Recognition and Treatment of Panic Disorderinhn.org/fileadmin/user_upload/User_Uploads/INHN/... ·...
Transcript of Recognition and Treatment of Panic Disorderinhn.org/fileadmin/user_upload/User_Uploads/INHN/... ·...
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Recognition and Treatment
of Panic Disorder
R. Bruce Lydiard, MD, PhD
Univerwsity of South Carolina
& Southeast Health Consultants
M Katherine Shear, MDUniversity of Pittsburgh School of Medicine
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Pre-Lecture Exam
Question 1
1. The lifetime prevalence of panic disorder is approximately:
A. 17.1%
B. 0.7%
C. 3.5%
D. 24.9%
E. 13.3%
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Question 2
2. Which of the statements regarding panic disorder treatment is true?
A. Alprazolam is more effective for panic disorder in women than men.
B. Women exhibit a higher rate of post-treatment relapse than men.
C. Buspirone works better for panic disorder in women than for men.
D. Women with panic disorder are at greater risk for depression than men.
E. Women with panic disorder experience only unexpected panic attacks.
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Question 3
3. Compared with normals, individuals with panic
disorder are more likely to exhibit all but which
condition?
A. Migraine
B. Psoriasis
C. Hypertension
D. Irritable bowel syndrome
E. Vertigo
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Question 4
4. Which one of the following statements about co-morbidity in panic disorder is not true?
A. GAD is the most common coexisting psychiatric disorder.
B. Social phobia is the most common coexisting comorbid psychiatric disorder.
C. Approximately 30% of those seeking attention have concomitant depression.
D. Somatization co-occurs with panic disorder in up to 15%.
E. Avoidant personality disorder is the most prevalent Axis II disorder in these patients.
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Question 5
5. Which of the following statements is true regarding the use of buspirone for generalized anxiety disorder?
A. The onset of action is immediate, often as rapid as that of alprazolam.
B. Buspirone may be administered once a day.
C. Patients frequently report drowsiness and sedation.
D. Buspirone carries no risk of dependence or withdrawal symptoms.
E. Optimal response is usually achieved at a dose of 15 mg per day.
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Question 6
6. Which of the following is true regarding generalized anxiety disorder in the elderly?
A. The prevalence of generalized anxiety disorder in the elderly is low.
B. The long acting benzodiazepine diazepam is the preferable medication in these patients.
C. Hepatic clearance of anxiolytic medications is decreased in the elderly.
D. The use of TCA’s is contraindicated in the elderly.
E. Elderly patients require higher doses of buspirone in order to achieve therapeutic effect.
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COSTS OF ANXIETY DISORDERS
Greenberg PE, et al. J Clin Psychiat 1999;60:427-435
54%31%
2% 10%
3%
Direct
Nonpsychiatric
CostsTotal Direct
Psychiatric
Costs
Total Workplace Costs
Pharmaceutical Costs
Mortality Costs
Total $63.1 Billion
(1998)8
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COSTS OF ANXIETY Additional Hidden Costs:
– Educational and career limitation
– Accrual of additional psychiatric disorders and related impairment morbidity
– 16% less people with anxiety are in the workforce vs... those with no anxiety
Greenberg PE, et al. J Clin Psychiat 1999;60:427-435 9
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DSM-IV Panic DisorderOne or more unexpected panic
attacks
At least one month of worry, including change in cognition or behavior
With or without agoraphobia
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Panic Attack SymptomsAt Least 4 Symptoms, Peak in 10-20 Minutes
1. Palpitations, pounding heart
2. Chest Pain or discomfort
3. Shortness of breath
4. Feeling of choking
5. Feeling of dizzy, unsteady, lightheaded or faint
6. Paresthesias (numbness or tingling sensations)
7. Chills or hot flushes
8. Trembling or shaking
9. Sweating
10. Nausea or abdominal stress
11. Derealization (feelings of unreality) or
depersonalization (being detached)
12. Fear of losing control or going crazy
13. Fear of dying11
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Panic Disorder Frequency
in the U.S.
Lifetime 12 Month
Male 2.0% 1.3%
Female 5.0% 3.2%
Kessler et al. 1994
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Yonkers et al. In Submission.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
6 12 24 36 48
Males (N=132)
Females (N=280)
Months
Rate Of Panic Relapse In Treated Men And Women
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Panic Disorder/Panic AttacksMultiple Medical
Evaluations
Agoraphobia (50%)
Social/
Occupational
Disruption/
Disability
Depression
Substance/
Alcohol AbuseMildly
Affected
(50%)Recover
(30%)
Remain Well
Recover
Panic Attacks
(10–35%)
~5%-Frequent
Severe PA
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“The sorrow that has no
vent in tears may make
other organs weep.”
Harry Maudsley, MD 1835-1918
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Medical Utilization
Top 10% of Users
Odds ratio 5 MD visits
Males Female
MDE 1.5 3.4
Panic disorder 8.2 5.2
Phobic disorder 2.7 1.6
Simon and Von Korff, 1991
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Percent Using Emergency Room for
Emotional Problems Past Year
Weissman, 1991
28
11
20
5
10
15
20
25
30
Panic Disorder Major Depression Neither Disorder
Pe
rce
nta
ge
17
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Morbidity of Panic Disorder:
Epidemiological Catchment Area Survey
0 20 40 60 80
% of patients
Depression
Social impairment
Poor health perception
Financial dependence
Emergency room visits
Alcohol abuse
Suicide attempts
Johnson J et al Arch Gen Psych 199018
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0
5
10
15
20
25
30
Unemployed Underemployed
Patients withpanic disorder
Patients withoutpanic disorder
Occupational
Functioning and Panic Disorder
Percent
Katerndahl and Realini. J Clin Psychiatry. 1997.
Ettigi et al. Journal of Nerv and Ment Disorder. 1997.
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Spectrum Panic and Dysfunction
Katerndahl DA, Realini JP. Depress Anxiety. 1998;8:33-38.
Work
Impairment
Infrequent
Limited Panic
Attacks
Panic Disorder
with Frequent
Panic Attacks
Infrequent
Panic
Disorder
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Comparing Disease States
with the Quality of Well-Being
0 .66 .71 .82 1.0
Death
Panic Disorder,
Type 2 Diabetes
AIDS NormalsPerfect
Health
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Baseline 8 Weeks 24 Weeks
Patients
Controls
Quality of Well-Being Scores
Normalize with Panic Treatment
*t = 5.90 ; P .001 †t = 3.91; P .001
‡ns
Quality of
Well-Being Score
*
*
†
†
‡
‡
0.84
0.82
0.80
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
Rubin et al. APA. Miami. 1995.
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Psychiatric Comorbidity
The presence of more
than one psychiatric
disorder at the same time
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A face... Or the word Liar?
Comorbidity:What do you see?
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Comorbid Conditions
Provide Important
Clues
• Clinical characteristics
and severity
• Treatment response
• Course and outcome
Comorbidity In Panic Disorder
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Panic DisorderIncreased Risk for Additional Psychiatric Disorders
Psychiatric Disorder
4.6
88.3
11.7
14.3
17.6
20.7
0
5
10
15
20
25
OCD GAD MDE Mania Phobia PTSD EtOH
Od
ds
Rati
o (
6 m
on
ths)
Kessler, R. Textbook in Psychiatric Epidemiology, 199526
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Comorbidity of Depression
and Panic Disorder
Panic
Disorder
Major
Depression
Major
Depression
Panic
Disorder
Most recent data:1/3 of patients with panic disorder have
current major depression and 2/3 have lifetime major depression
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Panic Disorder and Major Depression
Clinical Characteristics
Over 50% have melancholia
More anxiety
More depression
More phobia
Longer course of illness
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Suicide Attempts
ECA Study: PD + MDD
Johnson et al. Arch Gen Psychiatry. 1990; 47:805
0
5
10
15
20
PD only MDD only PD + MDD
Od
ds
Ra
tio
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Panic Disorder and Major Depression
Long- Term Follow-Up
More psychosocial impairment
- Financial assistance
- Disability
More hospitalizations
Poorer overall outcome
Von Valkenberg et al. J Affect Disord 1984; 6:627
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Frequency of Alcohol Abuse by Diagnosis
Weissman, 1991
11
18
27
0
5
10
15
20
25
30
Panic Disorder Major Depression Neither Disorder
Pe
rce
nta
ge
31
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Psychiatric Approach to the
Panic Disorder Patient
Definitive diagnosis important
Symptom Presentation-->Diagnosis
History of PA in past?
Personal and Family History
Psychosocial and Medical History
Treatment Decisions should be
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Panic Assessment:
Clinical Approach
Elicit Symptoms -->Make Diagnosis
Family History
Psychosocial (stress) , Medical History
Definitive diagnosis important
Treatment decisions should be made
in collaborative fashion
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Panic Attacks:
Differential Diagnosis Different anxiety disorder
– PTSD,Social phobia, OCD, GAD
Substance abuse
– CNS stimulants,sedative-hypnotic withdrawal, cannabis
Medical Condition
– COPD, CAD Medication-OTC, herbals, etc
Other34
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Symptom Presentation: Panic Attacks
Assess panic attacks
– What are Sx?
– Unexpected vs.. “cued” /stimulus bound
– How frequent are they?
Cognitive change present?
– Fear of consequences or implications?
– Are there lifestyle/behavioral changes?
Avoidance due to fear?
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Other Relevant History
Reproductive status/sexual functioning
– pregnancy
– planning pregnancy
Important Relationships
– Can enhance compliance with treatment
– “Safe person”
Assess for occupational, social, family role impairment
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Family History
Panic and other anxiety disorders
Depression
Alcoholism
Treatment and outcome results
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Medical Conditions That Overlap with Panic
Disorder (Conditions with increased frequency of PD)
Mitral valve prolapse
Migraine
Irritable bowel syndrome
Chronic fatigue syndrome
Vertigo
Hyperventilation syndrome
Premenstrual syndrome
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Routine Medical Evaluation for
Panic Disorder
History
Complete description of physical symptoms
Medical history
Family history
Drug and medication history
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Routine Medical Evaluation for Panic
Disorder
Physical examination
EKG
Laboratory
- CBC
- Electrolytes, BUN, creatinine, glucose
- Urinalysis
- T4, and TSH
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Indicators for Further Medical
Evaluation
Panic attacks clearly and consistently related in time to meals
Loss of consciousness
Seizures, amnestic episodes
Symptoms similar to panic attacks but without the intense fear or sense of impending doom (non-fear panic attacks)
Unresponsiveness to treatment
Real vertigo
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Possible Sites of Action of Treatments
Innate
anxiety
circuit
Perceived
Threat
SSRI, TCAs,
MAOIs
BZs / alcohol
Avoidance
Cortical
processing Social
skills
training
Behavior
(Exposure)
therapy
x
Autonomic
symptoms-blockers x
Distorted
cognitionsCognitive
therapyx
x
x
x
SSRIsx
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Panic Disorder Treatment:
General Principles Collaborative-Consultant Approach
Education
– Diabetes as Model for education
– Patient and Family/Significant Other
– “Normal response to panic attacks”
– Not the patients fault--familial/genetic
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Panic Disorder Treatment:
General Principles
Pharmacotherapy
Cognitive-Behavior Therapy (CBT)
– Manual-driven CBT treatment to normalize “catastrophic thinking”
– Exposure to panic Sx, other feared situations
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Panic Disorder Treatment:
General Principles
Medication Rx: Antidepressant
SSRIs First Line
– Other ADs work
– Venlafaxine (Effexor)
– Nefazodone(Serzone)
– Benzodiazepines and Beta-blockers useful adjunctive Rx
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Panic Disorder
Outcome Assessment Phobic avoidance
Cognitive distortion
Depression
Substance or alcohol
Somatic symptoms
Panic attacks least useful measure
Functional status is key issue !!
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Panic Disorder:
Patient Orientation Outline plan and expected response
– Order of symptom relief (PA-->Phobia)
– Time frame
– Map out “next steps”
Address drug treatment duration
– Eyeglasses as model
MD as collaborator-consultant
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Panic Disorder:
Initial Treatment Considerations
Anticipate drug side effects
– Mental Judo:(“jitteriness= correct
Dx) during initiation of meds
Office/phone contact often
initially to enhance compliance
later
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Clinical Response in Panic
Order and Timing
Unexpected Panic -anticipatory anxiety>--cognitive -->agoraphobia
– Reverse of order of onset
Time Frame-Varies Significantly
– 2-6 weeks-unexpected PA subside
– 8-12 weeks-Cued panic, anticipatory anxiety
– 8-? Weeks-Agoraphobic avoidance
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CBT for Panic Disorder
Based upon empirical evidence for fear of bodily sensations in panic disorder
Target 1: Decrease physical sensationsTechnique: Breathing retraining
Target 2: Interrupt catastrophic misinterpretation of bodily sensationsTechnique:Cognitive restructuring
Target 3: Decrease conditioned fear of bodily
sensations
Technique: Interoceptive exposure
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CBT for Agoraphobia
Develop hierarchy of phobic
situations (crowds, bridges,
tunnels etc.)
Conduct therapist-assisted
and/or homework-assigned
In vivo exposure to phobic
situations
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Panic Disorder Medications
SSRIs, Novel ADs
Benzodiazepines
TCAs
MAOIs
Activation , sexual dysfunction, weight gain
Not antidepressant , physiologic dependence/ potential withdrawal, initial coordination and sedation effect
Limited range of efficacy, activation, cardiovascular adverse effects , overdose danger
Diet / drug interaction, postural hypotension, hyposomnia, weight gain, sexual dysfunction, overdose danger
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Panic Disorder
Medications That Don’t Work
Bupropion (Wellbutrin)
Trazodone (Desyrel)
Buspirone (Buspar)
Neuroleptics*Beta-blockers
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Panic Disorder:
SSRIs are “First Line” Treatment*
Efficacy ~ 50-70% for each SSRI
Different patients may respond to different SSRIs
Try ≥ two SSRIs before switching class
Initial dose = 1/4 to 1/2 initial antidepressant dose- (or less!)
Fruit Juice (“Cran-zac”, “Applezac”), water, applesauce to allow small initial dose
Final dose may be more than 2x antidepressant dose
*APA Treatment Guidelines54
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SSRIs for Panic Disorder:
Advantages
Wide safety margin
Relatively low side effect profile
Broad spectrum of mood and anxiety efficacy
No significant cardiovascular effects
No or minimal anti-cholinergic effects
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SSRIs For Panic Disorder:
Disadvantages
May have delayed onset
Initial activation
Sexual side effects -25-60%
Weight gain over 3-12 months in small but clinically significant subgroup
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SSRI Treatment of Panic Disorder
Low initial dosing (25–50% antidepressant dose)
– Sertraline 12.5–25 mg
– Paroxetine 10–20 mg
– Fluoxetine 5–10 mg
– Fluvoxamine 25–50 mg
– Citalopram 10–20 mg
Antidepressant dosage level or above often required
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TCAs
Advantages
Volume of clinical experience
Antidepressant
Imipramine + desipramine plasma
levels ≥ 100 ng/ml likely effective
for many patients
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TCAs for Panic Disorder:
Disadvantages
Delayed onset of action
Significant side effects burden
Weight gain
Sexual dysfunction 25-40%
Anticholinergic effects
Cardiotoxicity
Danger with overdose
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Antidepressant Discontinuation
Gradual taper (≥ 2 months)
Properties of agent affect timing and severity of discontinuation Sx
– Shorter t 1/2 -earlier
– No active metabolite-earlier
– Extended release formulation does not protect
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Discontinuation/Withdrawal
Symptoms Following
SSRI Treatment
Anxiety/agitation
Light-headedness
Insomnia
Fatigue
Nausea
Headache
Sensory
disturbance
Zajecka et al. J Clin Psychiatry 1997;58:291.61
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Benzodiazepines for Panic Disorder:
Advantages
Effective
Rapid onset
Tolerability
Safety
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Benzodiazepines for Panic Disorder:
Disadvantages
No antidepressant efficacy
Physiologic dependence
Sedation and coordination problems
( 2 - 4 weeks)
Subjective memory loss
Inconsistent empirical evidence
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Panic Disorder: Efficacy for Common
Comorbid Psychiatric Disorders
MAOIs
SSRIs
TCAs
BZs
Bupropion
Nefazodone
Trazodone
Venlafaxine
Mirtazepine
Type of
AgentPanic
Disorder
Social
Phobia
Major
Depression
+++
+++
+++
+++
0
+
+/-
++
+/-
+++
++
+/-
+++
?
+
?
+
?
+++
+++
+++
+/-
+++
+++
+++
+++
+++64
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Polypharmacy for Panic Disorder
Benzodiazepines
– Jitteriness, anticipatory anxiety, insomnia
Beta Blockers
– Tremor, palpitations, sweating
Bupropion
– Sexual side effects
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Panic Disorder: Definition of Response
Symptoms
– Panic attacks: at least 50% decrease
– Other PD symptoms clearly much or very much improved (anticipatory anxiety, phobic symptoms)
Time frame
– to response: 6-12 weeks
– of response: 4 -8 weeks
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Definition Remission
Full relief of symptoms
No panic attacks (or not more than 1 mild one in a 4-8 week period)
No clinically significant anxiety
No clinically significant phobic symptoms
Remission may be rare
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Panic: Inadequate or Non-response Identify element (s) unimproved
Panic attacks, avoidance, anticipatory anxiety, depression
Medication dose and duration inadequate?
– No-->Increase?
– Yes-->Augment?
– Yes-->Change?
All adequate?-->Add CBT
Reconsider diagnosis
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Panic Disorder:
Who needs Long-term Treatment? The majority of patients need long-term Rx
Relapse rates after discontinuation of medication significant
-60% within 3-4 months after stopping meds*
CBT may assist in successful discontinuation
Tapering medication should be very gradual and correlate with duration of treatment (2-6 months** )
*Relapse may be higher for BZ monotherapy
**Optimal taper may be longer after long-term BZ
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Effective Long-term Treatments
for Panic
SSRIs and other antidepressants
Preferred for long-term treatment
Benzodiazepines
Monotherapy effective; risk for emergent depression
CBT
Combination
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Benzodiazepine Pearls
Benzodiazepines
Tolerance to anxiolytic effects very
rare
Lower maintenance than acute
doses often sufficient
Abuse in anxious patients very
rare
Clinician’s confidence in his
ability to help patient
completely discontinue BZ is
critical 71
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Patients Can Discontinue BZs if: Patient is motivated and well-
informed about taper plan
Clinician concurs
No stressful events expected
Very gradual taper is used
Patient understands that
– Return of original Sx is NOT FAILURE
– Continued Rx may indicated
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BZ Taper Outcome
Panic-related symptoms which stably persist reappear during taper
– Clinically informative outcome of taper attempt
– Indicate that continued Rx necessary
Options
– Continue pharmacotherapy
– Add CBT, attempt taper again later
– Combined73
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BZ Taper Strategy
~10% reduction in dose / 2-3 wks
– No more than 25% per week
At 50% of initial dose, slow taper
Short-acting BZ: Maintain multiple daily doses to minimize plasma level fluctuations
Switch to long-acting agent may be useful but probably not necessary
CBT may enhance taper success74
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Stop taper
– May increase dose to tolerable discomfort level
Hold at same dose 2-4 weeks
– If Sx Persistent =Probably Panic-related
– If Sx gone= Probably BZ taper -related
New Sx more likely withdrawal
– Sensitivity to noise and light
– Dysesthesia, others
Recurrence of Sx during Taper
Suggested Strategy
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Is Long Term BZ for Panic
Disorder Acceptable? PDR: BZ are ok for 4 months--
– Then what???
American Psychiatric Association Formally Supports Use of Long-term BZ As Needed (Salzman)
– For Panic Disorder, GAD
– Intolerance to other meds
– Incomplete response
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Long Term BZ May Be Justified
Document rationale for long-term requirement in record
Significant other(s) can corroborate if:
– Continued benefit
– No non-medical BZ use (abuse)
– No BZ-related toxicity
Consultation from colleague to document medico-legal and clinical clarity
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If it’s anxiety look for depression
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When in doubt, treat as if
depression was imminent
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Summary
Treatment Decisions
Initial pharmacotherapy: SSRIs; start low
Start with low dose
Use ≥ 2 different SSRIs before changing classes
Utilize CBT to reduce attrition, reduce fear of bodily sensations, eliminate phobic avoidance, and facilitate discontinuation of medication
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Summary
“If it quacks like a duck and waddles, it is likely a duck.”
Panic disorder is common and disabling, and is treatable
Under-recognized and under-treated
Functional status -NOT panic attacks for outcome
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Post Lecture Exam
Question 1
1. The lifetime prevalence of panic disorder is approximately:
A. 17.1%
B. 0.7%
C. 3.5%
D. 24.9%
E. 13.3%
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Question 2
2. Which of the statements regarding panic disorder treatment is true?
A. Alprazolam is more effective for panic disorder in women than men.
B. Women exhibit a higher rate of post-treatment relapse than men.
C. Buspirone works better for panic disorder in women than for men.
D. Women with panic disorder are at greater risk for depression than men.
E. Women with panic disorder experience only unexpected panic attacks.
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Question 3
3. Compared with normals, individuals with panic
disorder are more likely to exhibit all but which
condition?
A. Migraine
B. Psoriasis
C. Hypertension
D. Irritable bowel syndrome
E. Vertigo
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Question 4
4. Which one of the following statements about co-morbidity in panic disorder is not true?
A. GAD is the most common coexisting psychiatric disorder.
B. Social phobia is the most common coexisting comorbid psychiatric disorder.
C. Approximately 30% of those seeking attention have concomitant depression.
D. Somatization co-occurs with panic disorder in up to 15%.
E. Avoidant personality disorder is the most prevalent Axis II disorder in these patients.
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Question 5
5. Which of the following statements is true regarding the use of buspirone for generalized anxiety disorder?
A. The onset of action is immediate, often as rapid as that of alprazolam.
B. Buspirone may be administered once a day.
C. Patients frequently report drowsiness and sedation.
D. Buspirone carries no risk of dependence or withdrawal symptoms.
E. Optimal response is usually achieved at a dose of 15 mg per day.
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Question 6
6. Which of the following is true regarding generalized anxiety disorder in the elderly?
A. The prevalence of generalized anxiety disorder in the elderly is low.
B. The long acting benzodiazepine diazepam is the preferable medication in these patients.
C. Hepatic clearance of anxiolytic medications is decreased in the elderly.
D. The use of TCA’s is contraindicated in the elderly.
E. Elderly patients require higher doses of buspirone in order to achieve therapeutic effect.
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Answers to Pre & Post
Competency Exams
1. C
2. B
3. B
4. C
5. D
6. C
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