Depression Flashcards
How is less severe depression managed?
As well as drug treatment, what else should patients with more severe depression be treated with?
Psychological therapy (CBT)
Should antidepressants be used routinely for mild depression?
No, psychological treatment should be considered initially
(However, can consider a trial if patient preference, have a hx of moderate-severe depression, refractory to CBT or if associated with psychosocial or medical problems)
How is severe depression managed?
What are the three major classes of antidepressants?
- TCAs
- SSRIs
- MAOIs
Little difference in efficacy, make choice based on patient requirements
How long can it take for antidepressant action to take place after starting drug treatment? What may be required in interim in severe depression?
2 weeks
Electroconvulsive treatment may be required in severe depression during this time
Which class of antidepressants are better tolerated and safer in overdose than the others?
SSRIs
They should be considered as first line
TCAs have similar efficacy to SSRIs so why are they more likely to be discontinued?
- Less tolerable side effects
2. Toxicity in overdose
Which 3 effects do SSRIs have less of compared with TCAs?
- Less sedation
- Less antimuscarinic effects
- Less cardiotoxic
Which class of antidepressants has dangerous interactions with foods and drugs, should be reserved for use by specialists?
MAOIs
Which popular natural remedy for depression should NOT be prescribed or recommended for depression?
St John’s Wort
Enzyme inducer and different preparations have different amounts of the active ingredient
What effect does St John’s Wort have on metabolising enzymes?
Enzyme INDUCER
How often should patients be reviewed at the start of antidepressant treatment?
Every 1-2 weeks
How long should treatment be continued before considering whether to switch due to lack of efficacy?
What about in the elderly or partial response?
4 weeks
6 weeks in the elderly
Partial response - continue for a further 2-4 weeks
Following remission, how long should antidepressant treatment be continued for at least?
What about in elderly/generalised anxiety disorder?
6 months at the same dose
12 months in elderly and at least 12 months in people receiving treatment for GAD
How long should patients with a history of recurrent depression, severe functional impairment, health/social problems or incomplete response receive maintenance treatment for?
At least 2 years
Also consider referral for psychological treatments to prevent relapse (group CBT or MBCT)
Continuation of antidepressants or psychological therapies after full or partial remission may reduce patient’s risk of relapse.
True or False?
True
Which electrolyte effect has been associated with all classes of antidepressant, especially SSRIs?
Hyponatreamia (usually in elderly)
If a patient on antidepressants (especially SSRIs) presents with drowsiness, confusion, or convulsions, what should be considered?
Hyponatreamia
What is there a particular risk of at the beginning of treatment or if a dose is changed?
Suicidal thoughts and behaviour
Children and young adults (18-25) most at risk
What is serotonin syndrome?
A relatively uncommon adverse drug reaction caused by excessive serotonergic activity
Symptoms can be mild or life threatening and develop within hours or days
When is serotonin syndrome most likely to occur?
- Initiation of treatment
- Dose increase
- Overdose
- Addition of new serotonergic drug
- Replacement of one serotonergic drug without allowing a long enough wash-out period between drugs (esp. if irreversible MAOI)
Severe toxicity usually occurs when a combination of serotonergic drugs is used - involving which particular drug?
MAOI
What are the main areas which symptoms of serotonin syndrome fall under?
Usually a symptom triad
- Neuromuscular hyperactivity
(tremor, rigidity, involuntary movement) - Autonomic dysfunction
(tachycardia, hyperthermia/sweating, shivering, blood pressure changes, diarrhoea) - Altered mental state
(Agitation, confusion, mania)
What are the neuromuscular hyperactivity symptoms of serotonin syndrome?
- Tremor
- Hyperreflexia (overresponsive reflexes)
- Clonus (involuntary and repetitive muscle contractions)
- Myoclonus (involuntary jerking)
- Rigidity
What are the autonomic dysfunction symptoms of serotonin syndrome?
- Blood pressure changes
- Hyperthermia
- Tachycardia
- Shivering
- Diarrhoea
What are the altered mental state symptoms of serotonin syndrome?
- Confusion
- Mania
- Agitation
What are the options if there is failure to respond to initial treatment with an SSRI?
- Increase the dose
- Different SSRI
- Mirtazapine (SNRI)
2nd line: Lofepramine, moclobemide, and reboxetine
Other TCAs and venlafaxine should be considered for more severe forms of depression
Which drugs can be considered for more severe forms of depression
- TCAs
2. Venlafaxine
Who can prescribe irreversible MAOIs?
Specialists only
What are the options is there is failure to respond to treatment with two antidepressants (each trialled for at least 4 weeks)?
Consider seeking specialist advice
- Adding another of a different class
- Using an augmenting agent (lithium, aripiprazole [unlicensed], olanzapine [unlicensed], quetiapine, or risperidone [unlicensed])
- Use Vortioxetine
Give some examples of augmenting agents used when antidepressant treatment fails with 2 drugs
LAROQ
- Lithium
- Aripiprazole
- Risperidone
- Olanzapine
- Quetiapine
Which 2 drugs are generally used to treat acute anxiety?
- Benzodiazepines
- Buspirone (if on CYP3A4 inhib reduce dose to 2.5mg BD) - contraindicated in epilepsy
How long does anxiety have to last for it to be considered chronic?
4 weeks
If anxiety lasts longer than 4 weeks, it is considered chronic. Which drugs may it be appropriate to start treatment with?
Antidepressants
Combined treatment with a benzodiazepine may be required until the antidepressant takes effect
Which drug class do duloxetine and venlafaxine fall under?
SNRI
What is first line for GAD?
SSRIs
Escitalopram, paroxetine, or sertraline [unlicensed]
After SSRIs, what can be used to treat GAD?
SNRIs
Duloxetine and venlafaxine
If a patient cannot tolerate SSRIs and SNRIs, what is used to treat GAD?
Pregabalin - licensed
What is first line for panic disorder, PTSD, social anxiety and OCD?
SSRIs
What MAOI is licensed for treatment of social anxiety disorder?
Moclobemide
Which two groups can TCAs be roughly divided into?
- Sedating
- Less-sedating
TCAs which call into which group will benefit agitated and anxious patients?
Sedating
Examples:
- Clomipramine
- Trazodone
- Amitriptyline and dosulepin - but dangerous in overdose so not recommended for depression
TCAs which call into which group will benefit apathetic patients?
Less-sedating
Examples:
- Imipramine
- Nortriptyline
- Lofepramine
Give examples of sedating TCAs
- Amitriptyline (dangerous in overdose, not recommended for depression)
- Clomipramine
- Trazadone
- Trimipramine
- Dosulepin (dangerous in overdose, specialist use)
- Doxepin
In most patients, long half life of TCAs allows for what?
Once daily administration
MR preparations unnecessary
At which time of day are TCAs usually administered?
At night
Apart from depression, TCAs can also be used in which conditions?
- Panic and anxiety disorders
- Nocturnal enuresis
- Neuralgia
Are TCAs recommended for treating depression in children?
No, studies have shown they are not effective
What are the dangers of MAOIs?
Interactions with drugs and food
Give 4 examples of MAOIs
- Tranylcypromine
- Phenelzine
- Isocarboxazid
- Moclobenide