Depression Flashcards
Describe SSRI use for depression
- 1st line in uncomplicated px (physically healthy, outpatient, no CI)
- Citalopram = fewest DIs; sertraline is 2nd least
- All are about equally effective; choice of one over another depends on pt profile and drug profile
- If pt fails trial due to non-response or limiting adverse effect -> ensure adherence and maximize dose (try to wait 8 weeks until increasing)
- If pt experiences partial response -> consider adding 2nd antidepressant, lithium, or LT4 or switch agent
- If pt fails this -> switch agent
- Flat dose response (most px respond at lowest effective dose)
- Advantage -> less SE vs. TCAs b/c more selective
- AE = nausea, agitation, nervousness, restlessness, insomnia/ drowsiness
- Toxic effects -> tremor, sinus tachycardia, N/V/D, seizures, serotonin syndrome
What are the sx of SSRI withdrawal syndrome? When do they occur and how long do they last?
- *FINISH -> flu-like sx, insomnia, nausea, imbalance, sensory disturbance, hyperarousal
- Occur w/in 1-3 days (up to 1 week)
- Last up to 7-14 days (may be several weeks)
Describe venlafaxine
- Similar to SSRIs at low doses, but similar to TCAs at high doses
- AE = BP increases (dose dependent; risk greater w/ increased age), dose-related GI effects, dizziness, sexual dysfunction, dry mouth
Describe TCA use for depression
- Last option for most px
- Nortriptyline generally better tolerated than amitriptyline and clomipramine
- Has antihistaminic effects -> sedation, weight gain
- Has anticholinergic effects, so caution in BPH and glaucoma (desipramine has least ACh effects)
- At usual doses, cardiac effects -> hypertension, tachycardia, antiarrhythmic properties, orthostatic hypotension
- Toxic effects in overdose -> CV (sinus tachycardia, ventricular arrhythmias, hypotension), CNS (coma, delirium, seizures), urinary retention
- Withdrawal sx -> cholinergic & adrenergic rebound = dizziness, N/D, insomnia, hot or cold flashes
- If d/c, taper over 2-4 weeks
Describe bupropion use for depression
- Good option for those previously on venlafaxine who can’t tolerate AE
- AE = insomnia, agitation, anxiety, seizures (at high doses), dry mouth, N/V, rash, headache
- Advantages -> less sexual dysfunction and little weight gain
- CI = seizures, anorexia
Describe mirtazapine use for depression
- AE = orthostatic hypotension (not great for elderly); can be fairly sedating
- Advantages -> little sexual dysfunction and less serotonergic effects (so little weight gain)
Describe MAOI use for depression
- Indicated for atypical or resistant depression
- Only antidepressant that requires washout when switching
- AE = orthostatic hypotension, dry mouth, constipation, sexual side effects, insomnia
- Dosed in AM and mid-day to avoid overstimulation
Which antidepressants can be used in combination?
- Venlafaxine + bupropion
- SSRI + bupropion
- SSRI + TCA
What is the typical tx duration for antidepressants?
- 4-9 months after remission
- Lifelong if < 40 y/o and 2+ episodes OR any age & 3+ episodes
Sx and tx of serotonin syndrome
- *Diagnosis of exclusion
- Cognitive/behavioural = agitation, mental status changes (confusion, hypomania)
- Autonomic = diarrhea, fever, shivering
- Neuromuscular = incoordination tremor, myoclonus, hyperreflexia
- Tx = supportive care, BZD for neuromuscular sx, tylenol for fever, cyproheptadine 4 mg q4h for severe sx
Depression in pregnancy
- Weigh risks vs. benefits to mother and fetus!!
- Most evidence for safety of fluoxetine
- Can do ECT and psychotherapy (CBT)
- After delivery, watch for direct drug effects and transient withdrawal sx in infant
Depression in breastfeeding
- Safe = paroxetine, sertraline*, fluoxetine, nortriptyline
- Monitor infant daily for changes in sleep, feeding patterns, and behaviour
Depression in children/ adolescents
- 1st line for moderate to severe major depression = fluoxetine and citalopram
- 2nd line = other SSRIs (paroxetine has most AE)
- 3rd line = venlafaxine
- Best outcomes when combine antidepressant w/ CBT
- Monitor suicidal thoughts!!
Red flags for antidepressants (when to avoid certain ones)
- Avoid bupropion and TCAs in seizures
- Avoid SSRIs, venlafaxine, TCAs, and MAOIs in sexual dysfunction
- Avoid TCAs, MAOIs, and mirtazapine if pt doesn’t want weight gain
- Avoid TCAs if possible in elderly (urinary retention, excessive sedation)
Case specific assessment questions for depression
- Are you having suicidal thoughts?
- Are you having psychotic sx? (hallucinations, delusions)
- Are you still able to go to school/work? (impairment in functioning warrants tx)