Psychiatry - Management + Pharmacology Flashcards
a) Therapeutic plasma range of Lithium
b) aim in people being prescribed lithium for the first time
ac) im in people who had a relapse in the past while taking lithium or are taking lithium and have subthreshold symptoms with functional impairment
a) 0.6-1.0 mmol/L
b) 0.6-0.8mmol/L
c) 0.8-1.0mmol/L
At which lithium levels do patients start experiencing the symptoms of lithium toxicity
> 1.2mmol/L
How often does lithium need monitoring?
When are lithium levels measured?
o 1 week after starting lithium o 1 week after every dose change o Weekly until levels are stable o Every 3 months for the first year o After first year measure every 6 months
o After first year measure every 3 months in
Older people
People taking drugs that interact with lithium
People at risk of impaired renal/thyroid function/ raised ca levels
People with poor symptom control, poor adherence
People whose last plasma lithium level was >0.8mmol/L
Levels taken 12h post dose
Why should pregnant women//women planning a pregnancy not take lithium?
Can cause Ebstein’s anomaly in the foetus (tricuspid valve defect)
Lithium toxicity
Level
Signs
Triggers
Management
- Levels >1.2 mmol/L
- Life-threatening
• Symptoms: o GI disturbance – Diarrhoea, N+V o Polyuria/Polydipsia o Sluggishness o Giddiness o Drowsiness o Ataxia o Slurred speech o Gross tremor o Fits o Renal failure https://www.google.com/search?q=lithium+toxicity&source=lnms&tbm=isch&sa=X&sqi=2&ved=2ahUKEwjxz5uA3eT1AhUnzYUKHTQkDQ8Q_AUoAXoECAEQAw&biw=1422&bih=578&dpr=1.35#imgrc=_HloQrnAfNBQKM
• Triggers:
o Electrolyte changes due to low-salt diets, dehydration, D+V
o Drugs interfering with lithium excretion e.g. NSAIDs, thiazide diuretics, ACEi
o Overdose
• Management
o Check lithium level
o Stop lithium
!stopping lithium abruptly can ppt symptoms of mania/depression
o Transfer for medical care – rehydration, osmotic diuresis
o If overdose is severe, patient may need gastric lavage or dialysis
Adverse effects of lithium
Mild tremor Fatigue GI upset N+V Polyuria/polydypsia - diabetes inspidus Weight gain Swollen ankles
Hypothyroidism
Hyperparathyroidism
Teratogenicity (Ebstein’s anomaly –> tricuspid valve defect)
Which parameters need monitoring during treatment with lithium?
Why?
How often?
U+Es incl Ca
eGFR
TFTs
FBC
risk of renal impairment (Diabetes insipidus) /hypothyroidism/hyperparatyroidism
At the start + every 6 months
especially important to monitor renal and thyroid function! (U+Es +TFTs every 6 months!)
Bipolar disorder in the longer term (secondary care) mx
• Mood stabilizers are the mainstay
Lithium is the mood stabiliser of choice
Alternative: sodium valproate (given as sodium valproate because of reduced side effects)
• Psychological intervention e.g. CBT
• Lithium (first line) [mood stabilizer]
o If lithium is ineffective, add valproate
o If lithium is poorly tolerated or not suitable
Valproate or olanzapine instead
or
Quetiapine (If lithium effective during an episode of mania or bipolar depression)
• other drugs may be added when symptoms arise or when facing stress that could precipitate relapse (e.g. antipsychotics or benzodiazepines)
Acute de novo mania mx
Stop antidepressant + start antipsychotic
• Stop exacerbating medications – antidepressants, steroids, DA agonists, drug of abuse
o Offer anti-psychotic regardless of whether anti-depressant has stopped
• monitor food and fluid intake to prevent dehydration
• Second generation antipsychotics (SGA)
or mood stabilizer
or mood stabilizer + SGA for severe symptoms/poor response
• If treatment free –> Antipsychotics - First-line in previously untreated (rapid anti-manic effects)
o Haloperidol, Olanzapine, Quetiapine, Risperidone
o Do not offer lamotrigine
o Aripiprazole in moderate to severe manic episodes in adolescents aged 13 or older with bipolar I disorder for up to 12 weeks
• If already on treatment o Optimise medication o Check compliance o Adjust doses o Consider adding another agent e.g. antipsychotic + mood stabilizer
• Patients already on lithium
o Check plasma lithium levels to optimize treatment
o Consider adding an antipsychotic
• Adjunctive benzodiazepine
o Short term (<2 weeks) to prevent dependence!
o Clonazepam, lorazepam
o To treat agitation + insomnia
If first antipsychotic doesn’t work –> offer a different antipsychotic from the list
If second antipsychotic doesn’t work —> lithium + anti-psychotic
If lithium doesn’t work/ not suitable –> valproate + anti-psychotic
Valproate should not be given during pregnancy (fetal malformations and adverse neurodevelopmental outcomes, spina bifida)
• ECT if life-threatening overactivity and exhaustion despite medication or if unresponsive to medication
Acute manic relapse in a known bipolar patient
• Increase dose of mood stabilizer
o Lithium – check lithium levels, optimise plasma levels, consider establishing a higher serum level if good compliance
• Anti-psychotic augmentation
o Add haloperidol, Olanzapine, Quetiapine, Risperidone to lithium
o Can also be done for patients on valproate
• Antipsychotic for psychosis
o For psychosis during a manic/mixed episode that is not congruent with severe affective symptoms
• ECT
o Severely ill manic patients with life-threatening severity e.g. exhaustion
o Treatment resistant mania
o Severe mania during pregnancy
Why should valproate not be given during pregnancy/in young women of childbearing age?
Fetal malformations
Adverse neurodevelopmental outcomes
Spina bifida
Bipolar depression (secondary care) mx
• Psychological intervention (CBT, ITP, behavioural couples therapy)
• Moderate or severe bipolar depression
o Fluoxetine + olanzapine
o Or Quetiapine on its own
o If no response to fluoxetine + olanzapine or quetiapine on its own, consider lamotrigine on its own
o If the person is already on lithium
Check + optimize lithium plasma level
If lithium is at maximum level – add fluoxetine + olanzapine or quetiapine on its own
If no response to fluoxetine + olanzapine or quetiapine on its own, consider adding only lamotrigine to lithium
o If a person is already on valproate
Increase dose of valproate within the therapeutic range
If maximum tolerated dose or dose at top of therapeutic range –> valproate + fluoxetine + olanzapine or valproate + quetiapine
https://www.nice.org.uk/guidance/cg185/chapter/1-Recommendations
Adverse effects of valproate
Tremor Fatigue Gi upset Nausea Peripheral oedema Weight gain Hair loss (with curly regrowth)
Liver failure
Pancreatitis
Teratogenicity (spina bifida)
Which parameters need monitoring during treatment with valproate?
Why?
How often?
• Carry out FBC, LFTs
o Stop valproate immediately if abnormal liver function or blood dyscrasia is detected
o Valproate can cause liver failure
o Measure at the start and again after 6 months of treatment, repeat annually
How often does valproate need monitoring?
Why?
No need to monitor plasma levels (no agreed therapeutic range dose-related toxicity is not usually an issue)
in BPAD and mania what is valproate used for?
Valproate is an anti-convulsant
It treats acute mania and provides prophylaxis in BPAD
What are the adverse effects of lamotrigine?
What should the patient be on the lookout for?
Rashes (potentially life-threatening) Insomnia Headache Dizziness Tiredness Nausea
• Tell doctor immediately if they develop rash while dose of lamotrigine is being increased (think Stevens-Johnson syndrome)
Steven Johnson syndrome - carefully titrate dose when starting/stopping to avoid this syndrome:
Flu-like symptoms
Rash
Blistering mucous membranes
List some mood stabilizers (4)
Which of these are anti-convulsants?
Lithium
Valproate (anticonvulsant)
Carbamazepine (anticonvulsant) - second line
Lamotrigine (anticonvulsant) - second line
What are the adverse effects of carbamazepine?
Nausea
Headache
Dizziness
Drowsiness
Diplopoia
Ataxia
Leucopenia
Agranulocytosis
Rash
Teratogenicity
Toxic at high doses
Monitor levels closely
Check drug interactions before prescribing –> induces liver enzymes that metabolise many drugs, including itself
Relapse prevention strategies in BPAD
what might be the indicators of relapse in BPAD?
o Daily routine o Sleep hygiene o Healthy lifestyle o Limiting excessive stimulation/stress o Addressing substance misuse o Medication changes
Indicators of relapse in BPAD:
Insomnia
Increased energy
Which parameters are really important to monitor during treatment with lithium?
Why?
How often?
especially important to monitor renal and thyroid function! (U+Es +TFTs every 6 months!)
risk of renal impairment/hypothyroidism
At the start + every 6 months
2 things to monitor before starting carbamazepine and while the patient is on carbamazepine
why
- Induces liver enzymes – check for drug interactions before prescribing
- Can cause toxicity at high doses – Close monitoring of carbamazepine levels is essential
Where is lamotrigine used in the context of BPAD?
Second line prophylaxis in BPAD II
Treating depression in BPAD
• Depression in BPAD can be difficult to treat – antidepressants can switch depression to mania
• Antidepressants ONLY prescribed with a mood stabilizer or antipsychotic
o 1st line: fluoxetine (antidepressant of choice) + olanzapine OR quetiapine (on its own)
o 2nd line: lamotrigine
• Talking therapies
• Monitor patient for signs of mania
o Immediately stop antidepressants if signs are present
• Medication can be cautiously withdrawn if the patient is symptom-free for a sustained period
List examples of psychological treatment in BPAD
• CBT
o Identify relapse indicators
o relapse prevention strategies
o help patients to test out their excessively positive thoughts to gain a sense of perspective
• Psychodynamic psychotherapy
o Useful if mood stabilised
Social interventions in BPAD
- Family support and therapy
- Aiding return to education or work
- Interpersonal and social rhythm therapy (IPSRT) – incorporates aspects of IPT for depression with attention to circadian rhythms
• Primary care referral
o Symptoms of hypomania
o Symptoms of mania or severe depression
• Primary care referral
o Symptoms of hypomania – routine referral to CMHT
o Symptoms of mania or severe depression – urgent referral to CMHT
Depression - the stepped care model
Step 1
Step 1: All known and suspected presentations of depression
Assessment Support Psychoeducation Active monitoring Referral for further assessment and interventions
Depression - the stepped care model
Step 2
Step 2: Persistent subthreshold depressive symptoms, mild to moderate depression
Low-intensity psychosocial interventions
Psychological interventions
Medication
Referral for further assessment and interventions
Depression - the stepped care model
Step 3
Step 3: Persistent subthreshold depressive symptoms or mild to moderate depression with inadequate response to initial interventions; moderate to severe depression
High-intensity psychological interventions
Medication
Combined treatments
Collaborative care*
Referral for further assessment and interventions
• Collaborative care = only for depression where the person has a chronic physical heath problem and associated functional impairment
Depression - the stepped care model
Step 4
Step 4: Severe and complex depression; risk to life; severe self-neglect
High-intensity psychological interventions Medication Combined treatments ECT Crisis service Multiprofessional and inpatient care
Mild to moderate depression or subthreshold depressive symptoms mz
o Active monitoring, asses again normally within 2 weeks
o Sleep hygiene
o Low intensity psychosocial intervention
Individual-guided self-help based on principles of CBT
Computerised CBT
Structured group physical activity programme
Relaxation therapy
o Group CBT - if low-intensity psychological intervention is declined
o Do not use anti-depressants routinely to treat persistent subthreshold depressive symptoms or mild depression but consider them for people with:
A past hx of moderate or severe depression
Initial presentation of subthreshold depressive symptoms that have been present for a long period (typically at least 2 years)
Subthreshold depressive symptoms or mild depression that persists after other interventions
Depression management
a) Moderate-to-severe
b) or persistent subthreshold depressive symptoms (usually >2 years) or mild to moderate depression with inadequate response to initial interventions (low intensity psychosocial intervention) mx
a) combination of anti-depressant medication and a high-intensity psychosocial intervention (CBT or IPT)
b) Antidepressant medication (normally SSRI) or High intensity psychological treatment (CBT, IPT, behavioural activation, behavioural couples therapy)
Antidepressants - 1st line --> SSRI High intensity psychosocial intervention Individual CBT (16-20 sessions over 3-4 months) Interpersonal therapy (16-20 sessions over 3-4 months)
o ECT – fast + short-term improvement of severe symptoms after all other treatment options have failed or when the situation is life-threatening
Complex and severe depression mx
o Crisis resolution + home treatment teams to manage crises
o Develop a crisis plan that identified potential triggers and strategies to manage triggers – share with GP and any other people involved in the patient’s care
o Consider inpatient treatment if significant risk of suicide, self-harm or self-neglect
o Consider ECT for acute treatment of severe depression + when rapid response is required
Severe depression with psychosis mx
o Add an antipsychotic o Antipsychotics (aripiprazole, olanzapine, quetiapine, risperidone)
Augmentation of an antidepressant with buspirone, carbamazepine, lamotrigine, valproate should not be used routinely - insufficient evidence for their use
Treatment resistant/Refractory depression
o Review medication concordance + diagnosis – Check medication adherence, side effects, carefully titrate to an effective dose o Consider a higher dose, different medication (initially switch often to alternative SSRI), different class of antidepressants (e.g. Mirtazapine, Venlafaixine, TCAs, MAOIs)
o Augmentation strategies (adding something to the antidepressant)
Lithium
Second-generation antipsychotics (SGAs) – lower doses than for psychosis
Combining 2 anti-depressants e.g. Mirtazapine + SSRI (greater risk of hyponatraemia, serotonin syndrome etc)
ECT
Buspirone – anxiolytic drug that acts on 5HT1a (no antidepressant action alone but may have a synergistic effect when combined with SSRIs)
Drug to try in depression if there are co-existing chronic physical health problems + why
o Sertaraline preferred (lower risk of drug interactions)
o Can rarely cause hypoglycaemia
Over how long should anti-depressants be stopped and why?
Stopping anti-depressants should be done over a period of 4 weeks to prevent discontinuation symptoms
Discontinuation syndrome: GI sx Flu like sx Sweating Restlessness Problems sleeping Vivid dreams Unsteadiness Tinnitus Altered sensations (electric shock sensations in the head) Altered feelings (irritability, anxiety, confusion)
What can antidepressants be augmented with?
• Antidepressants can be combined/augmented with
o Lithium (mood stabilizer)
o Antipsychotics (aripiprazole, olanzapine, quetiapine, risperidone)
o Antidepressants (mirtazapine, mianserin)
o Benzodiazepines
Augmentation of an antidepressant with buspirone, carbamazepine, lamotrigine, valproate should not be used routinely insufficient evidence for their use
Augmentation of an antidepressant with a benzodiazepine for more than 2 weeks should not be used routinely risk of dependence))
Discontinuation syndrome sx
GI sx Flu like sx Sweating Restlessness Problems sleeping Vivid dreams Unsteadiness Altered sensations (electric shock sensations in the head) Altered feelings (irritability, anxiety, confusion)
Serotonin syndrome sx
o Potentially fatal o Restlessness o Sweating o Myoclonus o Confusion o Fits
What is light therapy being used for?
Seasonal Affective/Depressive disorder (SAD) that occurs in autumn/winter
Typical symptoms of SAD: Hypersomnia and hyperphagia
Bio-psycho-social approach for depression
Biological interventions
Psychological interventions
Social interventions
Biological - anti-depressants, ECT, rTMS, light therapy, exercise
Psychological - psychosocial interventions e.g. CBT, psychodynamic psychotherapy, ITP, MBCT
Social interventions - sleep hygiene, exercise, healthy diet, psychoeducation, support groups, social network support
Give examples of SSRIs (selective serotonin reuptake inhibitors)
Citalopram Escitalopram Fluoxetine Fluvoxamine Paroxetine Sertraline
Fluoxetine, fluvoxamine, paroxetine - associated with a higher propensity for drug interactions than other SSRIs
Paroxetine - associated with a higher propensity for drug interactions than other SSRIs (very short half life, 24h)
Give examples of SNRIs (Serotonin and NA reuptake inhibitors)
Venlafaxine
Duloxetine
Give examples of tricyclic antidepressants (TCAs)
Amitriptyline Clomipramine Imipramine Lofepramine Nortriptyline
Give examples of MAOIs (monoamine oxidase inhibitors)
Phenelzine
Tranylcypromine
Moclobemide
Give examples of RIMAs (reversible inhibitors of monoamine oxidase A)
Moclobemide
Give examples of NASSAs (noradrenergic and specific serotonin antidepressant)
Mirtazapine
Give examples of SARI (serotonin antagonist and reuptake inhibitor)
Trazodone
Give examples of Melatonergics
Agomelatine
What might be an issue when taking Paroxetine?
Paroxetine is an SSRI
Has a very short half-life (24h) therefore delaying a tablet can cause discontinuation symptoms
What might be an issue when taking venlafaxine?
Avoid venlafaxine if risk of arrhythmia
Slowly withdraw venlafaxine - discontinuation symptoms are common due to its short half-life
What is an issue wtih TCAs?
Infrequently used due to cardiotoxicity - even small overdoses can be fatal
QT prolongation (torsades de points, VT, normal QT: 0.44ms-0.47ms, if QT>0.50ms - dangerous), ST elevation, AV block
except lofepramine
What is an issue with MAOIs?
Can precipitate a hypertensive crisis “the cheese reaction”
Therefore rarely used as tyramine rich foods can cause NA build-up and hypertensive crisis
Hypertensive crisis: Tachycardia Flushing Severe throbbing headache Pallor Stroke Death
What is a side effect of moclobemide that patients should look out for?
Severe headache
Moclobemide is a RIMA
(reversible inhibitor of monoamine oxidase A)
Hypertensive crisis still possible therefore avoid tyramine-rich foods and report severe headache immediately
What is a side effect of Trazodone that patients should look out for?
Attend hospital if priapism
Trazodone is a SARI
(serotonin antagonist and reuptake inhibitor)
What needs to be monitored during treatment with agomelatine?
Monitor LFTs early in treatment
Can stop abruptly without discontinuation symptoms
SE of SSRIs
N+V Dyspepsia, diarrhoea, constipation (effect bc of serotonin receptors in the gut) Anxiety/Agitation Insomnia Vivid dreams advise to take it in the morning Tremor Headache Sweating Sexual dysfunction in about 70% of patients Hyponatraemia Suicidality Discontinuation syndrome
GI bleeding
Especially in older people or in people taking other drugs that have the potential to damage the GI mucosa or interfere with clotting
consider prescribing a gastroprotective drug in older people who are taking NSAIDs or aspirin
SE of SNRIs
Same as SSRIs N+V Dyspepsia, diarrhoea Anxiety/Agitation Insomnia Vivid dreams Tremor Headache Sweating Sexual dysfunction
GI bleeding
Hyponatraemia
Suicidality
Discontinuation syndrome
PLUS
Constipation HTN Raised cholesterol Dry mouth Dizziness Drowsiness
SE of TCAs
Anticholinergic side effects
Dry mouth Blurred vision Constipation Urinary retention Arrhythmia Postural hypotension Sedation Sexual dysfunction
Weight gain
Cardiotoxicity QT prolongation (torsades de points, VT, normal QT: 0.44ms-0.47ms, if QT>0.50ms - dangerous), ST elevation, AV block
lethal in overdose - cardiac monitor the patient
potential for postural hypotension and arrhythmias
except lofepramine
Rare side effects include: Urinary retention Convulsions Cardiac dysrhythmias Weight gain Precipitation of glaucoma Hyponatremia Hepatic impairment
SE of MAOIs
Hypertensive crisis - cheese reaction: Tachycardia Flushing Severe throbbing headache Pallor Stroke Death
Nausea Drowsiness Postural hypotension Insomnia Sexual dysfunction
SE of RIMAs
Nausea Agitation/anxiety Sleep disturbance Throbbing headache Sexual dysfunction
*Hypertensive crisis (cheese reaction) still possible - avoid tyramine-rich foods, report severe headache immediately: Tachycardia Flushing Severe throbbing headache Pallor Stroke Death
SE of NASSAs
Sedation Increased Appetite/weight gain Oedema Dry mouth Headache Dizziness
Sexual side effects relatively uncommon
SE of SARIs
Sedation Dizziness, postural hypotension Headache Tachycardia Nausea/Vomiting Tremor
Priapism
Sexual dysfunction
*Attend hospital if priapism
Good sedative effect and used in older adults
SE of melatonergics/melatonin agonist and serotonin antagonist
Nausea Dizziness Headache/migraine Insomnia Drowsiness
Hepatotoxicity
Give an example of a serotonin modulator and stimulator
List its SE
Vortioxetine
Good SE profile
GI SE
dizziness
skin reactions
Give an example of a NA and DA reuptake inhibitor
What is it used for in the UK?
Bupropion
Licensed for smoking cessation in the UK
When to review
People started on antidepressants who are not considered to be at increased risk of suicide
Person with depression started on antidepressants who is considered to present an increased risk of suicide and <30
• For people started on antidepressants who are not considered to be at increased risk of suicide
o See them after 2 weeks
o Regularly thereafter e.g. at intervals of 2-4 weeks in the first 3 months
o At longer intervals if response is good
• Person with depression started on antidepressants who is considered to present an increased risk of suicide and <30 seen after 1 week and frequently thereafter
• Careful when switching
o From fluoxetine/paroxetine to TCA
o From fluoxetine to other anti-depressants
o From a non-reversible MAOI
o To a new serotoninergic antidepressant or MAOI
• Careful when switching
o From fluoxetine/paroxetine to TCA
Both of these drugs inhibit the metabolism of TCAs
Lower starting dose of TCA required, particularly if switching from fluoxetine because of its long half-life
o From fluoxetine to other anti-depressants
Fluoxetine has a long half-life
o From a non-reversible MAOI – 2 week washout period required, do not prescribe other antidepressants
o To a new serotoninergic antidepressant or MAOI – risk of serotonin syndrome
Duration of treatment with SSRIs
Once well, recommended at the same dose for 6-12 months and for 2 years for those at greatest risk of relapse e.g. multiple recent episodes or significant hx
Which one is the only anti-depressive licensed for children?
Which class does it belong to?
Fluoxetine
SSRis
reversible vs irreversible MAOis
Irreversable - phenelzine, tranylcypromine, isocarboxazid
reversible - moclobemide
Which antidepressants…?
a) cause bleeding
b) interact with drugs
c) easily cause discontinuation symptoms
d) can be lethal in overdose
e) likely to be stopped due to side-effects
f) need BP monitoring needed
g) Worse hypertension
h) can cause postural hypotension and arrhythmia
a)SSRI o Bleeding (esp in elderly, gastric ulcers, hyponatraemia) – NSAIDs should be given with PPI
b) Drug interaction – fluoxetine, fluvoxamine, paroxetine
c) Discontinuation symptoms – paroxetine
d) Death from overdose – venlafaxine, TCAs except lofepramine
e) Stopping treatment due to side-effects – venlafaxine, duloxetine, TCAs
f) BP monitoring needed – venlafaxine
g) Worsening hypertension – venlafaxine, duloxetine
h) Postural hypotension and arrhythmia – TCAs
Mx of serotonin syndrome
o Severe cases managed in hospital
o Stop offending meds
o Supportive measures (ABCDE) – airway management, renal care, IVF, temp control (paracetamol)
o ?Cyproheptadine – antihistamine + serotonin antagonist
Duration of treatment for depression after remission as per NICE guidelines (capsule case)
A first episode of depression should be treated for a minimum of 6 months after remission per NICE.
There are suggestions that older patients may benefit from a minimum of 1 year’s treatment.
A 2nd episode of depression should be treated for at least 2 years following remission.
When do you usually start to see a response in anti-depressants?
When do you decide if an anti-depressant is not effective?
Response to antidepressant treatments is usually seen within 2-4 weeks.
At least 4 weeks at an effective dose is needed before deciding that the patient has failed to respond.
Amitriptyline contraindications
• Contraindications to the presribing of amitryptyline
o Known allergy
o Immediately post MI
o Cardiac arrhythmias
o Complete heart block
o (acute porphyria is not a contraindication but note that amitriptyline is metabolised in the liver and can therefore precipitate an acute crisis in those with porphyria)
Comment on
- Alcohol + amitriptyline
- MOAIs + amitriptyline
- Amitriptyline + convulsant threshold in epileptics
- Amitriptyline + cardiovascular health during GA
- Amitriptyline + combination with a beta blocker
- Amitriptyline + its effect on INR in patients taking concurrent warfarin
- Combining TCAs + SSRIs with MAOIs
- Alcohol increases the sedative effect of amitriptyline
- MOAIs exacerbate all the actions of amitriptyline
- Amitriptyline lowers the convulsant threshold in epileptics
- Amitriptyline increases the risks of hypotension and ventricular arrhythmias during GA
- Amitriptyline increases the risk of ventricular arrhythmias when combined with a beta blocker
- Amitriptyline has an unpredictable effect on the INR in patients taking concurrent warfarin
- TCAs + SSRIs should never be combined with MAOIs high risk of serotonin syndrome
2 important Long term side effects of lithium therapy
other side effects
Long term side effects of lithium therapy
• Hypothyroidism
• Irreversible nephrogenic Diabetes Insipidus
• Other SE: Hyperglycaemia, ?hyperthyroidism, hyperparathyroidism