Psychiatry revision Flashcards
combination of symptoms for mild, moderate and severe depression
mild = 2 core + 2 additional mod = 2 core + 3 additional severe = 3 core + 4 other
how long does a manic episode last
1+ weeks
2 antipsychotics associated with the most weight gain
olanzapine
clozapine
3 symptoms of NMS
lead pipe rigidity
fever
dysphagia
which antipsychotic treats both the positive and negative symptoms of schizophrenia
clozapine
presentation of an oculogyric crisis
bilateral elevation of gaze (emergency)
1st line treatment of acute dystonia reaction
benzotropines
2nd line = benzodiazepam
screening of which other conditions in an anxiety history
OCD panic attacks depression ACS - pain OE, feeling sick, sweating hyperthyroidism
how long must symptoms of GAD last for
at least 6 months
when can OCD be diagnosed in relation to depression
ONLY if ruminations arise and persist in the absence of depressive episode
psychological treatments for OCD
CBT
ERP (exposure and response prevention)
drug treatments for OCD
SSRIs
TCA (clomipramine)
main treatment of PTSD
trauma focused CBT:
- repeated grade exposure
- testimony based techniques
- eye movement desensitisation and reprocessing (EMDR)
- antidepressants - paroxetine/mirtazepine
problems with TCAs
- high toxicity in overdose
- anticholinergic side effects
- sedation
- arrhythmias
2 major side effects of NaSSAs (e.g. mirtazapine)
sedative
weight gain
what to check before starting SNRIs (e.g. venlafaxine)
BP
ECG
don’t use is patient has CVS problems
common SSRI side-effects
- agitation
- nausea/loss of appetite
- indigestion, diarrhoea, constipation
- loss of libido
- dizziness
- dry mouth
- blurred vision
- sweating
- headaches
electrolyte problems with antidepressants
hyponatraemia (worst with SSRIs, best with lofepramine/mirtazapine)
complication of MAOIs
tyramine cheese reaction - hypertensive crisis
examples of MAOIs
Isocarboxazid (Marplan)
Phenelzine (Nardil)
Selegiline (Emsam)
Tranylcypromine (Parnate)
combinations of drugs which can cause serotonin syndrome
SSRIs + TCA / MAOIs / St John’s Wort / MDMA
which antidepressant might cause priapism
trazadone
how long should an antidepressant at least be used for
4-6 weeks before switched if not working
what might be added in with antidepressants to augment them
lithium
baseline investigations undertaken before commencing lithium
- physical and weight
- U&Es, renal function, TFTs, Calcium
- ECG
- pregnancy test
3 drugs to avoid with lithium
- ACEi
- NSAIDs
- diuretics especially thiazides
late side effects of lithium
- diabetes insipidus
- hypothyroidism
- arrhythmias
- ataxia
- dysarthria
- weight gain
what should happen before ECT is carried out
at least 2 types of treatment trialled
how long does CBT last for
16-20 sessions over 3-4 months
who must be present in a MHA assessment
2 doctors and 1 AMHP
one doctor must be section 12 approved
AMHP is independent and makes the final decision
what are under the 3 rights to treat of the MHA
- Cause of mental disorder: organic illness
- Mental disorder itself: ECT, psychotropic medications
- Direct consequences of mental disorder: Addiction, self-harm, neglect, overdose, feeding in eating disorder
how long does an emergency vs standard DoLs last
7 days vs 1 year
organ conditions common in Down’s syndrome
A/VSD
oesophageal atresia
6 other conditions associated with Down’s syndrome
cataracts hypothyroidism chest infections transient leukaemia epilepsy AD
leading preventable non-genetic cause of learning disability is
foetal alcohol syndrome (25-30% have learning disability)
most common inherited cause of learning disability
fragile X syndrome (CGG triplet repeat in FMR-1 gene)
2 domains of diagnostic criteria of autism spectrum disorder
- social interaction and communication
- repetitive behaviours
what should always be looked for in learning disabilities with depression
hypothyroidism - especially in Down’s syndrome
which genetic condition is associated with an increased risk of psychosis
DiGeorge syndrome (22q11.2 deletion)
mechanism of action of alcohol
GABA agonist (inhibitory neurotransmitter) and glutamate receptor antagonist = relaxation and disinhibition
what medication is used to reduce alcohol cravings
naltrexone
when might grand-mal seizures occur after last alcoholic drink
6-48 hours after
3 things making delirium tremens more likely
comorbid infection
liver disease
heavy dependence
symptoms of delirium tremens
- Clouding of consciousness
- Amnesia
- Pyscho-motor agitation
- Lilliputian hallucinations (people/animals-tiny)
- Marked fluctuations in consciousness- worse in evenings
- Raised temp
- Paranoia
what is mydriasis
dilation of pupils (side effect of MDMA)
what class are amphetamines
B, A if injected
what does a young person presenting to A&E with changes on ECG/chest pain and signs of MI indicate
potential cocaine use
what class are benzos
class C - binds to GABA and increases effect of GABA (agonist)
what scale is used in opiate withdrawal
COWS: clinical opiate withdrawal scale
signs of opiate withdrawal
- Sweating
- High resting pulse rate (80-120+)
- Restlessness
- Increased pupil size
- Bone and joint aches
- Runny nose
- GI upset
- Tremor
- Anxiety/irritability
- Gooseflesh skin
2 main drug treatments in opiate addiction
methadone buprenorphine (sublingual)
also can use lofexidine or naltrexone (which is used in alcohol withdrawal)
half life of methadone
24 hours - can be reduced to 8 in pregnancy
differential diagnoses for dementia in the elderly using DEMENTIA mnemonic
Drugs and delirium Emotions/depression Metabolic disorders Eye and ear impairment Nutritional disorders Tumours, toxins, trauma, thyroid Infections, Arteriosclerosis, alcohol
3 main domains of dementia
- disturbance of multiple higher cortical functions
- deterioration in judgement and thinking, processing of information, emotional control, social behaviour/motivation
- NO CLOUDING OF CONSCIOUSNESS
how long must symptoms be present for dementia diagnosis to be made
6 months +
organic conditions - differentials for dementia
- low B12, ferritin or folate
- abnormal endocrine functions (HYPOTHYROIDISM)
- electrolyte abnormalities - Ca2+
- chronic alcohol intake
3 acetylcholinesterase inhibitors for AD
rivastigmine
galantamine
donepezil
why are antipsychotics inappropriate for use in controlling BPSD of dementia
increase risk of stroke, CVD, Parkinsonism side effects, falls and death
which antipsychotic is the only one licensed for use in agitation in dementia
risperidone
3 subtypes of pronto-temporal dementia (FTD)
- behavioural-variant FTD
- progressive non-fluent aphasia
- semantic dementia (loss of long term memory of things which aren’t personal e.g. colours, numbers)
investigation of choice in FTD
MRI - FT atrophy can be seen
which medication should NOT be used in FT dementia
acetylcholinesterase inhibitors
some managements of FTD
- symptomatic
- psychosocial
- SSRIs???
3 core features of LBD
- fluctuating cognition
- spontaneous motor features of Parkinsonism (70%)
- 2/3 have visual hallucinations
other features include sleep REM disorder, systematised delusions, depressive episodes, recurrent falls/syncope/LOC
investigations for LBD
CT head = generalised atrophy
Spect (DaT scan)
what acetylcholinesterase inhibitor can help with LBD
rivastigmine
normal score of the MOCA is
above 25
CVS risks in starvation (AN)
bradycardia, hypotension, sudden death
CVS risks in binging/purging
arrhythmia, cardiac failure, sudden death
renal risks in both AN and BN
- oedema (more severe in BN)
- electrolyte abnormalities
- renal calculi
- renal failure
GI risks of AN
- constipation
- parotid swelling
- delayed gastric emptying
- nutritional hepatitis
thyroid risk in AN
hypothyroidism
haematological risks in AN and BN
- AN = anaemia, leucopenia, thrombocytopenia
- BN = leucopenia, lymphocytosis
ECG changes which might be found in AN
86% have changes such as:
- T wave changes due to hypokalaemia
- bradycardia (<40)
- QTC prolongation (>450)
4 electrolyte abnormalities in referring syndrome
hypophosphataemia
hypomagnesaemia
hypocalcaemia
hypokalaemia
electrolyte abnormalities in laxatives misuse
hyperkalaemia
hyponatraemia
vs vomiting which is hypokalaemia
physical risk index used in AN
PREDIX - physical risk in eating disorders index
along what guidelines is coordinated care for AN organised
MARZIPAN guidelines
1st and 2nd line treatments for BN
1st = CBT 2nd = fluoxetine 60mg
what should be done if an SSRI is ineffective
- dose escalation first
- then switch to different SSRI or alternative e.g. SNRI
(venlafaxine or duloxetine) - augmentation (lithium)
- combinations
what might antidepressants be augmented with
lithium/quetiapine
risperidone
aripiprazole
2 combinations of antidepressants which can be used
venlafaxine and mirtazapine
olanzapine and fluoxetine
antidepressants most likely to cause hyponatraemia and GI bleeds
SSRIs
antidepressants most likely to cause hypotension, tachycardia and QTc prolongation
SNRIs and NRIs
rare side effect of mirtazapine
agranulocytosis
what antipsychotic also has an antidepressant effect when given by mouth in small doses
flupenthixol
D2 antagonism effects
- Works on Mesolimbic pathway
- Reduces positive symptoms of schizophrenia - Mesocortical symptom
- Can worsen negative symptoms of schizophrenia - Nigrostrial pathway
- EPS, NMS, tardive dyskinesia - Tuberoinfundibular pathway
- hyperprolactinaemia, sexual dysfunction, weight gain
some side effects of antipsychotics due to blockage of M1 receptors
blocking cholinergic M1 receptors = constipation, blurred vision, dry mouth, drowsiness
side effects of antipsychotics due to blockage of H1 receptors
sedation and weight gain
when to assess if antipsychotics have worked after starting them
over 2-3 weeks - if some effect then continue for 4 weeks
which antipsychotics can change seizure threshold and cause QTc prolongation
all
pharmacological interactions between clozapine and carbamazepine
clozapine concentrations are REDUCED by carbamazepine
3 medications which can react with antipsychotics to increase QTc
ketoconazole
clarithromycin
erythromycin
3 main drugs which interact with lithium
NSAIDS
thiazide diuretics
ACEis
increases risk toxicity
valproate’s main use
mania (not as effective as lithium for BPAD)
safe plasma levels of valproate
50-100mg/L
treatment of catatonia
high dose benzos
then ECT
3 main uses of carbamazepine (enzyme inducer = lots of interactions)
anticonvulsant
trigeminal neuralgia
BPAD if unresponsive to lithium
safe plasma level of carbamazepine
4-12 mg/L
drugs which are not compatible with carbamazepine
clozapine (reduced conc) valproate paroxetine lorazepam furosemide lithium
what can furosemide cause with carbamazepine
hyponatraemia
contraindication to benzos
severe hepatic impairment
signs of lithium toxicity
D+V confusion, drowsiness blurred vision COARSE tremor seizures hypotension
4 situations which can lead to lithium toxicity
dehydration
excessive alcohol
NSAIDs
diuretics
medical treatment of psychosis related aggression
haloperidol (otherwise usually lorazepam)
what is accuphase
zuclopenthixol - v sedating so use on a patient who is constantly v aggressive
what can be used to counteract the EPSEs of antipsychotics
procyclizine (anticholinergic)
but DON’T use in TD - makes it worse
what can be used to treat akathisia (procyclizine doesn’t work)
benzos
symptoms of NMS (FEVER)
Fever Encephalopathy Vitals and BP unstable Enzymes elevated Rigidity of muscles
what is seen on bloods in NMS
elevated CK
how might NMS be treated
benzos
stopping meds
rapid cooling
bromocryptine (rarely)
how is serotonin syndrome treated
discontinue and supportive
cyproheptadine
4 side effects of clozapine
paralytic ileus and constipation
hypersalivation
agranulocytosis
myocarditis
what stops if patient stops taking clozapine
if >48 hours must be re-titrated from baseline
another name for anankastic personality disorder
OCD-like personality disorder
main antipsychotic which has acceptable use in the elderly
risperidone - up to 6 week course for aggressive/psychotic behaviour
what is folie a deux
shared psychotic disorder -
often dominant has primary delusion and dependent develops it
dominant needs formal treatment, dependent needs to be away from dominant for it to disappear
which antidepressant is contraindicated in AN
bupropion - lowers seizure threshold
how long is half life of lithium
24 hours
if SSRIs/SNRIs aren’t tolerated, what can be used got anxiety
pregabalin
what can be used to manage moderate-severe tardive dyskinesia
tetrabenazine
what can happen if using benzos in liver failure
hepatic encephalopathy
how must flumazenil (antidote for benzos) be administered
IM - as IV can irritate the veins
what can slate-grey cyanosis be a sign of
benzos OD
specific side effect of zopiclone
taste disturbance
specific side effect of zolpidem
GI upset
cautions and contraindications in AChesterase inhibitors
caution = COPD, asthma, PUD
contraindications = heart block and sick sinus syndrome
CORE DRUGS QUIZLET
side effects of AChesterase inhibitors
- Nausea, diarrhoea and vomiting: due to increased cholinergic activity in PNS
- Asthma, COPD- exacerbations
- Peptic ulcers, bleeding
- Bradycardia
- Central cholinergic effects: hallucinations, aggressive behaviour
Small risk of NMS/EPS
3 interactions of AChesterase inhibitors
- NSAIDs/steroids: increased risk of peptic ulcer
- Antipsychotics: increased risk of NMS
- B-blockers: can cause bradycardia/heart-block
caution to memantine
epilepsy - can lower seizure threshold
side effects of memantine
- loss of balance
- Constipation
- Dizziness
- Drowsiness, headache
- Dyspnoea
- Hypertension
what is concrete thinking
inability to understand abstract ideas/concepts - subjects focused on the here and now
what are ideas of reference
A delusional belief that innocuous events or coincidences are directly linked and have personal significance to the subject. Common clinical examples are subjects believing that the television or radio is talking about them / to them.
what is splitting
a primitive ego defense mechanism that places people in good/bad categories
For instance a person who is abused by some-one they love may split that person into a loving and an abusive person
5 pathological changes to the brain in Alzheimer’s disease
- Neurofibrillary tangles
- Amyloid deposits
- Neuronal loss/cortical atrophy
- Senile plaques
- Reduction in Acetylcholine synthesis
2 genetic risk factors for AD
- presence of 1 or more APOE-e4 alleles
- Down’s syndrome
other tests to carry out for AD
- B12/folate (SADC)
- CA2+ hypercalcaemia
- Chronic alcoholism
- Endocrine: HYPOTHYRODISM [TFT’s]
- MRI: space occupying lesion
what is subcortical dementia
Dementia caused by disease of small vessels deep in the brain- thought to be most common vascular dementia
Slowness of processing, depression, forgetfulness, impaired cognition, apathy
3 main pathophysiologies of vascular dementia
- Infarction: Ischaemic stroke
- Embolism, thrombosis, lacunar infarction…. - Leukoaraiosis: disease of white matter
- Haemorrhagic stroke
1st symptoms in VD
NOT usually memory loss, instead:
- Problems planning & organising/making decisions
- Difficulty doing things with number of steps: making cup of tea
- Slower speed of thought
- Problems concentrating
- Short periods of confusion
how is VD managed
Main goal is to prevent further strokes:
- Antiplatelets
- Carotidectomy in carotic stenosis
Improvement of cognitive symptoms:
- Cholinesterase inhibitors/mematine
Life-style changes:
- Lifestyle modification: regular exercise, weight and glycaemic control, smoking cessation
pathophysiology of DLB
Alpha-synuclein aggregates form Lewy-bodies which damage neurons in the brain
Lewy bodies contain the neurofilament ubiquitin
how is DLB diagnosed
Clinical diagnosis:
The diagnosis is Lewy body dementia when:
· Dementia symptoms consistent with Lewy body dementia develop first.
· When both dementia symptoms and movement symptoms are present at the time of diagnosis.
· When dementia symptoms appear within one year after movement symptoms.
side effects of giving antipsychotics in DLB
postural hypotension
NMD
3 side effects of AChesterase inhibitors
- N+V
- hyper salivation
- orthostatic hypotension
what is posterior cortical atrophy
Damage to the areas at back of the brain which help with sight and spatial awareness
- Problems reading and identifying obkects
- Struggle to judge distances
- Uncoordinated
what is logopenic aphasia
damage to left side of brain = problems with speech
what is HIV associated dementia
Condition which 30% of HIV patients developed:
- Movement disorders: tremor, myoclonus
- Depression, apathy
- Focal cognitive deficits: amnesia
SUBCORTICAL DEMENTIA
triad of symptoms of normal pressure hydrocephalus
Clinical symptoms due to build up of CSF:
- Abnormal gait
- Urinary incontinence
- Dementia
1st line medical management of delirium
haloperidol 0.5mg
2 drugs which can induce mania
- SSRIs
- prednisolone (steroids)
what is cyclothymia
The patient has at least two years of repeated hypomanic manifestations that do not meet the criteria for hypomanic episodes alternating with minor depressive episodes
screening tools for BAD
- PHQ-9 for depression screening
- Mood disorder Questionairre (MDQ) for mania screening
- Bipolarity index (score of over 60)
- Young mania rating scale
how long should a mood stabiliser be taken for BAD
after 1st episode - at least 2 years
at least 5 years if frequent episodes, psychotic episodes, substance misuse
treatments for GAD, panic disorder, social anxiety/phobia, agoraphobia
all CBT/SSRI
SSRI used in PTSD
paroxetine
5 criteria (of which 3 must be present) to diagnose anxiety
- Restlessness/anxiety
- Poor concentration
- Irritability
- Muscle tension
- Sleep disturbance
which medications can cause anxiety
- Asthma meds: Salbutamol, theophylline
- Corticosteroids
- BB’s
- Antidepressants
- some herbal medications
how long must obsessions or compulsions be present for OCD to be diagnosed
most days for period of at least 2 weeks
management of OCD
Psychological:
- CBT
- Exposure and repsponse therapy
Drug treatment:
- SSRI: sertraline, fluoxetine
- Clomipramine (TCA) 2nd line
negative symptoms of schizophrenia
- alogia (poverty of speech)
- avolition (lack of motivation)
- blunted affect
- anhedonia
- asociality
5 drugs which can induce psychosis
- Steroids
- L-DOPA
- Disulfiram
- Digitalis
- Anticholinergics
how is NMS treated
- stop the offending drug
- supportive care - IV fluids, balance the electrolytes, treat the rhabdomylosis, cooling blankets
- bromocriptine
- dantrolene
FEVER acronym for NMS
Fever, Encephalopathy, Vitals unstable, Elevated enzymes, Rigid muscles
what is schizotypal disorder
Personality disorder which is like a lighter version of schizophrenia
-They don’t experience true hallucinations/delusions, and are open to idea that their perceptions and ideas are distorted
2 subtypes of schizoaffective disorder
- bipolar type (younger patients)
- depressive type (older patients)
which symptoms are not included in delusional disorder and would instead point to schizophrenia
- Persistent, clear auditory hallucinations
- Delusions of control
- Marked blunting of affect
- Deterioration of personality
delusions must be present for 3+ months
what is De Clerambault’s syndrome
Also known as Erotomania- delusional belief that a famous person/higher social status is in love with them
- Convinced they communicate love by secret signs
what is Capgras syndrome
Belief that a spouse/friend/family member has been switched with indentical imposter/double
what is Fregoli’s syndrome
Belief that multiple people are actually the same person but in disguise
- Patient often believes they are being persecuted by that person
what is Cotard’s syndrome
Delusion of being dead/dying/rotting, or having lost parts of the body or organs
what is Ekbom’s syndrome
Delusional parasitosis:
- Patients claim they are infested with parasites with no evidence (only freckles/spots)
- Risk of self-harm trying to get rid of them
2 contraindications of SSRIs
- epilepsy
- PUD
SSRI with highest risk of suicide
paroxetine
side effect of citalopram
QTc prolongation (don’t give with antipsychotics)
what is often prescribed with SSRIs and an NSAID
PPI
3 contraindications for SNRIs (e.g. duloxetine, venlafaxine)
- conditions with high risk cardiac arrhythmia
- uncontrolled HTN
- hepatic impairment, severe renal impairment
cardiac side effects of SNRIs
- SVT
- torsade de pointes (QTc prolongation)
what do antifungals interact with
SNRIs
which TCA is used for OCD
clomipramine
receptors affected by TCAs (as well as blocking reuptake of serotonin and norepinephrine)
H2
D2
alpha 1 and 2
how is TCA overdose managed
IV sodium bicarbonate and supportive treatment
can you ever give MAOIs and TCAs together
no - increase level of 5HT and noradrenaline = serotonin syndrome
can MAOIs be used in pregnancy
no - increased risk of foetal malformations
which brain pathway do antipsychotics work on to target positive symptoms of schizophrenia
mesolimbic pathway
3 drugs you can never give to Parkinson’s patients
haloperidol
metoclopramide
chlorpromazine
which pathway do antipsychotics work on to cause EPSEs
nigrostriatial pathway
main group of drugs which antipsychotics interact with
drugs which prolong the QTc interval:
- macrolides
- amiodarone
- citalopram
antipsychotic with the strongest link with sexual dysfunction
risperidone
3 serious side effects of clozapine
- agranulocytosis
- neutropenia - leading to MYOCARDITIS
- paralytic ileus (constipation?!)
how are antipsychotics monitored
- lipids
- HbA1c
- FBC
- U&Es and LFTs
- weight and waist circumference
- ECG - for QTc prolongation
what happens if clozapine is stopped
if >48 hours - must re-titrate from the beginning
what can be used to treat the hypersalivation (from clozapine)
procyclizine (anticholinergic)
what do 1/3 of people on lithium develop
CKD
what is section 62 of the MHA
A treatment such as ECT can be given WITHOUT consent or 2nd opinion if:
- It is necessary to save a patient’s life
- Reversible, to save a patient’s condition
- Reversible and not hazardous to an to stop patient being a harm to self or others
what is congruent affect
appropriate mood for the situation
only contraindication for ECT
raised ICP
how can NMS be distinguished from serotonin syndrome
SS tends to have clonus of lower limbs
NMS has parkinsonism
treatments for NMS
1st line = dantrolene
2nd line = bromocryptine
3rd line = ECT
stop drug
rehydration and rapid cooling
2 antipsychotics which double the risk of stroke in older people
risperidone
olanzapine
what should be done if QTc is over 500m/s
stop meds immediately - call cardiology
triad of 3 most important things to consider when assessing suicide risk
- likelihood - have they made a plan
- immediacy - when
- impact - intent to be lethal or self harm
what syndrome can present as mania/psychosis
22q11 deletion syndrome - DiGeorge syndrome
pathophysiology of bipolare
deficiency of 5-HT in midbrain
in locus serilius there is more dopamine and noradrenaline - contributes to mania
which type of antidepressants shouldn’t be used in BAD (NB: never use antidepressants without a mood stabiliser in BAD)
SNRIs - increase noradrenaline as well = more mania
some medications used in hypomania
benzos - clonazepam, lorazepam
what is alexthymia
inability to verbally express emotions
what are pareidolia illusions
seeing shapes in objects e.g. seeing faces in the clouds
what are affect illusions
illusions based on current affect (feeling)
what are hypnogogic and hypnopompic hallucinations
- hypnogogic = occurring as body goes from being awake to asleep
- hypnopompic = occurring upon awakening