The 7 Ds of Depression Stephen Bazire, Chief Pharmacist Norfolk and Waveney Mental Health Partnership NHS Trust
Mar 28, 2015
The 7 Ds of Depression
Stephen Bazire,Chief Pharmacist
Norfolk and Waveney Mental Health Partnership NHS Trust
Declarations of interest (last 3 years)
AstraZeneca – lectures, Bipolar Conference 2005 BMS/Otsuka - Abilify consultancy, lectures Cephalon - one day at ECNP 2004 Denfleet – 2 advisory boards Janssen-Cilag - ECNP 2005, 2006; lectures; APA 2004; CINP
regional 2006 Lilly – lectures, chair meetings Lundbeck - (books) Organon - Advisory Boards, lectures, (books) Sanofi-Synthelabo - lectures, thermal mug Servier – Advisory Board Wyeth – Advisory Board, lectures
UK Psychiatric Pharmacy Group User groups, Norfolk Mental Health Alliance, NICE
Depression
Diagnosis Does it matter if you treat? Drug-induced Drug Dose Duration Discontinuation
Depression - diagnosis
A) Five of the following: Weight changes Sleep disturbance Loss of interest/pleasure Depressed mood Psychomotor agitation or
retardation Recurrent thoughts of death or
suicide Fatigue or loss of energy Feelings of worthlessness Poor concentration
Not organic Not normal
reaction to death of a loved one
No delusions or hallucinations in absence of mood symptoms
Not superimposed on schizophrenia
Is depression on the rise?
Stirling County Study (Atlantic Canada) Same diagnostic criteria used Representative adult population samples
1952, n=1003 1970, n=1201 1992, n=1396
Current incidence 5% for MDD in all years Increased rate in younger women
(Murphy et al, Arch Gen Psych 2000, 57, 209-15)
Lundby study suggested rise in depression in 1950s has levelled off
Higher incidence in women (n=3563, prospective longitudinal study, Mattisson et al, J Aff Dis 2005, 87, 151-60)
Underuse of antidepressants
Survey 1988-1994 (USA) n=7589, aged 17-39 4.1% (312) had DSM-III major depression
Only 7.4% of these were having antidepressants “Telling prescriber the symptoms increased
chance of having an antidepressant 10-fold”
Druss et al, J Clin Psych 2000, 61, 234-7
Suicide
Suicide is a fatal outcome of psychiatric illness Suicide practically does not occur without the presence of
mental illness, most commonly depression, then alcoholism.
Depressed individuals who have committed suicide are seldom treated with antidepressants
Does increased antidepressant use reduces suicide?
14 studies say yes, 2 say no Effect may be even greater in bipolar disorder
where the lithium effect is greater Göran Isaacson, Acta Psychiatr Scand 2006;114:149-50
Effects of treating depression
Sweden: Two year educational programme (GPs on Gotland) Increased antidepressant use Reduced referral, sick leave and in-patient days for depression Significantly reduced suicide
(Rutz et al, Acta Psych Scand 1989;80:151-4) Sweden: Annual on-going educational programme (GPs in Jämtland county) Antidepressant use increased from 25% below national average to the
same level Suicide decreased to the national average
(Henriksson and Isacsson, Acta Psychiatr Scand 2006;114:159-67)Denmark: Suicide rate (1995-1999) has dropped in all groups More markedly in people prescribed SSRIs or older antidepressants
(n=438,625) Compared to those not treated with antidepressants (n=1,199,057)
(4yrs, Søndergård et al, Acta Psychiatr Scand 2006;114:168-76)
The effect of antidepressants on suicide rates in USA
1985-1999 analysis: 20,000 pharmacies in USA Volume of prescriptions for antidepressants Overdose data Alcohol use per capita Employment
Suicide rate fell 13.5% from 12.38 to 10.71/100K Greater fall in women Antidepressant prescriptions rose from 35m to 144m pa 69% of increase was SSRIs
(Grunebaum et al, J Clin Psych 2004;65:1456-62).
10% increase in SSRIs reduced suicide rate by 1.4%
10% increase in 2nd genn reduced suicide rate by 1.2%
Counselling vs antidepressants
Mild to moderate depression, community Antidepressants vs generic counselling 4 treatment groups:
Randomised to antidepressants or counselling (n=103)
Patient preference to antidepressants or counselling (n=103)
Counselling vs antidepressants
Mild to moderate depression, community Antidepressants vs generic counselling 4 treatment groups:
Randomised to antidepressants or counselling (n=103) Patient preference to antidepressants or counselling
(n=103) No outcomes difference between groups (!)
Beck scores, Psychiatrists assessment Patients choosing counselling did slightly better than those
randomised to it Both seem equally effective in mild-to-moderate
depression (n=323, RCT, 8/52+12/12, Chilvers et al, BMJ 2001, 322, 722-75)
Drug-induced depression
Over 150 drugs reported to cause depression e.g:
Alcohol Benzodiazepines
e.g diazepam, clonazepam, temazepam, lorazepam
Antipsychotics Anticonvulsants
e.g. carbamazepine, lamotrigine, levetiracetam, pregabalin, topiramate
Anti-parkinsonian drugs Anticholinergics
H2 blockers Interferons (controversial) NSAIDs eg ibuprofen
Cardiovascular drugs e.g. beta-blockers, calcium
channel-blockers Antibiotics (rare) Baclofen (rare) Steroids (e.g. dexamethasone) Caffeine/caffeine withdrawal Oral contraceptives Simvastatin Dantrolene Tizanidine
Check doses, starting, stopping, previous
historyRef Psychotropic Drug Directory 2007, SPCs, BNF
Antidepressants available in UK
SSRIs: Citalopram (Cipramil), escitalopram (Cipralex), fluoxetine (Prozac), fluvoxamine (Faverin), paroxetine (Seroxat), sertraline (Lustral)
Mirtazapine (Zispin) Venlafaxine (Efexor) Tricyclics: amitriptyline, clomipramine (Anafranil),
dothiepin/dosulepin, doxepin (Sinequan), lofepramine (Gamanil), imipramine, maprotiline, nortriptyline, trimipramine (Surmontil)
Duloxetine (Cymbalta) Trazodone (Molipaxin) Reboxetine (Edronax) Moclobemide (Manerix) MAOIs: Phenelzine, isocarboxazid, tranylcypromine Mianserin, tryptophan, flupenthixol (Fluanxol) Agomelatine (2008), St. John’s wort
Comparative side effects of antidepressants
Anti-cholin-ergic
Cardiac Nausea Sed- ation
Over-dose
Pro-convuls-ant
Sexual dys- function
Tricyclics +++ ++ + ++ ++ + ++
(Es)citalopram (Cipramil/ Cipralex)
O O ++ O O O ++
Fluoxetine O O ++ O O O ++ Paroxetine (Seroxat) O O ++ O O O +++
Sertraline (Lustral) O O ++ O O O ++
Mirtazapine (Zispin) O O O ++ O O O
Reboxetine (Edronax) + + + O O O O
Duloxetine (Cymbalta) O O ++ O ? ? ++
Trazodone (Molipaxin) + + +++ ++ + O ++
Venlafaxine (Efexor) O ++ +++ + ? + ++
Bupropion (Zyban) + O + O ++ +++ O
MAOIs ++ ++ ++ O/+ ++ O +
Agomelatine (TBA)
Modes of action and receptors
SSRIs - 5-HT reuptake inhibitionMirtazapine - increased 5-HT and NE availability, 5-HT2 and 5-
HT3 antagonismVenlafaxine and duloxetine - 5-HT and NA reuptake inhibition
(venlafaxine variable, duloxetine similar)
Trazodone - 5-HT reuptake inhibition and some receptor antagonism
Tricyclics - 5-HT and NE reuptake inhibitionReboxetine - noradrenaline reuptake inhibitionFlupenthixol - Autoreceptor inhibitionMoclobemide - Reversible MAO-A inhibitionMAOIs - Inhibition of MAO-A and MAO-B enzymesAgomelatine - 5HT2C/2B antagonist and melatonin M1/2 agonist
Relevance: as long as it works, side effects
Selected antidepressant side effects
Anticholinergic – dry mouth, blurred vision, constipation Cardiac – prolonged QTc, postural hypotension, tachycardia, Nausea – initial, start with lower doses Sedation - mostly histaminergic effect Overdose toxicity – cardiac Pro-convulsant – bupropion at >300mg/d Sexual dysfunction – lower libido, ED, anorgasmia Anxiety (short-term esp. with SSRIs), appetite changes,
hyponatremia (except mirtazapine), diarrhoea, headache, sweating (esp. at night)
Many can be minimised by starting at lower doses
Usual therapeutic doses for depression
SSRIs: Citalopram (Cipramil) 20-40mg Escitalopram (Cipralex) 10mg Fluoxetine (Prozac) 20mg fluvoxamine (Faverin) 150-300mg? Paroxetine (Seroxat) 20-30mg Sertraline (Lustral) 50-100mgTricyclics: amitriptyline, clomipramine
(Anafranil), dothiepin/dosulepin, doxepin (Sinequan), imipramine, nortriptyline, trimipramine (Surmontil) – 125-150mg/d
Lofepramine (Gamanil) 140-210mg
Newer: Mirtazapine (Zispin) 30-45mg Venlafaxine (Efexor) 75-225mg Duloxetine (Cymbalta) 60-
120mg Trazodone (Molipaxin) 150mg? Reboxetine (Edronax) 8-12mg Moclobemide (Manerix) 300mgMAOIs: Phenelzine 45mg? Isocarboxazid 30mg? Tranylcypromine 30mg? Mianserin, tryptophan,
flupenthixol (Fluanxol), agomelatine (soon)
St. John’s wort
Onset of action of antidepressants
“Antidepressants take 4 weeks to work”
Wrong! 23% of all drug-placebo differences occur within
the first week and 57% were apparent by week 2 (s=47, n=8500, d/b, p/c, Pasternak and Zimmerman, J Clin Psych 2005, 66, 148-58)
“Time to substantial remission” may take 4 weeks in clinical trials
In 90% cases substantial improvement occurs within the first 2 weeks but that the benefit continues to build over several weeks.
(review by Mitchell, B J Psych 2006, 188, 105-6)
Markers of antidepressant response
• If no improvement (even minimal) after 4 weeks of a therapeutic dose, should switch to another one
• With minimal improvement, continue until week 6 but there is only benefit in continuing in about 10% pts
(n=593, Quitkin et al, Arch Gen Psychiatry 1996, 53, 785-92
If there is no response by 8 weeks then the trial should “be declared a failure”
(n=840, 12/52, open, Quitkin et al, Am J Psych 2003, 160, 734-40)
Only 58% people take antidepressants for more than 28 days
(n=829, Offson et al, Am J Psych 2006, 163, 101-8).
Duration of antidepressant therapy summary
40% of people may relapse after an index depressive episode within 2 years, and 60% within 5 years
First episode: Six months after recovery at same dose minimises risk
of relapse(n=839, RCT, one-year, Reimherr et al, Am J Psych 1998, 155, 1247-53
Second episode: 1-2 years
Third or subsequent episode: 3-5 years or longer
(Frank and Kupfer, Arch Gen Psych 1990 and 1992)
Depression relapse prevention
Full-dose vs. half-dose tricyclics
Frank et al, J Aff Dis 1993, 27, 139-45
0
20
40
60
80
100
0 6 12 18 24 30 36Months
% r
emain
ing w
ell
Full-dose TCA
Half-dose TCA
Relapse prevention
Frank and Kupfer, Arch Gen Psych 1990 and 1992
0
20
40
60
80
100
0 6 12 18 24 30 36 42 48 54 60Months
% s
till w
ell
Full-dose3-yr switchPlacebo
Imipramine Study
Frank E et al, Arch Gen Psychiatry 1990;47:1093-9
n=128
Long-term studies
6 months 1 year 2 years +
imipramine 1
fluoxetine 2
citalopram 3
paroxetine 4
sertraline 5
escitalopram
6
duloxetine 7
1. Frank E et al Arch Gen Psychiatry. 1990;47:1093-99 5. Wilson et al, 2003;182:492-72. Reimherr F et al Am J Psychiatry 1998;155:1247-53 6. Kornstein S et al J Clin Psych 2006; 1767-753. Franchini et al J Clin Psychiatry 1999;60:861-5 7. Detke M et al Euro Neuro Psych 2004;457-704. Reynolds C et al New Engl J Med. 2006;1130-8
‘Positive’ long-term studies 6 months 1 year 2 years +
imipramine 1
fluoxetine X2
citalopram X3
paroxetine ?4
sertraline X5
escitalopram
6
duloxetine 7
1. Frank E et al Arch Gen Psychiatry. 1990;47:1093-99 5. Wilson et al, 2003;182:492-4972. Reimherr F et al Am J Psychiatry. 1998;155:1247-53 6. Kornstein S et al J Clin Psych. 2006; 1767-17753. Franchini et al J Clin Psych. 1999;60:861-865 7. Detke M et al Euro Neuro Psych. 2004;457-4704. Reynolds C et al New Eng Jour of Med. 2006;1130-1138
Long-Term StudiesDrug Dosing Regime Results Notes
imipramine (160-200mg)
12 weeks treatment/ 17 weeks continuation/ 3 years maintenance
Relapse prevention over 3-5 years
Includes IPT
fluoxetine (20mg)
12-14 weeks treatment/ 50 weeks maintenance
Positive for 38 wks, no sig diff at 62 wks
4 treatment arms
citalopram
(20-40mg)
6 weeks treatment/ 4 months continuation/ 24 months maintenance
50% recurrence No placebo control. 20mg maint dose
sertraline
(50-200mg)
8 weeks treatment/ 16-20 weeks continuation/ 100 weeks maintenance
No significant difference to placebo at 100 weeks
Pts over 65
paroxetine
(10-40mg)
8 weeks treatment /16 weeks continuation/ 2 years maintenance
Significant difference between groups seen only after adjustment
Pts 70 yrs or over. Includes IPT.
Review of PREVENT Study
Prevention of Recurrent Episodes of Depression with Venlafaxine ER for
Two Years
Long-term treatment: venlafaxine XLPREVENT Study
Acute
(10 weeks)
Continuation
(6 months)
Maintenance A
(1 year)
Maintenance B
(1 year)
Venlafaxine Venlafaxine
Venlafaxine
Venlafaxine
Placebo
Placebo
Placebo
Responders
non-responders
non-responders
non-responders
non-responders
Discontinue Discontinue
Discontinue
Discontinue
Respo
nder
s
Respo
nder
sResponders
Responders
Responders
Simplified design adapted from Kornstein SG et al. Presented at the 6th International Forum on Mood and Anxiety Disorders, Vienna, Austria, November 29-December 1, 2006.
PREVENT: Primary Objectives
Acute Phase (10 weeks): Demonstrate venlafaxine XL efficacy in achieving
satisfactory therapeutic response/remission in MDD patients following 10 weeks of treatment
Continuation Phase (6 months): Demonstrate venlafaxine XL efficacy in sustaining response
(satisfactory therapeutic response/remission) - in MDD patients who achieved these responses in the acute phase
Maintenance Phases (2 consecutive 12-month phases): Compare venlafaxine XL and placebo in preventing
recurrence of depression in MDD patients who are responders after previous phases of venlafaxine XL treatment
Keller M et al Poster presented at ACNP Puerto Rico December 2004
Major Inclusion/Exclusion Criteria
Inclusions: 3 major depressive episodes in lifetime,
including 2 episodes in past 5 years* HAM-D17 of 18 at baseline Symptoms present for 1 monthExclusions: Previous failure to respond to an adequate
trial of venlafaxine In previous 3-years, failed 3 adequate trials of
2 classes of antidepressants*Interval ≥ 2 months between the end of previous episode and beginning of current episode.
Keller M et al Poster presented at ACNP Puerto Rico December 2004
Response/Remission definitions
Satisfactory Therapeutic Response
Total HAM-D17 ≤12 or minimum 50% reduction of total HAM-D17 compared to the acute baseline
Remission
HAM-D17 score ≤7
Sustained Remission
HAM-D17 score ≤7 sustained on two consecutive visits
Keller M et al Poster presented at ACNP Puerto Rico December 2004
Definitions used in post hoc analysis <225mg/d
Doses <225mg in acute or continuation phase Recurrence defined as:
Patients who had total score of HAM-D17>12 and a HAMD17 reduction no more than 50% from acute-phase baseline at two consecutive visits, or at the last valid visit in case of early discontinuation
Or Dose >225mg
Kornstein S et al Poster presented at IFMAD Vienna November 2006
Probability of recurrence – combined maintenance phases
by Dose Subgroup ( 225 mg)
Kornstein S et al Poster presented at IFMAD Vienna November 2006
Summary1-7+8
6 months
1 year 2 years +
imipramine1
fluoxetine2 No significant difference from placebo at 62 weeks
citalopram3 No placebo control
paroxetine4 No significant difference over placebo (unless
adjusted for IPT)
sertraline5 No significant difference to placebo at 100 weeks
escitalopram6
no published data
Duloxetine7 no published data
venlafaxine8
Discontinuing or switching antidepressants
Why discontinue or switch antidepressants?
Lack of efficacy Adverse effects Patient discontinues of own accord End of maintenance phase
What you can do if there is alack of response
1. Increase the dose 2. Switch antidepressants 3. Augment with:
another antidepressant mood stabiliser anxiolytic another drug e.g. pindolol, thyroxine
etc
1. Increasing the dose- types of dose-efficacy relationship
0
10
20
30
40
50
60
70
80
90
100
FlatCurvilinearLinearTherapeutic windowStepped
Summary of dose-response curves
Dose-efficacy Concentration-efficacy
Data Result Data Results
Tricyclics + Curvilinearor linear
+++ Linear, flat,curvilinear ortherapeuticwindow
MAOIs + N/K + Flat
SSRIs +++ Flat ++ Flat
Venlafaxine +++ Curvilinearor linear
++ Linear
Mirtazapine N/K N/K N/K N/K
Fluoxetine fixed-dose study
0
10
20
30
40
50
60
70
Placebo 5mg 20mg 40mg
ResponseRemission
Altamura Altamura et al, B J Psychet al, B J Psych 1988, 1988, 153153(Suppl 3), 109-(Suppl 3), 109-112112
Fluoxetine fixed-dose study
0
10
20
30
40
50
60
Placebo 20mg 40mg 60mg
ResponseRemission
Altamura Altamura et al, B J Psychet al, B J Psych 1988, 1988, 153153(Suppl 3), (Suppl 3), 109-112109-112
Venlafaxine dose-response
0
10
20
30
40
50
60
70
80
Placebo 75mg 225mg 375mg
Response at 6weeksRemission at 6weeks
Rudolph Rudolph et al, J Clin Psychiatryet al, J Clin Psychiatry 1998, 1998, 5959, 116-, 116-122122
The chances of success with increasing dose:
Limited: SSRIs (generally side effects limited) Mirtazapine (unknown)
Possible: Tricyclics (side effects increase) MAOIs (side effects and toxicity increase)
Probable: Venlafaxine (side effects increase)
Switching antidepressants
Factors to consider: Speed at which the
switch is needed Current dose of the
first drug Individual drugs
effects, transmitter effects, kinetics etc
Individual susceptibility to (additive) side-effects
Potential problems: Cholinergic rebound Antidepressant
discontinuation symptoms
Drug-drug interactions Discontinuation effects
from first drug interpreted as side-effects of the second
Serotonin Syndrome for drugs affecting serotonin
Serotonin syndrome
Definition - a toxic state caused by an increase in brain serotonin activity.
Symptoms 1. Neuromuscular
Restlessness Myoclonus Tremor and rigidity Hyperreflexia
2. Others Shivering/elevated temperature Arrhythmias etc.
Can be fatal due to cardiac collapse
Causes Most often with combined or consecutive treatment with SSRIs, tricyclics, MAOIs, tryptophan etc
Treatments Stop drugs - usually
resolves in no more than 24 hours
Symptomatic measures e.g. cooling, BDZs
Prevention take care when combining
or switching serotonergic antidepressants
Discontinuation phenomena
Characteristics: Commence within 1-3 days of stopping or
reducing doses Usually short-lived (1-2 weeks) Rapidly suppressed by re-introduction of
drug Distinct from relapse or recurrence, which
occur 2+ weeks after discontinuation Can occur even with missed doses
Discontinuation symptoms
Tricyclics: Cholinergic rebound
headache, restlessness, diarrhoea, nausea
‘flu-like symptoms, cramps lethargy sleep disturbances movement disorders
SNRI (venlafaxine): Fatigue, headache,
restlessness, nausea abdominal distension,
congested sinuses
“SSRI discontinuation”: Dizziness, light-headedness Sleep disturbances agitation, volatility electric shocks in the head nausea, fatigue, headache ‘flu-like symptoms
Mirtazapine & reboxetine: Little or nothing reported MAOIs: Confusion, delirium,
psychosis
Paroxetine discontinuation
0
20
40
60
80
100
120
Time since last dose
Pla
sma leve
l Daily paroxetine
ParoxetinediscontinuationNormal decay
“MedEd” technique
Craving? Tolerance? Withdrawal? Immediateeffect?
Alcohol
Opiates
Caffeine
Nicotine
Cannabis x
Hypnotics x
Antidepressants x ? () x
Antipsychotics x x () ()
Lithium x x x
Insulin x x ()
STAR*DSequenced Treatment Alternatives to Relieve Depression
Largest ever RCT in depression Independent, funded by NIMH
Focus on REMISSION Inclusions:
MDD, chronic depression, co-morbidities (61.5%) Exclusions:
OCD, eating disorders, bipolar, prior non-response, pregnant, breast-feeding, recent hospitalisation for SM, psychotic depression
Drugs/strategies chosen as safest, easiest and most used
STAR*D Level 1 – open SSRI
Remitters followed up over one year Non-responders or intolerant entered level 2 Some would also have been partial responders Patients had choice in which type of strategy
Level 2 – switch or augment Level 3 – switch or augment Level 4 – switch
STAR*D – conclusionsLevel 1: Give people 8/52 to respond Push citalopram to 40(-60)mg/d Level 2: Switching to another SSRI is as effective as other switches Switching may be better if no response Augmentation may be better if partial/incomplete
response but could actually just be delayed SSRI response (other RCTs)
Level 3: No significant difference between mirtazapine or
nortriptyline in response or tolerability Augmentation looks better Don’t know if these would have been better earlier Level 4: Response limited
Depression in bipolar disorder
Bipolar depression: is more resistant and longer-lasting
up to 50% may still be depressed at one year (Hlastala et al, Depress Anxiety 1997, 5, 73–83)
may respond to mood stabilisers e.g. lithium, valproate, carbamazepine etc
is susceptible to manic switch, especially in first 12 weeks
use lowest switch risk drugs, eg. SSRIs, mirtazapine Beware of inducing a mixed state in bipolar III
risk of self-harm/suicide is high
Antidepressants in bipolar depression
Antidepressant (paroxetine <40mg/d or bupropion <375mg/d)
or placebo plus Mood stabiliser (lithium, valproate, carbamazepine or a
licensed antimanic agent e.g. olanzapine, risperidone, aripiprazole, quetiapine, ziprasidone)
Outcome aim was 8/52 euthymia: Mood stabiliser and antidepressant response 23.5% Mood stabiliser and placebo response 27.3%
Longer-term adjunctive antidepressants have no therapeutic advantage
but at least the antidepressant did not increase the risk of relapse or switch to mania nor have greater ADRs
(n=366, RCT, d/b, p/c, 26/52, STEP-BD, Sachs et al, N Engl J Med 2007;356:1-12)
Quetiapine in bipolar depression
BOLDER 1 n=542, MD episode in
Bipolar I or II Response
600mg/d = 58.2% 300mg/d = 57.6% placebo = 36%
Remission 52.9% vs 28.4% Treatment emergent mania
3-4% for both groups
(n=542, RCT, d/b, p/c, 8/52, Calabrese et al, Am J Psych 2005,
162, 1351-60)
BOLDER 2 Quetiapine 300mg and
600mg/d monotherapy equally effective in bipolar I and II depression
53% response in BD
(n=542, RCT, 8/52, p/c, Hirschfeld et al, J Clin Psychiatry
2006;67:355-62).
Lamotrigine
Lamotrigine 50–200mg/d monotherapy significantly more effective than placebo in bipolar I depression
n=195, RCT, Calabrese et al, J Clin Psychiatry 1999, 60, 79–88
Survival rates favoured lamotrigine, with 41% stable without relapse at 6/12 (cf 26% placebo)
Well-tolerated, may thus be useful in some rapid-cyclers n=324, open + n=182 d/b maintenance phase,
Calabrese et al, J Clin Psych 2000, 61, 841-50
Two unpublished, negative studiesUnlicensed in UK, and never will be
NICE mentioned for relapse prevention of bipolar depression
Conclusion
Depression is a chronic condition and antidepressants:
are effective in acute depression prevent relapse are not addictive nor dependence prone help correct a chemical imbalance have no major documented long-term harmful effects appear to be widely used sub-optimally
Resistant depression might be undiagnosed bipolar Education about antidepressant use should be integral
with all prescribing, as it improves attitudes and hence “concordance”