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Refractory HeadacheChallenges and Strategies
David W. Dodick, M.D.
Department of Neurology
Mayo Clinic
Phoenix Arizona USA
Headache Masters School, Tokyo 2013
• Definition of refractory/intractability depends on:
• Who you are: primary care physician, neurologist,
headache specialist
• Where you are: availability of people (other
disciplines), resources (health system), therapeutic
options
• What your/patient expectations are: cure, improved
function, quality of life
Headache 2010;50:1499-1506
SATISFACTION =EXPECTATIONS
REALITY
--------
1. We missed something
a. Wrong diagnosis
b. Exacerbating factor
c. Inadequate treatment
2. Patients is refractory
WHY HEADACHE MAY BE REFRACTORY
SECONDARY DIAGNOSIS IS MISSED
Lifetime
migraine
prevalence
43%♀ and
18%♂
Reason 1: Many patients with Secondary Headache Will Have History of Primary Headache Disorder
Lifetime TTH
78% (♀>♂)
Frequency and duration 5 attacks lasting 4-72 hours
Pain criteria: 2 of the following 4
Unilateral
Pulsating
Moderate or severe intensity
Aggravation by routine physical activity
Associated symptoms: 1 of the following
Nausea and/or vomiting
Photophobia and phonophobia
Not attributable to another disorder
Often
forgotten
Lack
specificity
Reason 2: Many Patients with Secondary Headache will have Migraine or Tension-type Phenotype
77% of patients with headache
secondary to brain tumor
meet ICHD criteria for tension-
type headache (Forsythe and
Posner Neurology 1992)
New-onset chronic tension-type
headache is a diagnosis of
exclusion
Systemic symptoms (fever, weight loss) or
Secondary risk factors (HIV, cancer)
Neurologic symptoms (or signs)
Onset: abrupt, peak <1 min
Older: >50 (GCA; glaucoma, cardiac cephalgia )
Previous headache history (new or change in pattern/progression)
Postural (worse in upright/supine position)
Precipitated by Valsalva (exertion)
Pulsatile tinnitus (diplopia, transient visual obscurations)
Reason 3: Warning symptoms not elicitedSNOOP4 Red Flags
Dodick DW. Seminars in Neurology 2010;30(1):74-81
Reason 4: Relying on CT to rule out secondary causes of headache
Reason 4: Wrong Imaging Test! Secondary causes of headache missed on CT Head
o Pressure
• CSF Leak (SIH)
• Intracranial hypertension
o Infections
• Meningoencephalitis
• Cerebritis and brain abscess
o Neoplastic disease
• Parenchymal and extra
axial neoplasms (especially
posterior fossa)
• Meningeal carcinomatosis
• Metastatic brain tumors
• Pituitary lesions
PIN the secondary diagnosisSIH=spontaneous intracranial hypotension
Reason 5: Wrong Imaging TestVascular imaging not performed
WHY HEADACHE MAY BE REFRACTORY
PRIMARY DIAGNOSIS IS MISSED
Only 45%
see an HCP
Only 39%
diagnosed by
an HCP
Of 775
patients
meeting EM
criteria
Only 26%
receive
treatment
Only 41%
see an HCP
Only 11%
diagnosed by
an HCP
Of 1254
patients
meeting CM
criteria
Only 4.5%
receive
treatment
Diagnosis of Migraine (EM/CM) in US Practices
Only 10% of HCP consult a neurologist and
4% consult a specialist
Lipton RB, et al. Headache 2013;51:81-92. Dodick DW, Headache 2016;56:821-834
Diagnosis of primary headache disorder
• Know the criteria for migraine, tension-type, and cluster headache
• Use a systematic approach to history taking
• Location (if unilateral, is it side-locked)
• Cranial autonomic features
• Diurnal variation (nocturnal, awakening)
• Frequency and duration of individual episodes
• Monthly Frequency of headache days
• Remitting or unremitting pain
Why is Migraine Frequently Mistaken For Tension-Type Headache (TTH)?
• Guilt by location: Neck pain (75%) and
bilateral headache (40%)
• Guilt by association: Stress (as trigger)
comorbid anxiety/depression
• TTH overrides probable migraine
(ICHD needs refinement; TTH should
have no associated symptoms)
Why is Migraine Frequently Mistaken for Sinus Headache?
• Pain often located over sinuses
• Migraine often triggered by
weather changes
• Tearing/nasal congestion
common (up to 50%)
• Resolution attributed to sinus
medication
1. We missed something
a. Wrong diagnosis
b. Exacerbating factor
c. Inadequate treatment
2. Patients is refractory
Exacerbating factors
• Medications (e.g. dipyridamole, SSRI)
• Acute medication overuse
• Estrogen (COC, HRT, menopause)
• Dietary or lifestyle factors
• Occupational or environmental
• Comorbid illness/condition (psychiatric, obesity, obstructive sleep apnea)
1. We missed something
a. Wrong diagnosis
b. Exacerbating factor
c. Inadequate treatment
2. Patients is refractory
WHY HEADACHE MAY BE REFRACTORY
PHARMACOTHERAPY IS INADEQUATE
©2013 MFMER | slide-22
Acute Treatment ‘Fails’
Recurrence, partial or inconsistent response• Early Rx (while pain is mild)• Increase dose• Combination Rx (triptan+NSAID)
• Switch drug or route of administration
Overuse• Establish use limits• Consider prevention
Becker WB. Continuum 2015;21:953-972
WHY HEADACHE MAY BE REFRACTORY
COMPLIANCE
©2013 MFMER | slide-24
19%
21%
31%29%
33%
23%
36%
24%
29%
24%
32%
28%
16%
20%
26%
10% 10%
17%
14%
17%
10%
19%
13%
18%
12%
21%
16%
8%
11%
14%
0%
5%
10%
15%
20%
25%
30%
35%
40%
Amitr
ipty
line
N=1,
164
Nor
trip
tylin
e N=
653
Cita
lopr
am N
=1,1
50
Sert
ralin
e N=
622
Fluo
xetin
e N=
421
Paro
xetin
e N=
190
Venl
afax
ine
N=27
7
Prop
rano
lol N
=699
Met
opro
lol N
=395
Nad
olol
N=1
10
Aten
olol
N=1
95
Topi
ram
ate
N=2,
604
Gaba
pent
in N
=860
Diva
lpro
ex N
=292
Tota
l N=9
,632
Antidepressants Beta Blockers Anticonvulsants AllClasses
Prop
ortio
n of
Pat
ient
s Per
siste
nt Persistent At 6 Months Persistent at 12 Months
Hepp Z, et al. Cephalalgia 2015;35:478-488
86% discontinue at
12 months
Improving compliance
• Start very low, go very slow (e.g. topiramate 15mg q2 wks)
• Combination therapy
• One drug for two diseases not always optimal (e.g. tricyclic in patient with migraine and depression)
• Minimize dose/side effects; maximize efficacy with different MOA
• Beware the claim of ‘tachyphylaxis’
• Always have side effect discussion
• Always set expectations for efficacy
Dodick DW, Silberstein SD. Practical Neurology 2007;46:1-13
Preventive medication side effects
• Expect them
• Many attenuate/resolve over time
• Some may be attenuated (selenium for divalproex induced
hair loss (200-400ug) potassium for topiramate induced
paresthesias (20-40mEq/day)
-14
-12
-10
-8
-6
-4
-2
00 4 8 12 16 20 24 28 32 36 40 44 48 52 56
Head
ach
e D
ays/2
8 D
ays
p<0.001p<0.001
p<0.001
p<0.001
p<0.001
Week 24
Primary Endpoint
p<0.001
p<0.001p=0.008
p=0.01p=0.007
p=0.019
p=0.047
p=0.011
p=0.019
Head
ach
e D
ays/2
8 D
ays
(Mean
Ch
an
ge F
rom
Base
lin
e)
Week:
Efficacy is cumulative and takes time
Onset of effect Maximal effect
◄ January ~ February 2012 ~ March ►
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 Severe
Moderate
Mild
Effective prevention may be reduction in severity and not frequency
◄ January ~ February 2012 ~ March ►
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 Severe
Moderate
Mild
Effective prevention may be reduction in severity and not frequency
WHY HEADACHE MAY BE REFRACTORY
PHARMACOLOGIC RANGE OF OPTIONS NOT EXPLORED
©2013 MFMER | slide-31
Migraine Preventive Medications
(Guidelines and Beyond)
Silberstein et al., Neurology 2012Holland et al., Neurology 2012Silberstein SD. Continuum 2015;21:973-989
Others:• Memantine
• Lisinopril
• Candesartan
• Amiloride
• Duloxetine
• Zonisamide
• Simvastatin + vitamin D
• Verapamil
• Flunarizine
Onabotulinumtoxin A*
* For chronic migraine
Blumenfeld A. et al. Headache 2010;50:1406-1418)
155 Units-31 injection sites
Injection Therapy
Blumenfeld A, et al. Headache 2013;53:437-446)
Injection Therapy: Trigger Point Injections
Robbins M., et al. Headache 2014;54:1441-1459
NON-INVASIVE NEUROMODULATION THERAPIES
Supraorbital nerve stimulation
Single pulse TMSVagal nerve stimulation
Refractory Headache: Infusion Center and Inpatient Treatment Protocols
• Repetitive IV infusions for 3-5 days
• Dihydroergotamine 0.5 - 1.0mg plus
antiemetic
• Divalproex sodium 6.4 mg / kg
• Methylprednisolone 250-500mg or
Dexamethasone 4-8mg Q12h
• Magnesium sulfate 1gram q 24h
• Ketorolac 30mg Q12-24h
• Diphenhydramine 50mg
• Lorazepam 0.5mg
WHY HEADACHE MAY BE REFRACTORY
NON-PHARMACOLOGIC RANGE OF OPTIONS NOT EXPLORED
©2013 MFMER | slide-38
Complementary and Alternative Medicine
200mg bid
Level B300 mg
Level B
3-25mg
300mg daily
Level C
0.2-0.6mg
Level B
Silberstein et al., Neurology 2012Holland et al., Neurology 2012
Multidisciplinary integrated headache care
PsychiatryPsychology
CBT/BiofeedbackNeurology
Sleep physiologyPMRAcupuncture
Women’s Health Specialist
Integrative medicine specialist(meditation, yoga,
message)
Headache nurse specialist
Exercise physiologyDietician
WHY HEADACHE MAY BE REFRACTORY
HEADACHE/PATIENT IS TRULYREFRACTORY
©2013 MFMER | slide-41
• Primary Goal: Restore function when pain cannot be eliminated
• Requires willingness to withdraw from opioids or other analgesics
• Develop treatment goals that include an active lifestyle
• Behavioral strategies of goal setting, paced activity, improved
physical conditioning, decreased pain avoidance, stress
management
Bruce B., et al. Curr Pain Head Reports 2009;13:67-72
Typical patient
• Significant functional decline, extremely debilitated, unable to be
employed or function in home setting
• Medication overuse, demoralization, depression, anxiety
• High medical utilizers: failed medication trials, surgery, injections,
implantable technology, extensive and varied physical therapy programs,
psychiatric and psychological care
Bruce B., et al. Curr Pain Head Reports 2009;13:67-72
Chronic Pain Rehabilitation3-week outpatient day or
inpatient treatment program
PsychiatryPsychology
Occupational therapists
Social Work
Vocational rehabilitationalPhysical therapists
PharmacistsChaplainsNursing
Chemical dependency counselors
Dietician
Bruce B., et al. Curr Pain Head Reports 2009;13:67-72
3-week intensive hospital-based
outpatient treatment program
N=195Mean duration = 10.8 years44% MOH52% major depression
Pain severity (p<0.001)
Depression (p<0.001)
Physical functioning (p<0.001)
General activity level (p<0.001)
House, work, social activities (p<0.001)
Interference of pain in life (p<0.001)
Pain catastrophizing (p<0.001)
Bruce B., et al. Curr Pain Head Reports 2009;13:67-72
1. We missed something
a. Wrong diagnosis
b. Exacerbating factor
c. Inadequate treatment
2. Patients is truly refractory
In my practice
>80%
Assuming appropriate expectations
<20%
ありがとうございました