptoms the patient has in with agitation or retardation addition to the two core symptoms of low mood and lack of interest or enjoyment as • I: Sleep disturbance well as loss of daily living functions • J: Change in appetite 19 November, 2019 28 NICE CG90 Depression 19 November, 2019 29 Management: Treatment Aim • Pharmacological
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