Neuro Exam 3 Flashcards
REM sleep
-paradoxical sleep
-brain is electrically + metabolically activated
-muscles are paralyzed
-occurs in bursts w/ 62-173% increase in cerebral blood flow
-controlled by cholinergic cells in the mesencephalic, medullary + pontine gigantocellular areas
-dramatic physiologic change from NREM
NREM sleep
-quiescent sleep
-3 stages
-dreaming is rare
-muscles are not paralyzed
-controlled by the basal forebrain, lower brain stem to the thalamus + hypothalamus
What chemicals control wakefullness?
-NE
-acetylcholine
-histamine
-serotonin
-dopamine
-orexin/hypocretin
What chemicals control sleepiness?
-adenosine
-GABA
-melatonin
What chemicals control NREM?
-GABA
-adenosine
what chemicals control REM?
acetylcholine
what is the BBW for benzos?
-benzos & opioids may result in porfound sedation, respiratory depression, coma + death
- use of benzos exposes users to risk of abuse, misuse + addiction = overdose or death
What is the BBE for z-drugs?
-complex sleep behaviors, including sleep-walking, sleep driving, + engaging in other activities while not funny awake
**d/c immediately if pt. experiences a complex sleep behavior
class side effects of Z-drugs
-use w/ caution in the elderly, drowsiness, dizziness, confusion, risk of falls, avoid use w/ alcohol, withdrawal symptoms upon abrupt d/c (tremor, muscle cramps, seizures)
Estazolam indication
-sleep onset or sleep maintenance insomnia
–> short term management of insomnia characterized by difficulty falling asleep, frequent nocturnal awakenings, and/or early morning awakenings
Estazolam SEs & CIs
SE: hypokinesia
CIs: pregnancy or with itraconazole or ketoconazole
Eeszopiclone (Lunesta) facts
-excellent for sleep maintenance or early morning awakenings –> approved for sleep onset or sleep maintenance insomnia
-can be used long term, up to 6 months
Eszopiclone (Lunesta) SEs
-MAJOR CYP3A4 substrate (monitor when using with ketoconazole, itraconazole)
-SEs: headache, dysgeusia, nervousness/anxiety, xerostomia, infection, stomach upset
Zaloplon (Sonata) facts/uses
-ultra short-acting, rapid onset
-avoid taking after a high-fat meal (delays absorption)
-approved for short-term tx of insomnia (up to 30 days)
**does NOT reduce nighttime awakening
Zaleplon (Sonata) SEs
-excreted in breast milk
-SEs: headache, nausea, abdominal pain
-MAJOR CYP3A4 substrate: interactions with cimetidine, rifampin etc
Zolpidem (Ambien) formulations
-IR tab: sleep onset, off label for sleep maintenance
-ER tab: sleep onset or sleep maintenance
-SL tab: take if more than 4 hours remain before waking and pt has trouble returning to sleep
Zolpidem (ambien) SEs
-rapid onset, short 1/2 life
-avoid use in severe hepatic impairment
SEs: headache, nausea (min tolerance and rebound at rec dosages)
Trazadone facts
-may improve sleep continuity; off-label use
-useful in pts with a hx of substance abuse and/or depression
Trazodone SEs
BBW: suicidal thoughts and behaviors
SEs: carryover sedation and alpha adrenergic blockade
-priapism is a rare side effect
- when d/c, gradually taper the dose over 2-4 weeks
Suvorexant (Belsomra) facts
-turns off wake signaling, assists in getting to sleep and maintaining sleep
-onset of action: <30 mins
Suvorexant (Belsomra) SEs
-interactions with CYP3A4 inhibitors/inducers
-SEs: drowsiness, dizziness, headache, sleep paralysis, abnormal dreams, URTI
**Ci in narcolepsy
Lemborexant (DayVigo) facts
-turns off wake signaling, assists in getting to sleep and maintaining sleep
-doses to 5-10 mg at bedtime with at least 7 hours before planned time of awakening
Lemborexant (DayVigo) side effects
-next-day drowsiness and increased risk of falling –> CNS depression may persist for up to several days after d/c
SEs: drowsiness, dizziness, headache, complex sleep behaviors, abnormal
CI in narcolepsy
Ramelteon (Rozerem) facts
-induces sleepiness, regulates circadian rhythm
-approved for treatment of sleep-onset insomnia and for long-term use
Ramelteon (Rozerem) SEs
-do not use in pts with severe liver disease
-not as effective in pts who have already been treated a BZDRA
-side effects: headache, dizziness, somnolence
**CI with fluvoxamine
**not a controlled substance
Melatonin
-dose of 3 to 5 mg in the evening over 4 weeks (lower doses in elderly pts)
-beneficial effects on sleep-onset latency, shift workers and jet lag
**not recommended for use in pts with Alzheimer’s disease
Doxepin facts
-TCA
-indicated for sleep maintenance insomnia
-inhibits reuptake of serotonin and NE
-BBW: for suicidality
*take with with food –> slower absorption –> next-days somnolence
** do not take within 3 hours of a meal
Insomnia pharmacotherapy for the elderly
-CBT-I
-Ramelteon
-Eszopiclone
-Zolpidem
-low - dose doxepin
Insomnia Pharmacotherapy for the pregnant
-diphenhydramine
-doxylamine
-low -dose doxepin
Types of sleep apnea
-central: impairment of respiratory drive
-obstructive: upper airway collapse and obstruction
-Mixed: both CSA and OSA
Obstructive sleep apnea standard of tx
-nasal positive airway pressure during sleep –> can be administered continuously (CPAP)
-weight management
-avoid all CNS depressants and drug that cause weight gain
Narcolepsy facts
-tetrad: excessive daytime sleepiness, cataplexy, hallucinations, sleep paralysis
-loss of normal function of hypocretin-orexin NT system
Narcolepsy tx
-good sleep hygiene and scheduled daytime naps
-avoidance of drugs that can worsen daytime sleepiness
-focus on tx of excessive daytime sleepiness, cataplexy, and REM sleep abnormalities
*modafinil or armodafinil are standard for EDS
Modafinil (Provigil)
-used for EDS in narcolepsy
-AEs: headache, nausea, anxiety/nervousness, dizziness, dyspepsia, xerostomia, back pain, rhinitis
Armodafinil (Nuvigil)
-AE: headache, insomnia, dizziness, nausea, xerostomia
Both modafinil and armodafinil
-avoid use in pregnancy
-**may decrease effectiveness of contraceptives
-use with cautions in pts with cardiovascular disease, use is not recommended in pt with a hx of left ventricular hypertrophy
Solriamfetal (Sunosi)
-CI with use of MAOi
-AEs: headache, anxiety, insomnia, decreased appetite, nausea
-avoid use in pts with unstable cardio disease, arrhythmias
Pitolisant (Wakix)
-CI in severe hepatic impairment
-may prolong QT (avoid use in pts with known arrhythmias)
-AEs: headache, anxiety, musculoskeletal pain. URI
Sodium oxybate (Xyrem)
BBWs: CNS depression, abuse/misuse, restricted access
**dosed at bedtime after patients is in bed with second dose 2.5 to 4 hours later
AEs: confusion, headache, dizziness, weight loss/decreased appetite, urinary incontinence, drowsiness, depression, somnambulism, anxiety
Medications for Cataplexy in Narcolepsy
-Fluoxetine
-Venlafaxine
-Atomoxetine
-Clomipramine
-Imioramine
-Nortiptyline
-pitolisant
-sodium oxybate
Circadian rhythm disorders
-presents as either insomina or hypersomnia
-commonly manifest as jet lag or shift work disorder
Jet lag
-non- pharm: napping, timed light exposure
-Melatonin, ramelteon, short-acting benzos
-take drug at target destination bedtime to reduce jet lag and shorten sleep latency
Shift Work Disorder
-difficulty with sleep or wakefulness at times that are imposed by shifts running counter to the light-dark cycle
-non pharm: sleep scheduling, sleep hygiene, naps before or during shifts, exposure. to bright light at night and darkness during the day
Pharm options: melatonin, ramelteon, short acting benzos or suvorexant, modafinil and armodafinil to improve wakefulness
Parasomnias
-abnormal behavior or physiological events that occur during sleep
-sleep walking, terrors and talking occur during NREM sleep
-may br due to taking a Z-drug with alcohol or antidepressants
Treatment:
-protect the individual from harm, benzos, SSRIs, or TCA, reduce stress, anxiety, and sleep deprivation to reduce nightmares
Pharmacotherpy for RLS
-intermittent symptoms:
-carbidopa-levodopa
-BZDRA (clonazepam)
-low dose opioid
chronic and persistent symptoms: pregabalin, gabapentin, immediate-release pramipeole, ropinirole, rotigotine
Migraine
-positive visual symptoms
-gradual onset/evolution
-sequential progression
-repetitive attacks of identical
-flurry of attacks midlife
-duration < 60 mins
-headache follows ~50%
TIA
-visual loss
-abrupt
-simultaneous occurence
-duration < 15 mins
-headache uncommon
NSAIDs used for Headache
-Diclofenac potassium oral solution (cambia)
–> indicated for the acute treatment of migraine attacks with or without aura in adults 18+
–> mix single packet contents with 1-2 ounces of water to administration
-Celecoxib oral solutions (Elyxyb)
–> indicated for the acute treatment of migranes with or without aura in adults
Butalbital/APAP/caffeine (Rioricet, Bac, Segic, Zebutal)
*reserve for pts w/o alt treatment options
-BBW for hepatotoxicity (APAP)
-indiated fro tension-type headache, but also used in migraine
AEs: CNS depression, stomach upset
Butalbital/ASA/Caffeine (Fiorinal)
-indicated for tension-type headache, but also used in migraine
-AEs: CND depression, stomach upset
Triptans in use of headache tx
-acute tx of moderate to severe migraines
-administer early in the course of a migraine attack to improve response
AEs: flushing, chest pain, aplpitations, dizziness, fatigue, xerostomia syndrome
**limit use to < 10 days/month
CI: hemiplegic migraine or migraine with brainstem aura, ischemic heart disease, wolff-parkinsin-white syndrome, stroke.TIA, peripheral vascular disease, ischemic bowel disease, uncontrolled HTN, within 24 hrs of an ergotamine or MAOIs (rizatriptan, sumatriptan, zolmitriptan only)
Triptan meds used in moderate to severe migraines
-Almotriptain: better tolerated than suma, penetrates the BBB easier, contains a sulfa group
-Eletriptan: most lipophilic triptan
-Frovatriptan: longest 1/2 life
-Naratriptan: slower onset, fewer headache recurrence than suma
-Rizatriptan: dose reduction with propranolol
-Sumatriptan: PO, intranasal, SQ, lowest oral bio.
-Zolmitriptan: PO, ODT, instranasal
Lasmiditan (Reyvow)
-serotonin 5-HT receptor agonists
-indication: acute tx of migraine w/ or w/o aura
*50-200 mg max 1 dose/day! repeat doses have not demonstrated efficacy
*must wait at least 8 hours before driving
AEs: CNS DEPRESSION, serotonin syndrome, dec HR, inc BP, palpitations, dizziness, N/V
Rimegepant (Nurtec)
-PO ODT
-indications: acute AND prevention tx of migraines
(acute: 75mg/day, prevent: 75 mg EOD)
-onset of action < 2 hours
AEs: abdominal pain, dyspepsie, nausea
Ubrogepant (Ubrelvy)
-ACUTE tx of migraine with or w/o aura
-dose: 50-100mg once can repeat dose after 2 hrs, MDD 200mg
-CI with strong cyp3a4 inhibitors (keto) - admin with high fat meal delays Tmax by 2 hours
-AEs: nausea, drowsiness, xerostomia
Anti-migraine Ergots
-binds with high affinity to certain serotonin, noradrenaline, and dopamine receptors
BBW: CI with potent CYP3A4 inhibitors (protease inhib. macolides, azoles)
**do not use in prego/breastfeeding, within 24 hrs of a triptan, coronary artery disease, uncontrolled HTN
Serious AEs: cardiac valvular fibrosis, ergotism, SS
Ergotamine (Ergomar)
-acute tx of moderate to severe migraine
-not rec in older adults
AEs: N/V, ECG changes, HTN, ischemia, vasospasm, numbness, paresthesia, gangrene
-increaction with grapefruit = inc concentations
-may worsen N/V
-d/c may result in in withdrawal/rebound headache
Dihydroergotamine *DHE: migranal, trudhesa)
-injection: Acute tx of cluster headaches
-injection & nasal spray: acute tx of migraine w or w/o aura
CIs: ischemic heart disease, hx of MI, angina, following vascular surgary
-do not use within 24 hrs of triptans
-admin 1st dose in facility & obtain ECG immediately following 1st dose in pts with CAD risk factors
Severe migraine tx in ED
-IV/IM dexamethasone (reduces early headache occ)
-SQ sumatriptan (quick onset)
-IV prochlorperazine + diphenhydramine
-IV metoclopramide + diphenhydramine
-IV chlorpromazine + diphenhydramine
-IV DHE + antiemetic (metoclopramide)
-IV valproate
-IV/IM ketorolac
-IV magnesium
Migraine preventive tx
-if attacks interfere with ots daily routine
-frequent attackes (6+day/month, 4+ days/month (mod), 3+ days/month (sev))
-CI, failure or overuse of acute tx
-AEs with acute tx
-pt preference
Topiramate
-indicated for prevention of migraine headache in pts > 12 y/o
AEs: cognitive dysfunction, CNS effects, nephrolithiasis, metobolic acidosis, angle-closure glaucoma, hyperthermia, suicidal ideas, weight loss
-counsel on imporance of hydration
-avoid in pregos
Valproic Acid
BBW: hepatotoxicity, pts with mitochondrial disease, fetal risk, pancreatitis
-indicated for headache prevention
-AEs: CNS effects, hematologic effects, hepatotoxicity, encephalopathy, TEN/SJS, DRESS, pancreatitis, suicidal ideation
**dont use for prevention of migraine in pregos or women of CBA not on BC
Beta blockers used in migraine prevention
-propranolol & timolol
TCAS in migraine prevention
-amitriptyline, nortriptyline
-BBW: suicidality
–> lower initial doses for MP than for MMD
-AEs: anticholinergic effects, CNS depression, cardiac conduction abnormalities, hypotension, serotonin syndrome
Atogepant (Qulipta)
-preventive tx for episodic migraines
-dose: 10, 30, or 60 mg ONCE daily
AEs: constipation, nausea, drowsiness, fatigue, weight loss
Eptinezumab (Vyepti)
-CGRP ligand
-IV q 3 months
AEs: infusion reactionnasopharyngitis, nausea
Erenumal (Aimovig)
-CGRP receptor
-SQ monthly
AEs: constipation
Fremanezumab (Ajovy)
-CGRP ligand
-SQ q month or q 3 months
Galcanezumab (Emgality)
-CGRP ligand
1- prevention of cluster headache during cluster episodes in adults
2- prevention of migraine in adults
-SQ q month
Greater occipital nerve block
-lidocaine/bupivacaine/methylprednisolone
**anesthetic nerve blocks are fine in pregos NOT corticosteroids tho
PO Magnesium
*mainly used in women of CBA and in older adults
-migraine prophylaxis, especially in migraine with aura (good for menstrual migraine)
-magnesium oxide 400 mg PO BID
AEs: diarrhea, N/V
Vitamin B2 (Riboflavin)
-give to menstruating women
-migraine prophylaxis