Mrs. Bond, a 46-year-old woman, presented with symptoms of depression including appetite loss, low mood, inability to sleep, and loss of interest in activities over the past two months. She was diagnosed with major depression. Most respondents would prescribe an SSRI as initial antidepressant therapy, with sertraline and paroxetine being most common choices. Respondents based their choices primarily on efficacy and adverse effect profiles of the drugs. Most would maintain antidepressant therapy for a minimum of six months after initial response.
This is a project for a high school AP Psychology course. This is a fictionalized account of having a psychological ailment. For questions about this blog project or its content please email the teacher Chris Jocham: jocham@fultonschools.org
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Defecation
Normal defecation begins with movement in the left colon, moving stool toward the anus. When stool reaches the rectum, the distention causes relaxation of the internal sphincter and an awareness of the need to defecate. At the time of defecation, the external sphincter relaxes, and abdominal muscles contract, increasing intrarectal pressure and forcing the stool out
The Valsalva maneuver exerts pressure to expel faeces through a voluntary contraction of the abdominal muscles while maintaining forced expiration against a closed airway. Patients with cardiovascular disease, glaucoma, increased intracranial pressure, or a new surgical wound are at greater risk for cardiac dysrhythmias and elevated blood pressure with the Valsalva maneuver and need to avoid straining to pass the stool.
Normal defecation is painless, resulting in passage of soft, formed stool
CONSTIPATION
Constipation is a symptom, not a disease. Improper diet, reduced fluid intake, lack of exercise, and certain medications can cause constipation. For example, patients receiving opiates for pain after surgery often require a stool softener or laxative to prevent constipation. The signs of constipation include infrequent bowel movements (less than every 3 days), difficulty passing stools, excessive straining, inability to defecate at will, and hard feaces
IMPACTION
Fecal impaction results from unrelieved constipation. It is a collection of hardened feces wedged in the rectum that a person cannot expel. In cases of severe impaction the mass extends up into the sigmoid colon.
DIARRHEA
Diarrhea is an increase in the number of stools and the passage of liquid, unformed feces. It is associated with disorders affecting digestion, absorption, and secretion in the GI tract. Intestinal contents pass through the small and large intestine too quickly to allow for the usual absorption of fluid and nutrients. Irritation within the colon results in increased mucus secretion. As a result, feces become watery, and the patient is unable to control the urge to defecate. Normally an anal bag is safe and effective in long-term treatment of patients with fecal incontinence at home, in hospice, or in the hospital. Fecal incontinence is expensive and a potentially dangerous condition in terms of contamination and risk of skin ulceration
HEMORRHOIDS
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FECAL INCONTINENCE
Fecal incontinence is the inability to control passage of feces and gas from the anus. Incontinence harms a patient’s body image
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An enema is the instillation of a solution into the rectum and sig
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Using the drugs that prevent and treat disease by killing microscopic organisms in a responsible way
GOAL
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being to preserve human and animal health and the effectiveness of antimicrobial medications.
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to minimize the developme
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3. 2
Scenario
Mrs Bond is a 46 year old who is agitated, and complains of appetite loss and
low mood over the previous two months. During the examination she is teary,
complains of inability to sleep, and loss of interest in work and leisure
activities. She has been stressed and unable to function at work. The patient
denies any suicidal thoughts. Physical examination and other investigations
are normal, and the diagnosis of major depression is made. You agree with
Mrs Bond to schedule a series of appointments for counselling. Because of
the severity of the symptoms, which meet diagnostic criteria for major
depression, you decide to initiate antidepressant therapy.
Inside
Results
In summary page 3
In detail page 4
Expert commentaries
Dr Bill Lyndon page 9
A/Professor Dimity Pond page 12
4. Case Study Results
Results in summary
1119 responses were received to this case study and the aggregate results of two hundred responses
were compiled for feedback.
Most respondents (74%) prescribed a selective serotonin reuptake inhibitor (SSRI) as
initial antidepressant therapy. Sertraline (35%) and paroxetine (21%) were the most
common. Tricyclic antidepressants (TCAs) were chosen for 11% of respondents and
nefazodone, moclobemide and venlafaxine, combined, accounted for 14%.
Over 88% of respondents indicated their choice of antidepressant was influenced by
efficacy and adverse effect profiles. Reasons specified included proven effectiveness,
past prescribing success and lower incidence of adverse effects with the SSRIs and
newer antidepressants.
Most prescribers (84%) of SSRIs would discuss the frequent adverse effects with the
patient and of these 13% would also provide management advice for adverse effects,
especially if symptoms persisted after 1-2 weeks. All the prescribers of nefazodone,
venlafaxine and moclobemide would provide the patient with specific adverse effects.
Half of these prescribers would also discuss management of adverse effects. The
prescribers of TCAs would discuss the common adverse effects and included the
warning to avoid alcohol and /or caution about driving machinery. Other important
information given to the patient included delay in onset of action, timeframe of
treatment, and importance of compliance.
The majority of respondents would not prescribe any other drug therapy (64%). Of the
36% who would prescribe other drug therapy, 32% would prescribe a concomitant
benzodiazepine. Only 4% indicated they would change antidepressant therapy if
initial choice gave a poor response.
Most respondents would maintain antidepressant therapy for a minimum of six months after initial
response.
3
5. Results in detail
Question 1
What would you prescribe as initial antidepressant therapy?
Choice of antidepressant and starting doses are shown in the table below.
Drug Brand name Starting dose Percentage
4
respondents
SSRIs
25mg daily 1
25mg–50mg daily 2
50mg daily 30
Sertraline1 Zoloft
50mg-100mg daily 2
10mg daily 1
10mg-20mg daily 2
Citalopram2 Cipramil
20mg daily 8
10mg daily 3
10mg-20mg daily 1
Paroxetine1 Aropax
20mg daily 17
Fluoxetine Lovan, Prozac, Zactin
Auscap, DBL or SBPA
Fluoxetine, Fluohexal
20mg daily 5
Fluvoxamine Luvox, Faverin 100 50mg daily 1
100mg daily <1
Other newer antidepressants
50mg twice daily 1
100mg twice daily 2
150mg twice daily 1
Nefazodone2 Serzone
300mg daily 1
Venlafaxine Efexor XR 75mg XR daily 3
150mg daily <1
Reversible monoamine oxidase A inhibitor
150mg twice daily 2
300mg twice daily 2
300mg daily <1
Moclobemide Aurorix, Arima,
DBL Moclobemide
600mg daily <1
Tricyclic antidepressants
25mg daily4 3
50mg daily 1
75mg daily 4
Dothiepin Dothep, Prothiaden
75mg-150mg daily 1
Nortriptyline Allergon 75mg daily <1
Trimipramine Surmontil 75mg daily <1
Amitriptyline3 Endep, Tryptanol,
Tryptine, Amitrol
50mg daily <1
Doxepin3 Deptran, Sinequan 50mg daily <1
Other antidepressant therapy
Mianserin Lumin, Tolvon 30mg daily <1
Other drug therapy
Oxazepam5 Murelax, Serepax,
Alepam
15mg three times daily <1
1 One respondent gave a choice of either sertraline or paroxetine
2 One respondent gave a choice of either citalopram or nefazodone
3 One respondent chose either doxepin or amitriptyline
4 Five respondents would rapidly increase dose within a week to 75-150mg
5 One respondent chose oxazepam as initial therapy before prescribing an antidepressant
6. Question 2
What influenced your choice of initial antidepressant drug therapy?
Over 88% of respondents indicated their choice of antidepressant was influenced by efficacy and
adverse effect profiles. The following table shows the reasons why prescribers chose one antidepressant
over another.
Choice of initial Influenced by (%)
antidepressant
Percentage
respondents* Efficacy Adverse
5
effects Cost Other
reasons
Sertraline 35 34 33 6 18
Paroxetine 21 18 16 3 10
Citalopram 11 9 11 4 3
Dothiepin 9 7 5 3 4
Moclobemide 5 5 5 2 1
Nefazodone 5 5 5 1 1
Fluoxetine 5 4 4 2 2
Venlafaxine 4 3 3 1 1
Fluvoxamine 2 2 2 1 1
Mianserin 1 1 1 1 0
Trimipramine 1 1 0 0 1
Nortriptyline 1 1 0 0 1
Amitriptyline 1 0 1 1 0
Doxepin 1 0 1 1 0
Oxazepam 1 1 0 0 0
* Several respondents gave more than one choice
Common reasons given for choice of initial antidepressant are listed below:
Efficacy
Proven effectiveness (literature or past experience)
Equal efficacy to other antidepressants
Quick onset of action
Good for agitation and/or anxiety
Adverse effect profile
SSRIs
ƒ Minimal adverse effects
ƒ Less adverse effects than TCAs
ƒ Better profile than other SSRIs
e.g. 40% of paroxetine prescribers and 24% of citalopram prescribers
ƒ Causes less agitation
ƒ Safer in overdose
Nefazodone
ƒ Minimal adverse effects
ƒ Better profile than SSRIs
e.g. of the nefazodone prescribers 55% indicated less insomnia, 27% less
agitation, and 18% less sexual dysfunction.
ƒ Safer in overdose
TCAs
ƒ Benefit of sedation
ƒ Better profile than SSRIs
e.g. less agitation
Cost
SSRIs were comparable to others
TCAs were cheaper
7. 6
Other influences
Familiarity with prescribing the antidepressant
SSRIs were considered better for compliance because of dosage schedule and
better adverse effect profile.
Degree of sedation and anxiolytic properties
Safety in overdose.
Question 3
What would be your target maintenance dose of antidepressant?
The respondents’ choices of target maintenance doses are shown in the table below.
Antidepressant Target maintenance dose Percentage
Respondents
50 mg daily 2
50-100 mg daily 18
100 mg daily 8
100-150 mg daily 3
Sertraline
max. 200 mg daily 3
20 mg daily 11
20-40 mg daily 7
40 mg daily 1
50 mg daily 1
Paroxetine
unspecified 1
20 mg daily 8
20-40 mg daily 2
Citalopram
max. 60 mg daily 1
20 mg daily 3
20-40 mg daily 1
Fluoxetine
40 mg daily 1
Fluvoxamine 300 mg daily 1
100-300 mg daily 1
100-150 mg daily 1
150mg-300mg twice daily 4
Nefazodone
200mg-300mg twice daily 2
75mg daily 1
75mg-150mg daily 1
150mg daily 2
Venlafaxine XR
max. 225mg daily 1
300mg-600mg daily 2
600mg daily 2
Moclobemide
600mg-1200mg daily 1
50mg-150mg daily 4
100mg-150mg daily 1
150mg daily 3
Dothiepin
150mg-200mg daily 1
Nortriptyline 75mg-150mg daily 1
Doxepin 150mg daily 1
Amitriptyline 150mg daily 1
Trimipramine 75mg daily 1
Mianserin 30mg-90mg daily 1
Question 4
What specific information about antidepressant therapy would you give the patient?
From prescribers of SSRIs
84% of prescribers of SSRIs would discuss common adverse effects with the patient.
8. Specific adverse effects of SSRIs discussed Percentage respondents*
Gastrointestinal disturbances / nausea 49
Sleep disturbances / insomnia 32
Agitation or anxiety 25
Sexual dysfunction 17
Headache 9
Nervousness / tremor 5
Dizziness 5
Serotonin syndrome 2
**Others 8
* Respondents may have indicated more than one adverse effect
** Several respondents indicated weight gain as an adverse effect of paroxetine
Other specific information given to patients on SSRIs
Other specific information on SSRIs Percentage respondents
Delay in onset of action 60
Timeframe of treatment / time until maximum effect 33
Compliance need for counselling or review 18
Drug interactions 15
Advised not to stop abruptly 11
Mode of action 12
Dosing schedule 7
No addiction 7
Caution with driving / machinery or alcohol 5
Other 7
For prescribers of nefazodone, venlafaxine moclobemide
All respondents mentioned specific common adverse effects. Gastrointestinal adverse
effects were mentioned for nefazodone. Dry mouth and dizziness were specifically
mentioned for moclobemide. Half of the respondents commented on adverse effect
management, if problematic. Other information to be provided included delay in onset
of action, timeframe of treatment and importance of compliance.
For prescribers of TCAs
The specific adverse effects mentioned by these respondents (11%) included sedation
or drowsiness, gastrointestinal disturbances, anticholinergic effects and postural
hypotension. Of these respondents 54% advised the patient to avoid alcohol and/or
cautioned about driving machinery. Delay in onset of action, timeframe of treatment
and the need for counselling were also commonly mentioned.
7
9. Question 5
Would you prescribe any other drug therapy? If yes, what drug, dose and frequency?
Most respondents (64%) would not prescribe any other drug therapy. One third of the
respondents (36%) who considered prescribing other drug therapy interpreted the
question in two ways.
Concomitant therapy
Some respondents (32%) who considered co-prescribing with an antidepressant chose
benzodiazepines. The most common benzodiazepine prescribed was temazepam 10mg
at night. Two-thirds of these prescribers also stated that the length of treatment should
only be 1-2 weeks or short term to overcome initial insomnia.
Alternative therapy if poor response
A small number (4%) of respondents assumed that the question was about alternative
selection of an antidepressant if there was a poor response to the first agent chosen.
Examples of the suggested alternatives of antidepressant therapies are listed below.
Other drug therapies prescribed if poor response to initial choice
Oxazepam to paroxetine
Sertraline to paroxetine
Sertraline to moclobemide
Moclobemide to fluoxetine
Moclobemide to doxepin
Fluoxetine to nefazodone
Citalopram to TCA
Sertraline to TCA
Question 6
For how long after initial response would you expect to maintain antidepressant
therapy?
A minimum of six months was the most common length of treatment chosen. Summary of responses
are shown below.
Months of antidepressants therapy after initial response Percentage respondents
0-3 months 7
3-6 months 14
6 months 40
6-12 months 29
12 months 5
12-24 months 3
5% of respondents gave nonspecific answers or stated the duration of treatment depended on frequency
of recurrent episodes.
8
10. 9
Expert commentary
Dr Bill Lyndon
Psychiatrist, Mood Disorder Unit, Northside Clinic, Sydney
Lecturer, Department of Psychological Medicine,
University of Sydney
This is a typical presentation of depression in general practice. Key points are that the symptoms meet
diagnostic criteria for depression, so treatment is required, and that the severity of symptoms and
degree of loss of psychosocial functioning are sufficient to warrant antidepressant treatment as part of
the management. The suicide risk appears low, so management in the general practice setting is
appropriate.
Question 1
What would you prescribe as initial antidepressant therapy?
There are no apparent comorbid medical or psychiatric illnesses present which might influence the
choice of antidepressant. Nearly 90% of respondents chose one of the newer antidepressants over the
tricyclics and the majority chose an SSRI. Any of the new antidepressants would have been an
appropriate first choice and it is interesting that the SSRIs were favoured over nefazodone,
moclobemide and venlafaxine. There are no apparent clinical features which would support choosing
an SSRI over the other new drugs, so other factors are clearly relevant. Choosing a tricyclic first in a
young healthy woman is not unreasonable, but the advantages of the newer drugs indicate that these are
a better first choice for most cases.
Most respondents chose an appropriate and standard starting dose. Some chose
smaller starting doses and in an agitated, anxious patient or in a patient with a past
history of antidepressant induced agitation this would be sensible. Starting with too
high a dose is to be avoided because of the added side effect burden and probable loss
of compliance. Some chose a large starting dose: for nefazodone ≥300mg, for
moclobemide of 600mg and for dothiepin ≥75mg. These starting doses would be
poorly tolerated by many patients.
Question 2
What influenced your choice of initial antidepressant drug therapy?
Most respondents accept that there is little if any difference in efficacy between the various
antidepressants and based their choice on other factors, namely safety, side effect profile, simplicity of
dosing and familiarity with the particular drug. Cost did not figure prominently, so presumably the
advantages of the new drugs are considered to outweigh the cost advantages of the tricyclics. Most
clinicians would also be aware that although the cost to the patient of TCAs is less, indirect costs as a
result of non-compliance, side effects or iatrogenic illness associated with tricyclics tend to reduce the
cost differential.
The SSRIs have varying capacities for causing agitation, insomnia and sexual
dysfunction and there is also wide individual variation among patients to develop side
effects to a particular SSRI. It is therefore difficult to generalise about the side effect
potential of a particular drug for a particular patient and clinicians should be prepared
to switch from one SSRI to another if the first choice proves unacceptable.
It is likely that those who chose a TCA did so because of the sedating properties and to avoid
worsening the patient’s insomnia. While this is reasonable, it is important to note that sleep is not
always worsened by the newer drugs; it is often improved and if there is a problem it is likely to be
temporary and appropriately managed with short term use of a hypnotic. Similarly, the new
11. antidepressants often have a calming effect on anxious, agitated patients and should not be avoided for
this reason only.
The side effect of sexual dysfunction was considered by a minority of respondents. While this may not
be relevant to the majority of depressed patients in the acute phase, it is likely to become more of an
issue after recovery and may become an important reason to consider changing antidepressant.
Question 3
What would be your target maintenance dose of antidepressant?
In general, antidepressants need to be given at full dosage for maintenance treatment and not reduced.
The answers mostly are consistent with this. There was a trend for some antidepressants to be given at
higher doses during the maintenance phase, which probably reflects an expectation that for SSRIs at
least, doses would need to be increased above the starting dose to achieve remission. This trend was
more noticeable for sertraline and paroxetine than for the other SSRIs and other new antidepressants.
This suggests that doses for sertraline and paroxetine may be escalated too rapidly and unnecessarily.
For most patients on SSRIs, the starting dose will be adequate to produce response and dose increases
should not be necessary before 3-4 weeks. There is no doubt that some patients will require these
higher doses but the majority will not.
Doses given for nefazodone may be inadequate – 400-600mg will be needed for most
patients. Similarly, the doses for the TCA dothiepin are low, less than 150mg mostly,
and this would generally be considered to be subtherapeutic. It has long been
appreciated that TCAs are generally used in inadequate doses in general practice.
Question 4
What specific information about antidepressant therapy would you give the patient?
Most respondents indicated they would give appropriate advice about the
antidepressant, but the breakdown figures indicate that some important advice is not
being given. A minority only would warn about insomnia, agitation, sexual
dysfunction and abrupt discontinuation. The timeframe of response does not appear to
be adequately discussed. All patients should be informed of the delayed onset of
action and that response may not be achieved in less that 3-4 weeks or possibly 4-6
weeks. Unrealistic patient or doctor expectations of recovery may lead to non-compliance,
premature discontinuation or pressure to increase doses or change drugs.
10
12. Question 5
Would you prescribe any other drug therapy? If yes, what drug, dose and frequency?
Short-term use of a hypnotic such as temazepam can be very useful to assist with the insomnia of
depression or antidepressant induced insomnia. Most respondents accept the usefulness of this strategy.
Benzodiazepine anxiolytics were nominated by a small number of respondents only and this is
consistent with good practice. There is no history of anxiety with this patient and therefore no reason to
prescribe an anxiolytic. In particular, there are no panic symptoms and alprazolam therefore does not
have a place.
Anxiolytics may at times be a helpful addition, but the anxiety associated with depression will usually
settle quickly once treatment has commenced, even with the SSRIs. If a patient develops severe
agitation with an antidepressant, which does not settle, changing antidepressant should be considered as
an alternative to adding an anxiolytic.
Changing if poor response
This raises some interesting points of how to manage this problem. Some (4%) of respondents
volunteered that they would change to another antidepressant if the first choice was ineffective. If the
first choice is ineffective, then a second trial with a different antidepressant, preferably from a different
class, is the correct action.
There is inadequate evidence to support the efficacy of combining antidepressants and there are
significant risks of drug-drug interactions leading to delayed metabolism and potentially dangerous
serum levels (e.g. SSRIs + TCAs), as well as serotonin syndrome (combine SSRIs + MAOI, SSRI +
SSRI). Combining antidepressants is not a strategy for use in general practice and it is debatable
whether it is appropriate in psychiatric practice.
Question 6
For how long after initial response would you expect to maintain antidepressant
therapy?
Assuming this is a first episode and the patient does not suffer from recurrent
depression, then the medication should be continued for 6 months. With recurrent
depression, 6-12 months or longer, possibly indefinitely, is more appropriate. Six to12
months would also be appropriate following severe episodes with profound loss of
functioning especially if the risk of suicide is high. A significant minority of
respondents elected to continue medication for greater than 6 months, which would be
unnecessary for the patient described, provided that full remission is achieved and
there are no ongoing unresolved risk / aetiological factors.
11
13. Associate Professor Dimity Pond
Société Professor in General Practice,
Faculty of Medicine Health Sciences, University of Newcastle
This is a typical case in General Practice, although in real life I would like to look at
current stressors as well as noting the symptoms of depression during the first
consultation. I would also assess her for any symptoms of psychotic depression (e.g
visual or auditory hallucinations) as well as for suicidality. The presence of either
would increase the likelihood that I would refer her for specialist review.
Question 1
What would you prescribe as initial antidepressant therapy?
88% of respondents would prescribe one of the newer antidepressant agents as initial
drug therapy. I would tend to agree with them.
Question 2
What influenced your choice of initial antidepressant drug therapy?
My choice would be influenced by the superiority of the newer agents in the case of
overdose. Although this patient denies suicidality, this possibility should always be
considered in a case of major depression.
Many GPs commented on the side effect profiles of SSRIs compared with tricyclics. While SSRIs
avoid many of the unpleasant side effects of the tricyclics, such as dry mouth and drowsiness, there are
still a number of possible side effects with all the newer agents, including agitation and sexual
dysfunction, and these should be discussed with the patient. The agitation this patient is already
exhibiting might provide a rationale for prescribing one of the older more sedating tricyclics.
However, this needs to be balanced against her need to function at work and home and the risk of
suicide.
Question 3
What would be your target maintenance dose of antidepressant?
The target maintenance dose should be that which maintains the patient’s function and
keeps her as free as possible from the symptoms of depression, provided that side
effects are taken into account.
Question 4
What specific information about antidepressant therapy would you give the patient?
I believe it is essential to discuss possible side effects with the patient and refer her to
the consumer medicines information (CMI) leaflet to ask her to ring if she experiences
any symptoms she doesn’t understand.
It is also very important to emphasise that all antidepressants take time to work, and it may be a number
of weeks before she notices an improvement. I like to support patients to follow up visits during this
period of waiting.
Furthermore, I usually point out that counselling is an important part of treating depression, and that
there may be some ways in which she can learn to help herself through this difficult illness.
I would also tell her that she would need to stay on the therapy for at least six months,
and that she should not stop it suddenly, or she may suffer from discontinuation
effects.
12
14. Question 5
Would you prescribe any other drug therapy? If yes, what drug, dose and frequency?
I wouldn’t prescribe any other drug therapy at this stage. Later in the course of the
illness, of any initial drug therapy had failed over sufficient time (e.g 3-6 months),
then I would consider changing her to a different class of agent.
Some respondents suggested the use of benzodiazepine in this setting. Benzodiazepines can be used to
tide a patient over until the antidepressant starts to work, but the possibility of addiction and of
withdrawal agitation needs to be balanced against the short-term benefit.
Question 6
For how long after initial response would you expect to maintain antidepressant
therapy?
In my view, antidepressant therapy needs to be regarded as long term. I would not
consider cutting down on the maintenance dose in under 3 months, and normally
expect patients to stay on this therapy for at least six months. Some patients may need
to stay on antidepressants longer than this.
13