Headaches Flashcards
Migraines
- Name comes from Greek hemi (_____) and kranion (head)
- Known for being _____lateral, but can be bilateral in about 40% of adults and 60% of children
- May occur with or without ____
- Typical duration of ____ to ____
- Typically a po_____, th_____, or p_______ pain
- Name comes from Greek hemi (half) and kranion (head)
- Known for being unilateral, but can be bilateral in about 40% of adults and 60% of children
- May occur with or without aura
- Typical duration of hours to days
- Typically a pounding, throbbing, or pulsating pain
Migraine Pathophysiology is complicated and includes
- Increased intracellular _______ – why (1) Rx helps
- Waves of __________ across the cerebral cortex
- (1) release à cause blood vessels to dilate which then causes the pain
- _____ cell activation (vasodilation and inflammation)
- Release of (3) by trigeminal neurons innervating the dural blood vessels – all neurotransmitters that increase pain perception. This causes these blood vessels to dilate and become inflamed.
- Although the brain _________ doesn’t have pain receptors, the CNS blood vessels do
- Overall, a lot of mechanisms that can cause Migraine which is why we have many medications to treat
- Increased intracellular calcium – why Ca channel blockers help
- Waves of depolarization across the cerebral cortex
- Nitric oxide (NO) release à cause blood vessels to dilate which then causes the pain
- Mast cell activation (vasodilation and inflammation)
- Release of calcitonin gene-related peptide (CGRP), substance P, and neurokinin A by trigeminal neurons innervating the dural blood vessels – all neurotransmitters that increase pain perception. This causes these blood vessels to dilate and become inflamed.
- Although the brain parenchyma doesn’t have pain receptors, the CNS blood vessels do
- Overall, a lot of mechanisms that can cause Migraine which is why we have many medications to treat
Migraine Without Aura
- At least __ attacks fulfilling criteria B through D
- Headache attacks lasting __ to ___ hours (untreated or unsuccessfully treated)
- Headache has at least 2 of the following characteristics:
- _______ location
2. ________ quality
- moderate or ______ pain intensity
- aggravation by or causing _______ of routine physical activity (eg, walking or climbing stairs)
- During headache at least 1 of the following:
- (1) and/or (1)
- (1) and (1)
- Not attributed to?
- At least 5 attacks fulfilling criteria B through D
- Headache attacks lasting 4 to 72 hours (untreated or unsuccessfully treated)
- Headache has at least 2 of the following characteristics:
- unilateral location
2. pulsating quality
- moderate or severe pain intensity
- aggravation by or causing avoidance of routine physical activity (eg, walking or climbing stairs)
- During headache at least 1 of the following:
- nausea and/or vomiting
- photophobia and phonophobia
- Not attributed to another disorder
Migraine With Aura
- At least __ attacks fulfilling criteria B through D
- Aura consisting of at least one of the following, but no motor weakness
- Fully reversible ______ symptoms including positive features (eg, flickering lights, spots, or lines) and/or negative features (eg, loss of vision)
- Fully reversible _______ symptoms including positive features (eg, pins and needles) and/or negative features (eg, numbness)
- Fully reversible dysphasic ______ disturbance
- At least 2 of the following:
- _______ visual symptoms and/or ___lateral sensory symptoms
- At least 1 aura symptoms develops gradually over at least 5 minutes and/or different aura symptoms occur in succession over at least __ minutes
- Each symptom lasts at least __ minutes and no longer than __ minutes
- Headache fulfilling criteria B through D for “migraine without aura” (see previous slide) begins during the aura or follows aura within 60 minutes
- Not attributed to?
- At least 2 attacks fulfilling criteria B through D
- Aura consisting of at least one of the following, but no motor weakness
- Fully reversible visual symptoms including positive features (eg, flickering lights, spots, or lines) and/or negative features (eg, loss of vision)
- Fully reversible sensory symptoms including positive features (eg, pins and needles) and/or negative features (eg, numbness)
- Fully reversible dysphasic speech disturbance
- At least 2 of the following:
- Homonymous visual symptoms and/or unilateral sensory symptoms
- At least 1 aura symptoms develops gradually over at least 5 minutes and/or different aura symptoms occur in succession over at least 5 minutes
- Each symptom lasts at least 5 minutes and no longer than 60 minutes
- Headache fulfilling criteria B through D for “migraine without aura” (see previous slide) begins during the aura or follows aura within 60 minutes
- Not attributed to another disorder
Acute Treatment of Migraines
TEN SEE V
Triptans, Ergots, NSAIDs
Steroids, Esgic, Excedrin/Acetaminophen
Valproate IV
Triptans
- _____stay*
- ____ line/most common: ______ (Imitrex)*
- Mainstay*
- First line/most common: Sumitriptan (Imitrex)*
Triptans
MOA (4)
Causes constriction of blood vessels, inhibit neurons transmission, and enhance inhibitory pain pathways – which is why it can precipitate (2)– ideal patient is someone young and with no (1)
Selective Serotonin 5-hydroxytriptamine 1B and 1D agonists
- Constriction of intracranial vessels (5-HT 1B)
- Peripheral neuronal inhibition (5-HT-1D)
- Brainstem neuronal inhibition (5-HT-1D)
- Enhancement of descending inhibitory pain pathways
Causes constriction of blood vessels, inhibit neurons transmission, and enhance inhibitory pain pathways – which is why it can precipitate heart attack and stroke– ideal patient is someone young and with no CVD
Triptans Admin Considerations
- When should the patient take the medication?
- (1) formulations take effect within 20-60min. (2) work faster
- Depending on dose and type of triptan, often may repeat dose in __-__ hours if the first does doesn’t work well enough
- Patient should take at first sign of migraine and/or migraine aura
- Oral formulations take effect within 20-60min. SC and intranasal work faster
- Depending on dose and type of triptan, often may repeat dose in 2-4 hours if the first does doesn’t work well enough
Triptans CI
- Not for _____ use
- CI in patients with or risk factors of (1)
- Should not use within 2 weeks of an (1) Rx – can precipitate serotonin syndrome (although triptan use in patients on SSRIs may be safe)
- Not for daily use
- CI in patients with CAD or risk factors of CAD
- Should not use within 2 weeks of an MAOI – can precipitate serotonin syndrome (although triptan use in patients on SSRIs may be safe)
Ergots
MOA
Serotonin agonism, but less selective than triptans
Triptans more selective and constrict cerebral blood vessels, ergots constrict all vessels
Ergots Admin Considerations
Comes in what types of formulations?
Sublingual, intransal spray, IM, SC, IV
Ergots CI
(5)-(1)**
Vascular disease
HTN
Renal failure
Hepatic failure
Pregnancy* (ergots are class D) (whereas sumatriptan is pregnancy class C)
Ergots SE
_____ SE than triptans
(1) is common
More SE than triptans (less selective)
Nausea is common
NSAIDs
Rx such as (7)
Efficacy for acute migraine tx?
Aspirin, Ibuprofen, Naproxen, Indomethacin, Diclofenac, Ketoprofen, Ketorolac
Generally good efficacy for acute migraine tx
NSAIDs Admin Considerations
In the outpatient setting, NSAIDs are a _____ expensive alternative to triptans and ergots
In the inpatient/ER setting, Rx (1) 15-60mg IV or IM often works well for acute migraine tx
In the outpatient setting, NSAIDs are a less expensive alternative to triptans and ergots
In the inpatient/ER setting, ketorolac 15-60mg IV or IM often works well for acute migraine tx
Other Analgesics
- A_______
- (1) Combination of acetaminophen, butalbital, and caffeine
- (1) Combination of acetaminophen, aspirin, caffeine
- Acetaminophen
- Esgic
- Excedrin
Acetaminophen Admin Consideration
Acetaminophen vs. other NSAIDs efficacy?
Acetaminophen often less effective than NSAIDs
Other Analgesics SE
All of these can lead to ______ (medication overuse) headaches- causes a vicious cycle, need to get off these meds
The ________ (can cause barbiturate w/drawal when getting off) in Esgic can be s______
All of these can lead to rebound (medication overuse) headaches- causes a vicious cycle, need to get off these meds
The butalbital (can cause barbiturate w/drawal when getting off) in Esgic can be sedating
Steroids
Rx (1) Dose Pack
Used for migraines that?
Medrol (Methylprednisolone) Dose Pack
Used for migraines that just won’t go away
Steroids Admin Considerations
- Dosing
- Day 1: __mg
- Day 2: __mg
- Day 3: __mg
- Day 4: __mg
- Day 5: __mg
- Day 6: __mg
- A large (but non-blinded and non-randomized) study showed benefit to a short course of oral prednisone for (1) in medication overuse HA
- Dosing
- Day 1: 24mg
- Day 2: 20mg
- Day 3: 16mg
- Day 4: 12mg
- Day 5: 8mg
- Day 6: 4mg
- A large (but non-blinded and non-randomized) study showed benefit to a short course of oral prednisone for analgesic detoxification in medication overuse HA
- Pts were instructed to gradually taper off of their analgesic over a 7d period.
- Days 1-2: pred 60mg/day, Days 3-4: pred 40mg/day, Days 5-6: pred 60mg/day
- Ranitidine 300mg/day for all 6 days of steroids
- Start of the headache prophylactic medication on day 7
IV Valproate
_____ opinions/evidence. Some studies have shown IV valproate to be more effective than DHE plus metoclopramide for acute migraine, while other studies have not shown this.
HA relief has been shown to take effect anywhere from __ hour to ___ hours after infusion
Mixed opinions/evidence. Some studies have shown IV valproate to be more effective than DHE (ergotamine) plus metoclopramide for acute migraine, while other studies have not shown this.
HA relief has been shown to take effect anywhere from one hour to 24 hours after infusion
IV Valproate Admin Considerations
Dosing =
Typically used for (2) but used commonly in _______ settings/as _____ medication
500mg IV once (Diluted in 5mL of NS, given over 15-30min)
Typically a antiepileptic/mood stabilizer but used commonly in emergency settings/as rescue medication
IV Valproate
SE
Generally well tolerated
However has many SE (decreased bone density (fracture risk), liver dysfunction, etc)
Acute Treatment of Migraines
First line is usually at (1) - but if the patient has CAD then use (2)
Triptan -> Analgesics/Esgic
Migraine Prophylaxis Treatment
Gi_VVV_ TPA Before _C_risis
Gabapentin
Verapamil
Venlafaxine XR
Valproate
Topiramate (Topamax)
Propranolol
Amitriptyline
Botox
CGRP Inhibitors (Erenumab (Aimovag), Galcanezumab (Emgality))
Topiramate (Topamax) Dosing
=
Target dose =
Start with 25mg once daily, and increase weekly by 25 mg/day up to a target dose of 50mg twice a day
Topiramate SE
(4) - (1)*
Weight loss – avoid in thin pts
Word finding difficulties
Paresthesias
Kidney stones*
Topiramate Efficacy
Efficacy?
Often can help with other comorbidities (3)
Highly efficacious at preventing migraines
- Obesity
- Epilepsty
- Essential tremor
Propranolol Dosing
(1)
- Start with 80 mg/day divided every 6-8 hours.
- Increase by 20-40 mg/dose every 3-4 weeks to effective dose.
- Maximum dose for migraine prophylaxis is 240 mg/day given in divided doses every 6-8 hours.
(1)
- Start with 80 mg once daily.
- Maximum dose for migraine prophylaxis is 240 mg once daily
Regular Release
- Start with 80 mg/day divided every 6-8 hours.
- Increase by 20-40 mg/dose every 3-4 weeks to effective dose.
- Maximum dose for migraine prophylaxis is 240 mg/day given in divided doses every 6-8 hours.
Long Acting Formulation
- Start with 80 mg once daily.
- Maximum dose for migraine prophylaxis is 240 mg once daily
Propranolol
Efficacy?
Vs other beta blockers?
Highly efficacious at preventing migraines, and propranolol is more efficacious than other beta blockers
If pt has migraines and already on a BB for heart disease – try to switch to propranolol