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Transcript of MIGRAINE IN PRIMARY CARE ADVISORS Vienna, 25 October 2002, 2-6 pm Individualising migraine care: The...
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MIGRAINE IN PRIMARY CARE ADVISORS
Vienna, 25 October 2002, 2-6 pm
Individualising migraine care:The clinical relevance of providing different
modes of administration of antimigraine drugs
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Introduction and objectives
Dr Andrew Dowson
Kings’ Headache Service, London
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Programme
• Dr Andrew Dowson: Introduction and objectives
• Dr Trevor Rees: Modes of administration of available antimigraine drugs: a review of their strengths and weaknesses
• Dr Bruce Charlesworth: The clinical profile of the conventional tablet, orally dispersible tablet and nasal spray formulations of zolmitriptan (Zomig®)
• Break
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Programme
What factors should be considered in the choice of formulation to be used for antimigraine therapies?
• Dr Andrew Dowson: Selection of initial therapy
• Dr Sue Lipscombe: Follow-up care: monitoring treatment and selection of therapy
• General discussion
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Objectives of today’s meeting
• Review available formulations of antimigraine drugs– Emphasis on the triptans
• Review the clinical profile of the Zomig formulations
• Agree on concepts of individualisation of care for migraine
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Objectives of today’s meeting
• Review the factors that should be evaluated in choosing the appropriate formulation for each patient
• Develop recommendations for the prescription of different triptan formulations in primary care
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Outputs from the project
• Article to be published in a learned journal
• MIPCA newsletter (‘popular’ GP version)
• Slide set for educational purposes
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Modes of administration of available antimigraine drugs: a review of their strengths
and weaknesses
Dr Trevor Rees
Hawthorns Surgery, Sutton Coldfield
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Overview
• Available drugs and formulations in the UK
• Review of clinical profile of different triptan formulations– Relative strengths and weaknesses
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Available drugs and formulations in the UK
OTC acute medications
• Simple analgesics/NSAIDs and combination medications (e.g. Solpadeine)– Conventional tablets– Dispersible tablets
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Available drugs and formulations in the UK
Prescribed acute medications• NSAIDs
– Conventional tablets
• Analgesic-anti-emetic combinations– Tablets / dispersible tablets
• Analgesic-isometheptene combinations (Midrid)– Capsules
• Analgesic-codeine combinations (Migraleve)– Tablets
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Available drugs and formulations in the UK
Prescribed acute medications
• Triptans– Conventional tablets (all)– Orally dispersible tablets (Zomig, Maxalt)– Nasal sprays (Imigran, Zomig)– Subcutaneous injection (Imigran)
• Ergotamine– Conventional tablets (Cafergot / Migril)
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Available drugs and formulations in the UK
Prescribed prophylactic medications
• Beta-blockers– Conventional tablets, sustained-release
capsules, oral solutions
• Serotonin antagonists
• Anticonvulsants
• Antidepressants– All conventional tablets
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Clinical profiles of the different triptan formulations
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Conventional tablets
• Generally well absorbed from the intestine• Effective therapy
60% of patients with headache relief after 2 hours
• Onset of action within 30-60 min• Generally well tolerated• Differences between the triptans are
generally small and of uncertain clinical significance
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
Dowson AJ, Cady RK. Rapid Reference to Migraine, 2002
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Conventional tablets: Efficacy
0
10
20
30
40
50
60
70
80
90
Sum100
Sum50
Nara2.5
Zolm2.5
Riz 10 Almo12.5
Ele 40
Pat
ien
ts (
%)
Proportion of patients with headache relief after 2 hours (maximum published values)
Dowson AJ, Cady RK. Rapid Reference to Migraine, 2002
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Orally dispersible tablets
• Generally well absorbed from the intestine
• Effective therapy 60% of patients with headache relief after
2 hours
• Onset of action within 30-60 min• Generally well tolerated• Similar clinical profile to conventional
tablet formulationsSheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
Dowson AJ et al. Cephalalgia 2001;21:419-20
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ODT tablets: Efficacy
0
10
20
30
40
50
60
70
80
90
Zolmitriptan Rizatriptan
Tablet
ODT
Pat
ien
ts (
%)
Proportion of patients with headache relief after 2 hours (maximum published values)
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
Dowson AJ et al. Cephalalgia 2001;21:419-20
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Nasal sprays
• Well absorbed from the nasal mucosa, but some also absorbed from the intestine
• Effective therapy– Up to 70% of patients with headache relief after 2
hours
• Rapid onset of action: within 15 min• Generally well tolerated, with some reports of
taste disturbances• May have superior clinical profile to oral
formulations
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
Purdy A et al. Cephalalgia 2001;21:418-9
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Nasal sprays: Efficacy
0
10
20
30
40
50
60
70
80
Zolmitriptan Sumatriptan
Nasal spray
Oral
Pat
ien
ts (
%)
Proportion of patients with headache relief after 2 hours (maximum published values)
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
Purdy A et al. Cephalalgia 2001;21:418-9
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Sumatriptan subcutaneous injections
• Very rapid absorption• Most effective therapy
– >80% of patients with headache relief after 2 hours
• Very rapid onset of action: within 10 min• Has superior efficacy profile to all other
formulations• Has more associated side effects than all
other formulations
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
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Subcutaneous sumatriptan: Efficacy
0
10
20
30
40
50
60
70
80
90
Subcut 6 mg Nasal spray 20mg
Oral 100 mg
Pat
ient
s (%
)
Proportion of patients with headache relief after 2 hours (maximum published values)
Sheftell FD, Fox AW. Cephalalgia 2000;20(Suppl2):14-24
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Strengths and weaknesses of different triptan formulations
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Strengths• Familiarity/comfort• Most drugs well
absorbed from intestine• Clinical studies show
that triptan tablets provide effective migraine relief
• Well tolerated• Relative cost
Weaknesses• Need water for use• Gastric stasis
associated with migraine
• May not be effective for some patients/ attacks
• Slower onset of action (30-60 min)
Conventional tablets
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Strengths• Innovative migraine
treatment• Flexible use: No need
for water• Generally well absorbed
from intestine• Clinical studies show
that ODT triptans are effective for migraine
• As well tolerated as conventional tablets
• Relative cost
Weaknesses• Not familiar• Gastric stasis
associated with migraine
• May be no more effective than conventional tablets
• May not be effective for some patients/ attacks
• Slower onset of action• Not absorbed from
mouth
Orally dispersible tablets (ODT)
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Strengths• Innovative migraine
treatment• Flexible use: No need
for water• Good nasal absorption • Rapid onset of action
(15 min)• May be more effective
than tablet formulations• As well tolerated as
conventional tablets
Weaknesses• Not familiar• Some absorption may
occur in the stomach• May not be effective for
some patients/ attacks• Some reports of taste
disturbances
Nasal sprays
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Strengths• Innovative migraine
treatment• Flexible use: No need
for water • Fastest onset of action
(10 min)• More effective than all
other formulations• Non-needle injectors on
horizon
Weaknesses• Fear of injections• More side effects than
with other formulations• Some side effects may
be disturbing to the patient and restrict use
• Relative expense
Subcutaneous injection
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Conclusions
• All triptan drugs and formulations are effective and well tolerated acute treatments for migraine
• Triptans are the ‘gold standard’ treatment• Different triptan formulations have their own
strengths and weaknesses• The choice of triptan formulation may not be
obvious from the outset• Guidance to help the physician choose an
appropriate formulation for each patient would be welcome
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What factors should be considered in the choice of formulation to be used for
antimigraine therapies?
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Selection of initial therapy
Dr Andrew DowsonKings’ Headache Service, London
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New MIPCA guidelines for migraine management
Individualising care processes:Initial consultation and
treatment
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Detailed history, patient education and buy-inDiagnostic screening and differential diagnosisAssess illness severity
Attack frequency and durationPain severityImpact (MIDAS or HIT questionnaires)Non-headache symptomsPatient history and preferences
Intermittentmild-to-moderate migraine
(+/- aura)
Intermittentmoderate-to severe migraine
(+/- aura)
Aspirin/NSAID (large dose)Aspirin/paracetamol plus anti-emetic
Oral triptan
Nasal spray/subcutaneous triptan
Initial consultation
Initial treatment
Rescue
Rescue
Behavioural/complementary therapies
Copyright MIPCA 2002, all rights reserved
Dowson AJ et al. Curr Med Res Opin 2002;18: in press.
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Detailed history, patient education and buy-inDiagnostic screening and differential diagnosisAssess illness severity
Attack frequency and durationPain severityImpact (MIDAS or HIT questionnaires)Non-headache symptomsPatient history and preferences
Intermittentmild-to-moderate migraine
(+/- aura)
Intermittentmoderate-to severe migraine
(+/- aura)
Aspirin/NSAID (large dose)Aspirin/paracetamol plus anti-emetic
Oral triptan
Nasal spray/subcutaneous triptan
Initial consultation
Initial treatment
Rescue
Rescue
Behavioural/complementary therapies
Copyright MIPCA 2002, all rights reserved
Dowson AJ et al. Curr Med Res Opin 2002;18: in press.
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Assess illness severity
• Attack frequency and duration• Pain severity• Impact on daily living
– MIDAS/HIT questionnaires
• Non-headache symptoms• Patient factors
– History, preference and other illnesses
Matchar DB et al. Neurology 2000; www.aan.com. Bedell AW et al. Primary Care Network 2000.
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Assessment of severity
Mild-to-moderate migraine Moderate-to-severe migraine
Headaches mild-to-moderate in intensity
Headaches moderate or severe in intensity
Non-headache symptoms not severe in intensity
Significant non-headache symptoms, possibly severe
Impact not significant:
MIDAS Grade I or II
HIT Grade 1 or 2
Significant impact:
MIDAS Grade III or IV
HIT Grade 3 or 4 Matchar DB et al. Neurology 2000; www.aan.com.
Bedell AW et al. Primary Care Network 2000.
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Selection of initial therapy
Evidence-based medicine (Duke database) suggests:
• Behavioural therapy recommended for all• Acute therapy recommended for all• Prophylactic therapy recommended for
certain patients• Complementary therapies may be useful as
adjunctive therapy
Headache Consortium. Neurology 2000; www.aan.com. Bedell AW et al. Primary Care Network 2000.
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Goals of therapy
• Acute medications: to rapidly relieve the headache and other symptoms, and permit the return to normal activities (within 2 hours?)
• Prophylactic medications: to reduce headache frequency by >50%
Matchar DB et al. Neurology 2000; www.aan.com.Bedell AW et al. Primary Care Network 2000.
Ramadan NM etal. Neurology 2000; www.aan.com.
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Strategy for providing initial acute therapy in individualised care
Migrainediagnosis
Severityassessment
Mild to moderate migraine Moderate to severe migraine
Initial therapy Initial therapy
Rescue Rescue
If unsuccessful
Migraine attack
Dowson AJ et al. Curr Med Res Opin 2002;18: in press
Stratified care
Staged care
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Recommended initial acute treatments
Mild-to-moderate migraine
• Aspirin or NSAIDs (high doses)
• Aspirin/paracetamol plus anti-emetics
• Paracetamol plus isometheptene– Use if possible before headache starts
• Rescue medications– Oral triptans– Use for any headache severity
Matchar DB et al. Neurology 2000; www.aan.com.
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Recommended initial acute treatments
Moderate-to-severe migraine
• Oral triptans (tablet/ODT)– Use after the headache starts, if possible
when it is mild in intensity
• Rescue medications– Nasal spray or subcutaneous triptans– Symptom control
Matchar DB et al. Neurology 2000; www.aan.com.
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Who should receive a triptan as initial therapy?
• Patients with moderate-to-severe migraine
• Patients with any severity migraine who have failed on other acute medications
Matchar DB et al. Neurology 2000; www.aan.com.
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What formulation of triptan should be used as initial therapy?
• Is a conventional tablet always the best choice?
• Would ODT formulations be more appropriate?
• Should any patients receive nasal spray or subcutaneous formulations from the outset?
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Circumstances where ODT or non-oral formulations may be appropriate
• ODT / nasal– Unpredictable attacks– Need for greater convenience– Patient preference
• Nasal / subcutaneous– Severe / fast onset attacks– Need for rapid response– Severe nausea– Vomiting– Patient preference
Dowson AJ et al. Curr Med Res Opin 2002;18: in press
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What formulation of triptan should be used as rescue therapy?
• Second dose of initial medication?
• Alternative oral triptan?
• ODT formulation?
• Nasal spray?
• Subcutaneous injection?
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Factors affecting the choice of rescue medication
• Impact
• Work / lifestyle pressures
• Severity of attack
• Length of attack
• Vomiting / severe nausea
• Patient preference
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Patient preference factors: What do patients experience?
• Headache relief too slow
• Inadequate overall relief
• Inconsistency of response
• Headache returns after initial relief
• Too many side effects
Lipton RB, Stewart WF. Headache 1999;39(Suppl2):20-6
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What do patients want? How do they express their preferences?
• Greater speed of action
• Enhanced overall effectiveness
• Restored ability to function
• Fewer side effects
• Satisfaction with therapy
• Greater convenience
Dowson AJ, manuscript in preparation
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Strategy for providing prophylactic medications in individualised care
• Prophylactic medications should be provided:– For patients with frequent, high-impact migraine
attacks (4/month?)– Where acute medications are ineffective or
precluded by safety concerns– For patients who overuse acute medications
and/or have CDH– For patients with the rare migraine variants
• However: acute medications should also be provided for breakthrough attacks
Ramadan NM et al. Neurology 2000; www.aan.com. Bedell AW et al. Primary Care Network 2000.
Dowson AJ et al. MIPCA 2000.
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Recommended initial prophylactic treatments
• First-line medications:– Beta-blockers (propranolol, metoprolol,
timolol, nadolol)– Anticonvulsants* (sodium valproate)– Antidepressants* (amitriptyline)
• Second-line medications– Serotonin antagonists (pizotifen,
methysergide, cyproheptadine)
* Not licensed for migraine in the UK
Ramadan NM et al. Neurology 2000; www.aan.com.
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Factors influencing the choice of initial prophylactic medication
• Side effects mean that certain patients are not able to take specific drugs– Beta-blockers may not be suitable for
sportspeople• Weight gain experienced with many drugs
may limit compliance in a largely female population
• Anticonvulsants and antidepressants may be used for patients with concurrent conditions
• Anticonvulsants and antidepressants are also effective if CDH is suspected
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Conclusions
• The choice of initial drug can be individualised for each patient’s needs
• Oral triptans are suitable acute medications for most patients
• ODT, nasal spray and subcutaneous triptans are suitable initial medications for certain patients and/or as rescue medication
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Follow-up care: monitoring treatment and selection of therapy
Dr Sue LipscombePark Crescent New Surgery, Brighton
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New MIPCA guidelines for migraine management
Follow-up treatment
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Aspirin/NSAID (large dose)Aspirin/paracetamol plus anti-emetic
Oral triptan
Initial treatment
Follow-up treatment
Oral triptanAlternative oral triptan
Nasal spray/subcutaneous triptan
Rescue
If unsuccessful
Consider prophylaxis +acute treatment for
breakthrough migraineattacks
Frequent headache(i.e. 4 attacks per month)
Consider referralChronic daily
Headache (CDH)?
Migraine
If unsuccessful
If unsuccessful
Initial treatmentCopyright MIPCA 2002, all rights reserved
If management unsuccessful
Dowson AJ et al. Curr Med Res Opin 2002;18: in press.
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Aspirin/NSAID (large dose)Aspirin/paracetamol plus anti-emetic
Oral triptan
Initial treatment
Follow-up treatment
Oral triptanAlternative oral triptan
Nasal spray/subcutaneous triptan
Rescue
If unsuccessful
Consider prophylaxis +acute treatment for
breakthrough migraineattacks
Frequent headache(i.e. 4 attacks per month)
Consider referralChronic daily
Headache (CDH)?
Migraine
If unsuccessful
If unsuccessful
Copyright MIPCA 2002, all rights reserved
If management unsuccessful
Dowson AJ et al. Curr Med Res Opin 2002;18: in press.
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Recommended follow-up procedures
• Instigate proactive long-term follow-up procedures
• Monitor the outcome of therapy– Headache diaries– Impact questionnaires (MIDAS/HIT)
• Make appropriate treatment decisions
Dowson AJ et al. Curr Med Res Opin 2002;18: in press
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Who are the diaries for?
• The patient
• The doctor
• Both
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What is the diary for?
• Recording data– Triggers, patterns, results of medication,
frequency of medication taken
• To make the patient feel the doctor is interested
• To help the doctor make lifestyle and medication suggestions
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Headache diaries
• Beneficial for the prospective management of migraine
• Two types of diary can be used– Patient-held long-term diary for continual use,
containing basic information on patterns of headache
– Short-term diary used over a specific timescale for intense monitoring
• The two diaries can be used in tandem• Data from the diaries can be used to
individualise follow-up treatment decisions
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Follow-up treatment decisions
• Acute medications– Patients effectively treated should
continue with the original therapy• Analgesic-based medications• Triptans
– Patients who fail on original therapy should be offered other therapies, based on clinical issues and patient preference
• Analgesic-based medications oral triptan• Triptan alternative triptan
Dowson AJ, Cady RC. Rapid Reference to Migraine 2002.
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Individual treatment for individual attacks
• Doctor and patients may be able to identify different severities and types of attacks
• The patient may choose to have a range of treatments to hand to treat each attack with the medication they feel most appropriate
• If this is the case, then several prescriptions may be necessary
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Switching between triptans
• If one oral triptan fails, an alternative oral triptan may be effective– ODT triptan may be suitable for patients
who cannot predict their attacks easily and/or require greater convenience of use
• Patients needing rapid onset of action and greater convenience of use may benefit from nasal spray and injection formulations
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Switching between triptans
• Patients needing greater overall relief and/or experiencing significant impact may benefit from nasal spray or subcutaneous formulations
• Patients reporting bothersome side effects may require a triptan with a better tolerability profile
• ODT, nasal spray and subcutaneous formulations may also be suitable as rescue medications
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Follow-up treatment decisions
• Prophylactic medications– Initial dose can be titrated up as necessary
to achieve an effective dose– Medication needs to be provided for an
adequate time period (up to 3 months)– If effective, treatment can continue for 6
months, after which it may be stopped– If ineffective, another prophylactic
medication may be tried– Monitor closely for side effects and
patients’ subjective impressionsDowson AJ et al. Curr Med Res Opn 2002;18: in press
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Follow-up treatment decisions
• Specialist referral – Migraine patients refractory to repeated
acute and prophylactic medications– Patients who have developed CDH during
treatment– Patients suspected of having sinister
headaches, rare migraine variants, cluster headache and other refractory non-migraine headaches
– Patient request
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Specialist referrals
• Worrying migraine – are they TIAs or hemiplegic migraine?
• Worrying times – pregnancy, breast feeding, menopause
• For specialist treatment only, e.g. methysergide, botox, off-licence drugs.
• For special investigations – CT, MRI
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Conclusions
• Follow-up should be available for migraine patients– Headache diaries– Impact questionnaires
• Acute and prophylactic medications can be changed to maximise therapeutic effect and patient satisfaction
• The different triptan formulations provide flexible therapy that can be targeted to each patient’s needs and desires