Mental Health Disorders Flashcards
What are the psychological symptoms of anxiety?
Restlessness Worry Fear Difficulty concentrating Irritability
What are the physical symptoms of anxiety?
Palpitations Muscle aches and tension Trembling or shaking Excessive sweating Shortness of breath Insomnia
What class are benzodiazepines?
CD4 part 1
What are the benzodiazepines?
Alprazolam Clobazam Chlordiazepoxide Diazepam Lorazepam Oxazepam
What benzodiazepines are better for use in elderly?
Short acting
Lorazepam
Oxazepam
Greater risk of withdrawal symptoms
What beta blockers are used for palpitations in anxiety?
Propranolol
Oxprenolol
What is buspirone?
5HT1a agonist
Low potential for abuse and dependence
Takes two weeks to work
What is the mechanism of action of benzodiazepines?
Facilitates and enhances the binding of GABA to the GABAa receptor to cause widespread depressant effect on synaptic neurotransmission
What are benzodiazepines used for?
Short term (2-4 weeks) relief of anxiety that is severe, disabling or causing patient unacceptable distress
What are the side effects of benzodiazepines?
Paradoxical increase in hostility aggression
Overdose - ataxia, drowsiness, dysarthria, nystagmus, respiratory depression, coma
Sedation
Dependence
How do you withdraw benzodiazepines?
Gradually convert to equivalent diazepam dose ON
Reduce diazepam dose by 1-2mg every 2-4 weeks
Reduce further
What are the diazepam drug interactions that increase sedation and CNS depressant effects?
Alcohol Opioids Antihistamines Antidepressants Barbiturates Antipsychotics Z-drugs
What are the diazepam interactions that increase plasma concentrations?
Amiodarone
Diltiazem
Macrolides
Fluconazole
What are the symptoms of ADHD?
Hyperactivity
Impulsivity
Inattention
What is the treatment for ADHD in children 5 years + and young people?
Methylphenidate first line
Lisdexamfetamine second line
Atomoxetine/guanfacine alternative
What is the ADHD treatment in adults?
First line methylphenidate/lisdexamfetamine
Alternative atomoxetine
What is the mechanism of action of methylphenidate?
Potent CNS stimulant
Increases dopamine and noradrenaline levels in the brain
What are the side effects of methylphenidate?
Appetite loss Insomnia Weight loss Increased heart rate and blood pressure Tics and Tourette’s Growth restriction
What needs to be monitored with methylphenidate?
Pulse
BP
Appetite
Weight and height
Psychiatric symptoms
What are the contraindications of methylphenidate?
Cardiovascular disease Hyperthyroidism Hypertension Uncontrolled bipolar Severe depression
Prescribe by brand for MR
What is the mechanism of action of dexamfetamine and lisdexamfetamine?
Potent central nervous system stimulant
Increases dopamine and noradrenaline levels in the brain
What are the side effects of lisdexamfetamine and dexamfetamine?
Appetite loss Anorexia Increased heart rate and blood pressure Tics and Tourette’s Growth restriction in children
What are the signs of lisdexamfetamine overdose?
Wakefulness Hyperactivity Paranoia Exhaustion Convulsions Hyperthermia Coma
What is the monitoring needed for lisdexamfetamine and dexamfetamine?
Pulse BP Appetite Weight and height Psychiatric symptoms
What are the contraindications of lisdexamfetamine and dexamfetamine?
CVD
Hyperthyroidism
Hypertension
Agitated states
What is the mechanism of action of atomoxetine?
Noradrenaline reuptake inhibitor causes increased levels of noradrenaline at synaptic cleft
What are the side effects of atomoxetine?
Suicidal ideation
Hepatotoxicity
QT prolongation
What are the side effect counselling points of atomoxetine?
Report suicidal thoughts, self harming behaviour
Report signs of liver toxicity
What is the monitoring needed for atomoxetine?
Pulse BP Psychiatric symptoms Appetite Weight Height
What is bipolar disorder?
Characterised by extreme mood swings
Bipolar episode can last several weeks or months
What are the two types of bipolar episodes?
Mania
Depression
What do you give for acute mania and hypo mania?
Benzodiazepines - short term use, risk of dependence
Antipsychotics - quetiapine, olanzapine, risperidone
Lithium or valorous acid added if inadequate
Asenapine in moderate-severe manic episodes
What do you use for prophylaxis of bipolar disorder?
Lithium salts
Valproate
Olanzapine
Carbamazepine
What are the contraindications in bipolar disorder?
Do not give antidepressants in - rapid cycling bipolar disorder, recent history of hypo mania, manic episode, rapid mood fluctuations
What are the lithium salts used for?
Prophylaxis and treatment of mania, hypo mania and depression in bipolar disorder, resistant depression and aggressive or self harming behaviour
What is the therapeutic range for lithium?
- 4 - 1 mmol/L - lower end for prophylactic/elderly
0. 8 - 1 mmol/L - acute manic episodes
What is the monitoring needed for lithium?
12 hours post dose
Monitored every 3 months
Additional monitoring if significant inter current illness or significant changes to diet or water intake
Why should you avoid abrupt withdrawal of lithium?
Warn patients of higher risk of relapse
What are the signs and symptoms of lithium toxicity?
Revenge
Renal disturbances Extra pyramidal symptoms Visual disturbances Nervous system disturbances GI effects
> 2 mmol/L - renal failure, arrhythmias, seizures, BP changes, circulatory failure, coma, death
What are the side effects of lithium?
Thyroid disorders Renal impairment Benign intracranial hypertension QT prolongation Lowers seizure threshold
What are the counselling points for the side effects of lithium?
Report hypothyroidism symptoms
Report renal dysfunction
Report persistent headaches, visual disturbance
Does hyper or hyponatraemia predispose lithium toxicity?
Hyponatraemia
What are the counselling points for lithium?
Report signs and symptoms of lithium toxicity
Maintain salt and water intake
Lithium treatment pack
Can cause drowsiness avoid alcohol
OTC interactions - ibuprofen, soluble analgesics, antacids
Is lithium teratogenic?
Yes
Need effective contraception
Toxicity can occur in breast fed infants
What are the lithium interactions that increase risk of seizures?
Ciprofloxacin
SSRIs
Epilepsy
What are the lithium interactions that increase risk of arrhythmias due to QT prolongation?
Quinolones Citalopram Clarithromycin Amiodarone Antipsychotics Imipramine Theophylline Corticosteroids B2 agonists Loop/thiazide
What are the lithium interactions that increase risk of lithium toxicity due to reduced renal excretion?
ACEi
ARB
NSAIDs
What are the lithium interactions that increase risk of hyponatraemia and so predispose lithium toxicity?
Diuretics
Antidepressants
What are the lithium interactions that increase risk of extrapyramidal symptoms?
Haloperidol Clozapine Phenothiazines Parkinson’s disease Metoclopramide
What drugs used with lithium affect the salt balance?
Soluble analgesics
Sodium containing antacids
What are the lithium interactions that increase risk of neurotoxicity?
Phenytoin
Carbamazepine
Antipsychotics
Amitriptyline
What are the lithium interactions that increase risk of serotonin syndrome?
Sumatriptan Citalopram Granisetron MAOIs Amfetamines St Johns Wort Tramadol
What are the psychological symptoms of depression?
Low self esteem
Worry and anxiety
Suicidal thoughts
What are the physical symptoms of depression?
Lack of energy
Changes in weight/appetite
Insomnia
How do antidepressants work?
Depression is thought to be caused by under activity of monoamine neurotransmitters
Antidepressants increase monoamine levels at synapse
What are the tricyclic antidepressants?
Raises 5HT, NA
Amitriptyline Clomipramine Dosulepin Imipramine Nortriptyline
What are the tricyclic related antidepressants?
Mianserin
Trazodone
What are the selective serotonin reuptake inhibitors?
Raises 5HT
Citalopram (QT prolongation) Escitalopram (QT prolongation) Fluoxetine (only antidepressant given in children) Fluvoxamine Paroxetine Sertraline - safe to use after MI
What are the irreversible monoamine oxidase inhibitors?
Raise 5HT, NA, DA
Phenelzine
Isocarboxazid
Tranylcypromine
What are the reversible monoamine oxidase inhibitors?
Moclobemide
What are antidepressants used for?
Moderate to severe depression
What are the first line antidepressants?
SSRIs
Better tolerated and safer in overdose
Less sedating, antimuscarinic, epileptogenic, cardiotoxicity than TCAs
MAOIs rarely used
How long does it take for antidepressants to work?
At least two weeks
Initially feel worse, increased agitation, anxiety, suicidal ideation
Review every 1-2 weeks
Wait at least 4 weeks
How long should you take antidepressants for?
At least six months after remission
12 months in generalised anxiety
2 years in recurrent depression
What is the second line depression treatment?
Increase SSRI dose
Different SSRI
Mirtazapine
What are the alternative antidepressant treatments?
Lofepramine
Reboxetine
Moclobemide
Other TCAs
Venlafaxine
Irreversible MAOIs
What are the side effects of antidepressants?
Hyponatraemia - drowsiness, confusion, convulsion
Suicidal ideation and behaviour
Serotonin syndrome
What are the symptoms of serotonin syndrome?
Neuromuscular hyperactivity - tremors, myoclonus, muscle rigidity
Altered mental state - agitation, confusion, mania
Autonomic dysfunction - labile blood pressure, urination, diarrhoea, hyperthermia, tachycardia, pallor, sweating, shivering
How do you switch between different antidepressants?
Washout period required when antidepressant is stopped before switching to different antidepressant class, avoid serotonin syndrome
What is the washout period for MAOIs?
Wait 2 weeks before switching
Except meclobomide which doesn’t need a washout period
What is the washout period for SSRIs?
Wait 1 week before switching
2 weeks if sertraline
5 weeks if fluoxetine
What is the washout period for TCAs?
Wait 1-2 weeks before switching
3 weeks if imipramine or clomipramine
Why do you need to avoid abrupt withdrawal for antidepressants?
Withdrawal reactions occur within 5 days of stopping
Risk of withdrawal reactions is increased if antidepressant stopped suddenly after taking for 8 weeks or more
Reduce dose gradually over 4 weeks
What antidepressants have a higher risk of withdrawal reaction?
Paroxetine
Venlafaxine
What is the mechanism of action of SSRIs?
Selectively inhibit the reuptake of 5HT from synaptic cleft
What are the side effects of the SSRIs?
GASH
GI
Appetite or weight disturbances
Serotonin syndrome
Hypersensitivity reactions
Bleeding risk increased
QT interval prolongation with citalopram/escitalopram
Seizure threshold lowered
Movement disorders and dyskinesia
Which SSRI is used in children?
Fluoxetine
Which SSRI is used in MI/unstable angina?
Sertraline
Which SSRIs cause QT prolongation?
Citalopram
Escitalopram
What are the symptoms of SSRI overdose?
Nausea Vomiting Agitation Tremors Nystagmus Drowsiness Sinus tachycardia Convulsions
What drugs cause an increased plasma concentration when used with SSRIs?
Grapefruit juice
What drugs cause an increased risk of bleeding when used with SSRIs?
NSAIDs/aspirin
Anticoagulants
Antiplatelets
What drugs cause an increased risk of QT prolongation when used with SSRIs?
Erythromycin TCAs Sotalol Amiodarone Chloroquine Mefloquine Lithium Quinine Antipsychotics Theophylline Beta 2 agonists Loop/thiazide diuretics Corticosteroids
Hypokalaemia increases risk of torsade de pointes
What drugs cause an increased risk of hyponatraemia?
Diuretics
Desmopressin
Carbamazepine
NSAIDs
What drugs cause an increased risk of serotonergic effects/serotonin syndrome when used with SSRIs?
St Johns Wort Amfetamines Sumatriptan Selegiline Tramadol TCA MAOI Ondansetron
What is the mechanism of action of TCAs?
Inhibits reuptake of 5HT and NA
Also blocks a wide array of receptors M, H1, a1/2, D2
What is the dose of TCAs?
Once daily at night
Which TCAs are sedating?
Amitriptyline Clomipramine Dosulepin Doxepin Trimipramine
Mianserin
Trazodone
What TCAs are less sedating?
Imipramine
Lofepramine
Nortriptyline
What are the side effects of TCAs?
More sedating, more epileptogenic, more cardiotoxicity, more antimuscarinic than SSRIs
Toxic
Cardiac effects
Antimuscarinics
Seizures
Hallucinations Mania Hypotension Sexual dysfunction Breast changes EPS
What are the drugs that reduce plasma concentrations when used with TCAs?
Carbamazepine
What are the drugs that increase plasma concentrations when used with TCAs?
Cimetidine
What are the drugs that increase the risk of hyponatraemia when used with TCAs?
Diuretics
Desmopressin
Carbamazepine
What are the drugs that increase risk of QT interval prolongation when used with TCAs?
Amiodarone Sotalol Antipsychotics Citalopram Escitalopram Loop diuretics B2 agonists Corticosteroids Theophylline
What are the drugs that increase the risk of hypotension when used with TCAs?
Alpha blockers Beta blockers ACEi CCBs Antipsychotics Levodopa/dopaminergic as NSAIDs SGLT2 inhibitor Diuretics Phosphodiesterase type 5 inhibitor
What are the drugs that increase antimuscarinic effects when used with TCAs?
Antimuscarinics
Antihistamines
Atropine
Antipsychotics
What are the drugs that increase the risk of serotonin syndrome when used with TCAs?
MAOIs/selegiline Tramadol Amfetamines 5HT1a agonists (sumatriptan) Ondansetron Lithium
What is the mechanism of action of the MAOIs?
Blocks monoamine oxidase enzymes which leads to accumulation of monoamines - DA, NA, 5HT
What are the MAOIs used for?
Rarely used due to significant food/drug interactions
What are the irreversible MAO-A and MAO-B inhibitors?
Phenelzine
Isocarboxazid
Tranylcypromine
Which MAOIs have a high risk of hepatotoxicity?
Phenelzine
Isocarboxazid
Which MAOI has the greatest stimulant action?
Tranylcypromine
What are the reversible MAO-A inhibitors?
Moclobemide
What are the side effects of MAOIs?
Hepatotoxicity
Postural hypotension/hypertensive responses
Hypertensive crises
What are the interactions with MAOIs that cause hypertensive crises?
Pseudoephedrine Adrenaline Noradrenaline Levodopa DRAs MAO-B inhibitors TCAs
What are the counselling points for MAOIs?
Avoid food containing tyramine - cheese, marmite, cured meat
Eat only fresh food
Avoid alcohol
Interactions 2 weeks after stopping an irreversible MAOIs
What are the negative symptoms of schizophrenia?
Under activity in mesocorticol pathway
Social withdrawal
Poor hygiene
Apathy
Catatonia
What are the positive symptoms of schizophrenia?
Overactivity of mesolimbic pathway
Hallucinations
Delusions
Disorganised speech/thoughts
What are the extrapyrimidal symptoms of schizophrenia?
D2 antagonism in nigrostriatal pathway
Parkinsonism Tardive dyskinesia Akathisia Dystonia Dyskinesia
What are the hyperprolactinaemia symptoms of schizophrenia?
D2 antagonism in tuberofundibular pathway
Menstrual disturbances
Galactorrhoea
Breast enlargement
Sexual dysfunction
Is the dose of antipsychotics higher or lower in the BNF compared to the Royal college of psychiatrists?
Lower
What needs to be considered in antipsychotic prescribing?
Consider alternatives
Be aware of risk factors
Drug interactions
ECG
Increase dose slowly and once weekly
Regular pulse, blood pressure and temperature checks
High dose for limited period, stop if no improvement after 3 months
How do you administer antipsychotics in an emergency?
Via IM
IM dose lower than oral dose
Prescription should specify dose for each route
Review dose of antipsychotic at least daily
What needs to be considered when prescribing antipsychotics in the elderly?
In elderly patients with dementia there’s an increased risk of death and stroke
Susceptible to postural hypotension and hyper/hypothermia
Do not treat mild-moderate psychotic symptoms
Initial dose is half adult dose
Review regularly
What needs to be considered for prescribing antipsychotics in patients with learning disabilities?
If patient is not experiencing psychotic symptoms
Reduce dose or stop long term treatment
Review condition
Refer to psychiatrist
Annual documentation of reasons for continuing antipsychotic
What is the mechanism of action of 1st generation antipsychotics?
Blocks post synaptic dopamine D2 receptors in the brain
What are the phenothiazines?
Group 1
Chlorpromazine
Levomepromazine
Promazine
Group 2
Pericyazine
Group 3 Fluphenazine Perphenazine Prochlorperazine Trifluoperazine
Which phenothiazines are the most sedative?
Group 1
Which phenothiazines have the least extrapyramidal symptoms?
Group 2
Which phenothiazines have the most extrapyramidal symptoms?
Group 3
What are the butyrophenones?
Haloperidol - high extrapyramidal symptoms and QT interval prolongation
What are the thioxanthenes?
Flupentixol - not in evening
Zuclopenthixol
What are the other 1st generation antipsychotics?
Pimozide
Sulpiride
Loxapine
What is the mechanism of action of the second generation antipsychotics?
Blocks post synaptic dopamine D1-D4 receptors and act on wide range of other receptors
What are the second generation antipsychotics?
Amisulpride Aripiprazole Clozapine Lurasidone Olanzapine Paliperidone Quetiapine Risperidone
Which second generation antipsychotics cause the most hyperprolactinaemia?
Amisulpride
Risperidone
Which second generation antipsychotics cause weight gain and diabetes?
Clozapine
Olanzapine
What is clozapine?
Second generation antipsychotic and is the most effective
What is clozapine used for?
Licensed for resistant schizophrenia
Try for at least 8-10 weeks, if symptoms don’t respond to optimised dose measure plasma levels before augmenting with second antipsychotic
What do you do for a missed dose of clozapine?
> 2 missed doses re-initiate by specialist
What are the interactions of clozapine that cause an increased risk of agranulocytosis (blood dyscrasias)?
Aminosalicylates
Immunosuppressants
What are the side effects of clozapine?
MAG
Myocarditis and cardiomyopathy- stop permanently
Agranulocytosis and neutropenia - report flu like illness
GI obstruction - constipation can be fatal
How often is clozapine monitored?
Leukocyte and differential blood count
Every 18 weeks, then every 2 weeks for a year, then monthly onwards
What is the MHRA warning for clozapine?
Reminder of potential,y fatal risk of intestinal, obstruction, faecal impaction, paralytic ileus
Report constipation before taking next dose
How often are antipsychotic depot preparations administered?
Every 1-4 weeks by IM injection
Test dose
Oral antipsychotic whilst stabilising
What is the safety information needed for antipsychotic depot preparations?
Do not confused with other preparations
IM haloperidol decanoate for maintenance
IM haloperidol rapid control
In patients with schizophrenia what needs to be monitored?
Physical health annually
What are the extrapyramidal symptoms associated with antipsychotics?
Parkinsonism Dystonia Dyskinesia Akathisia Tardive dyskinesia - stop at first sign of fine vermicular movements of tongue
Occurs most frequently with group 3 phenothiazines, butyrophenones, 1st generation depot preparations
What are the hyperprolactinaemia symptoms associated with risperidone, amisulpride and 1st generation antipsychotics?
Breast symptoms
Reduced bone mineral density
Menstrual irregularities
Sexual dysfunction
Aripirazole is the only antipsychotic without this side effect as it is a partial dopamine agonist
What monitoring is needed for hyperprolactinaemia in antipsychotics?
Prolactin levels at start, 6 months and then yearly
Endocrine function in children - weight, height, sexual maturation, menstrual function
What are the metabolic side effects more commonly associated with second generation antipsychotics?
Hyperglycaemia and sometimes diabetes - ciroq (clozapine, risperidone, olanzapine, quetiapine)
Weight gain
Lipid changes
What are the antipsychotics that most commonly cause sexual dysfunction?
Haloperidol
Risperidone
What is the mechanism of action of antipsychotics that cause hyperprolactinaemia and low libido?
Block D receptors
What is the mechanism of action of antipsychotics that cause arousal disorders?
Block M receptors
What is the mechanism of action of antipsychotics that cause erectile dysfunction and ejaculatory problems?
Block a1 receptors
What are the cardiovascular effects of antipsychotics?
Tachycardia
Arrhythmias
Hypotension
QT interval prolongation - pimozide, haloperidol
What antipsychotics are most likely to cause hypotension and interference with temperature regulation?
Elderly especially at risk of falls, hypothermia, hyperthermia
Clozapine
Chlorpromazine
Lurasidone
Quetiapine
Is neuroleptic malignant syndrome fatal?
Yes
Discontinue antipsychotic drug immediately
Bromocriptine or dantrolene
Lasts 5-7 days after stopping but longer with depot preparation
What are the other side effects of antipsychotics?
Antimuscarinic side effects Blood dyscrasias Photosensitivity Jaundice Sedation
What is the warning with chlorpromazine?
Contact sensitisation, avoid direct contact
What are the warnings for pimozide?
Prolongs QT interval, cases of sudden death
If QT interval prolonged stop or reduce dose
Do not give concomitant drugs that prolong QT interval
Do not give concomitant drugs that cause electrolyte imbalance
What are the side effects of phenothiazines?
Hepatotoxicity
Acute dystonic reactions
What is the monitoring needed for antipsychotics?
FBC Urea Electrolytes LFT Blood lipids Weight Fasting blood glucose ECG Blood pressure before starting and frequently during dose titration
What are the antipsychotic interactions that cause QT interval prolongation?
Amiodarone
Ciprofloxacin
Macrolides
Quinine SSRIs
What are the antipsychotic interactions that increase the risk of extrapyramidal symptoms?
Metoclopramide
Parkinson’s disease
What are the interactions with antipsychotics that increase the risk of sedation and CNS depressant effects?
Hypnotics
Benzodiazepines
Opioids
Antiepileptics
What are the interactions with antipsychotics that increase the risk of hypotension?
Antihypertensives
Diuretics
Nitrates
What are the interactions with antipsychotics that increase the risk of antimuscarinic effects?
TCA
Antihistamines
Antimuscarinics