Depression Flashcards
Goal of antidepressants
Target psychomotor and physiological changes e.g. loss of appetite and sleep disturbances
Improvement in sleep- usually first benefit of therapy
Used for moderate to severe depression, in addition to dysthymia (lower grade chronic depression)
ECT (electroconvulsive treatment)
Can be used in severe depression if 2 week onset of antidepressant therapy would may result in harm for the patient
First line for depression
SSRIs
Better tolerated
Safer in overdose
In patients with unstable angina or those who have had a recent MI- sertraline found to be safe
TCAs
Similar efficacy to SSRIs
More likely to be discontinued due to side effects: sedating, anti-muscarinic SE and cardiotoxic
Toxicity in overdose
MAOIs
Avoid tyramine-rich foods
How long to wait before considering switching antidepressant?
4 weeks (6 weeks in the elderly)
Following remission, how long should treatment be continued for?
At the same dose for at least 6 months (12 months in elderly)
If they have a history of recurrent depression, they should receive maintenance therapy for at least 2 years.
Hyponatraemia
Most common with SSRIs than with other antidepressants
Should be considered in all patients who develop drowsiness, confusion or convulsions while taking an antidepressant
Suicidal thoughts and behaviour
Children, young adults and those with a history of suicidal behaviour are particularly at risk
Symptoms of serotonin syndrome
NEUROMUSCULAR HYPERACTIVITY: tremor, hyperreflexia, clonus, myoclonus, rigidity
AUTONOMIC DYSFUNCTION: tachycardia, blood pressure changes, hyperthermia, shivering, diarrhoea
ALTERED MENTAL STATE: agitation, confusion, mania
Failure to respond
FTR to initial SSRI treatment- increase in dose, switch to a different SSRI or mirtazapine.
Other 2nd lines are lofepramine, moclobemide, reboxetine. Other TCAs and venlafaxine should only be considered in severe depression and MAOIs should only be initiated by specialists.
Management of acute anxiety
Benzodiazepine or busiprone hydrochloride
For chronic (longer than 4 weeks duration) may be suitable to use an antidepressant.
Treatment of Generalised Anxiety Disorder
SSRI- escitalopram, paroxetine
SNRI- Duloxetine, venlafaxine
If these are not tolerated, pregabalin can be considered.
Treating panic disorder, OCD, PTSD and phobic states such as social anxiety disorder
1st line- SSRIs
2nd line in panic disorder (unlicensed)- clomipramine hydrochloride or imipramine hydrochloride
Moclobemide- can be used in social anxiety disorder
Sedative tricyclic antidepressants
Amitriptyline Clomipramine Dosulepin Doxepin Mianserin Trazodone Trimipramine
Less sedative tricyclic antidepressants
Imipramine
Lofepramine
Nortriptyline
Lofepramine
Lowest incidence of side effects
Less dangerous in overdose
But hepatic toxicity
Imipramine
More antimuscarinic side effects than other TCAs
Most dangerous in overdose
Amitriptyline and dosulepin
Administration of TCAs
Long half life so only once at night administration is required