Treatment of HAs Flashcards
Used in prophylaxis of migraines Take 3 weeks to be effective Mechanism is unclear Reduced energy, tiredness contraindicated in pts with asthma
Beta blockers
Propranolol and Atenolol
propane and antenna lol’ing
Prophylaxis of migraines
mechanism unclear
Inhibit serotonin reuptake
cause weight gain and tiredness
TCAs
amitriptyline and nortriptyline
“ami and nora tripped and fell on their heads”
Px of migraines
MOA unclear, increase GABA signaling
Anticonvulsants
Valproic acid, topiramate, gabapentin, Levetriracetam
Contraindicated in pregnancy due to teratogenicity
causes drowsiness, nausea, ataxia, alopecia, tremor, and liver toxicity
Valproic acid
calcium channel blocker
antihypertensive, Px of migraines
MOA unclear
negative inotropic effects and hypotension
Verapamil
Px of migraines
histamine antagonist
Ach and serotonin antagonist
used for seasonal allergy and pruritus
Cyproheptadine
mild to moderate migraine abortion
nonspecific pain reduction agents
(4 examples)
NSAIDs, Ibuprofen, naproxen, acetaminophen, ketorolac
mild to moderate migraine abortion
combined with caffeine to increase efficacy
acetaminophen, aspirin, ibuprofen, naproxen
moderate migraine abortion
nonspecific pain reduction agent
given IV or PO for max 5 days
ketorolac
which two nonspecific agents are given to children and pregnant women to stop migraines?
which nonspecific agent should be avoided during the last trimester of pregnancy?
acetaminophen and ibuprofen
NSAIDs because they close ductus arteriosus and increase bleeding
Migraine abortive therapy
agonist at 5-ht1 receptors
partial agonist and antagonist at serotonergic, dopaminergic, and adrenergic receptors
very widespread side effects, causing nausea and vasoconstriction
ergot alkaloids
which ergot is given sublingual?
ergotamine
ergot, it’s mine. i’m hiding it under my tongue.
which ergot is given sc, im, iv, or nasal spray?
dihydroergotamine
this ergot is also mine, but i can take it in a variety of ways.
contraindications for ergotamine and dihydroergotamine
pregnancy X (fetal stress, miscarriage, vasoconstriction)
peripheral vascular disease
ischemic heart disease
within 24 hours of triptans
migraine abortive therapy
causes less vasoconstriction and nausea than ergots
selective MOA: 5-HT1 receptor agonism
triptans
Triptan effects:
vascular
neurogenic
central
- vasoconstriction of cranial blood vessels
- reduction of trigeminal sensory nerve activation and inhibition of vasoactive neuropeptide release
- inhibition of NT release from trigeminal nerves in the brainstem and upper cervical spine
short onset triptan
sq, PO, or nasal spray
sumatriptan
sumo tripped and fell on your head
greater bioavailability than sumatriptan
lipophilic and greater CNS distribution
P450 metabolism
lower dose in renal dysfunction
noratriptan and zolmitriptan
Nora’s ohms. Imagine nora tripping and getting upset, so she sits down to meditate. Unfortunately, as she’s sitting she realizes that he kidneys really hurt, but her brain is highly active.
longest acting triptan
highest affinity for 5-HT1B receptors
slower onset
Frovatriptan
frova the triptan, likes the 5HT1B, he was really slow as the people know just the same as you and me
quick dissolving sublingual tablet
faster onset, less nausea than sumatriptan
MAO metabolism
Rizatriptan
rizatriptan rapidly rises to your brain
Triptan side effects:
CNS
peripheral
MSK
HA recurrence, drowsiness
tingling, paresthesias, dizziness
neck stiffness
drug interactions of triptans
SSRIs: causes serotonin syndrome due to inhibition of serotonin reuptake and simultaneous 5HT1B agonism (restlessness, hallucinations, diarrhea)
within 24 hours of ergots
Abortive therapy for cluster HAs
oxygen
triptans
Gold standard Px for cluster HAs
high dose prednisone
verapamil
Acute Tx for tension HAs
nonspecific anti-inflammatory drugs: acetaminophen and NSAIDs
Px for tension HAs
TCAs
Gabapentin
Lifestyle changes for treating IIH
weight loss
removal of drugs like tetracycline, oral contraceptives
reducing vitamin A hypervitaminosis
acute Tx of IIH
what class?
side effects?
CA inhibitors to reduce CSF production
acetazolamide and topiramate
nausea, fatigue, tingling in extremities, weight loss, loss of concentration
What are the three drug classes used in Px of migraines?
Order them from most to least commonly used
- beta blockers
- TCAs
- anticonvulsants
Name the two drug classes used for abortive therapy of migraines.
- ergot alkaloids
- Triptans