Sleep Flashcards
How do sedatives work? (four items)
Calms anxiety, decreases excitement and activity, does not produce drowsiness, and does not impair performance
Do anxiolytics cause sleepiness or sedation
NO, anxiolytics are antianxiety medications that do not produce sleep or sedation. Not all anxiolytics are sedatives
What do hypnotics do? (three things)
sleep-inducing, implies restful and refreshing sleep, NOT HYPNOTIZED
What are narcotics? (two points)
Sleep producing, opioids or illegal drugs
What structures does the reticular formation extend through? (3)
through the central core of the medulla oblongata, pons and midbrain
What is the reticular formation composed of (2)
white matter and loosely clustered neurons
What does the reticular formation do?
contains dopamine, adrenergic, serotonergic, and cholinergic neurons and regulates sleep-wake transitions and synchronization of EEG
What are the 3 stages of sleep?
Wakefulness, NREM, REM
How many stages are there in NREM and what are they?
4 stages
Stage 1= dozing
Stage 2= unequivocal sleep
Stage 3= voltage increase, frequency decrease
stage 4= delta waves
What stage does REM look similar to on an EE? (1, 2, 3, 4, or awake)?
similar to awake on the EEG
What are four factors that regulate sleep?
age, sleep history, drug ingestion, and circadian rhythms
What is chronopharmacology?
the circadian clock picture essentially
Which neurotransmitters regulate sleep? (8)
epinephrine, norepinephrine, dopamine, serotonin, histamine, acetylcholine, adenosine, GABA
What neurotransmitter is the main target for sleep medications?
GABA
Neuromodulators of sleep (5)
Growth Hormone, prolactin, cortisol, melatonin, endogenous peptides
four components of GABA neurotransmission
GABAa receptors, GABAb receptors, GABA transporters (GAT-1), GABA transaminase (GABA-T)
How many subunits are there on GABAa receptor
5 subunits
What kind of ion channel is GABAa receptor
Chloride ion channel
What are the orthosteric sites on GABAa receptor (2)
a1 and B2
What are the allosteric sites on GABAa receptor (2) and what three things target them?
benzodiazepines, ethanol, glucocorticoid target a1 and gamma2
What drug targets the channel pore of GABAa receptor
picrotoxin
Mechanism of action Benzodiazepines
facilitate the action of GABA by increasing the frequency of the channel opening. a1-5
what is the name of the drug class that are non-benzodiazepines that act at the BZD receptor
z-hypnotics
what 3 drugs are part of z-hypnotics
zolpidem, zaleplon, eszopiclone
What specific receptors do non benzodiazepines work on?
BZ1 receptors of a1 on GABAa receptors
What drug is a BZD antagonist used for overdose treatment
flumazenil
what is an inverse BZD agonist
B carbolines
How do barbiturates work
increase the duration of GABAa receptor channel opening and have direct effects on GABAa AT HIGH DOSES
1 position alkylation of BZDS produces
active metabolites like oxazepam
annealing the 1-2 bond of BZDs with triazole or imidazole ring yields ____ affinity and ____ half-life
high, decreased
the half life of diazepam is ___ (long or short)
long
What gets removed from diazepam and at what position to make oxazepam, and active metabolite?
dealkylated at 1 position
What is desmethyldiazepam
the intermediate between diazepam and oxazepam
Which BZDS have slow elimination and active metabolites? (6)
Chlordiazepoxide, Diazepam, Flurazepam, Clorazepate, Quazepam, Prazepam
Which two drugs are anticonvulsants and sedatives?
Diazepam and Clonazepam
True or False: Prazepam is commonly used in the US
FALSE, currently unavailable in US
Which was the first BZD?
Chlordiazepoxide, Diazepam, Flurazepam, Clorazepate, Quazepam, Prazepam
Which BZDS have intermediate elimination rates? (5)
Alprazolam, Lorazepam, Clonazepam, Oxazepam, and Temazepam
Which two BZDs are rapidly eliminated
Midazolam (VERSED) and Triazolam
What kind of sleeplessness is best for BZDs that have slow elimination and formation of active metabolites?
patients who wake up in the middle of the night
BZDs that are rapidly eliminated cause rapid tolerance (T/F)
True
Intermediate to rapidly eliminated BZDs should be used in 2 populations
elderly, patients with hepatic problems
What does taking BZDs with food do
delays absorption
Increase lipid solubility will increase speed of delivery to _____
the brain
True/False: BZDs are not a concern during pregnancy and breastfeeding
false, cross placental barrier and are detected in breast milk
Which are more dangerous at high doses, barbiturates or BZDs?
Barbiturates, may cause coma at doses that are too high whereas BZDs hit a plateau
Respiratory depression is a major concern for what drug class when combined with other agents?
BZDs
What is the result of BZDs on REM sleep? Which stages of sleep does it effect?
decreases REM sleep, decreases stages 3 and 4
Side effects of BZDs are ____ dependent
dose
What is Flumazenil used for
BZD antagonist for overdose
what is the max cumulative dose of Flumazenil for overdose?
3mg
What is the initial dose of Flumazenil for overdose
0.2mg IV over 30 seconds
What are some side effects of Flumazenil
induce convulsions, panic attacks, agitation, confusion, n/v, headache
is zolpidem short term or long term
short term
is zaleplon short term or long term
short term
is eszopiclone short term or long term
long term
how are z-hypnotics metabolized
cyp3a4
do z-hypnotics have less or more negative side effects on sleep patterns than BZDs
less!
FDA mandates that we must warn patients of what for z-hypnotics
weird behaviors during sleep, sleep cooking, sleep sex, sleep driving, sleep eating
Flunitrazepam is also called
roofies
Zolpidem can be used illicitly and is called
zombie pills or A-minus
is phenobarbital long acting or short acting
long acting
is pentobarbital long acting or short acting
short acting
What do Barbiturates do to REM sleep
decrease REM
Barbiturates may cause ____ and ____ depression
cardiovascular and respiratory
What part of the brain is GABAb receptor located in?
limbic system
what is the presynaptic ion for GABAb receptor? (increase or decrease)
Ca2+ decrease
What is the postsynaptic ion for GABAb receptor? (increase or decrease)
K+ increase
What are two drug agonists of GABAb receptors?
baclofen and GHB
Three antagonist drugs of GABAb receptor
phaclofen, saclofen, and 2-hydroxysaclofen
What are the two other names for GHB?
Xyrem and sodium oxybate
What should be given with GHB if it is chosen by a provider?
Give with concomitant stimulant use during the day to decrease excessive daytime sleepiness and decrease cataplexy (sudden loss of muscle tone during the day)
What is the target of GHB?
GABAa GABAb and GHB receptors
Liquid ecstasy, liquid x, juice, scoops are all street names for what drug
GHB, Sodium oxybate, Xyrem
Acute effects of GHB include 6 things
loss of reflexes/consciousness
amnesia
N/V
headache
seizures
death
How can you treat someone who has been spiked with GHB
THERE IS NO ANTAGONIST, supportive treatment only
Explain the levels of melatonin over the course of a day
melatonin begins being produced in the evening, peaks at night, and declines to low daytime amounts in the morning
what gland produces melatonin
pineal gland
What are the two melatonin agonists
Ramelteon and Tasimelteon
Ramelteon is metabolized by what cyp
CYP1A2
What kind of sleeplessness are melatonin agonists used for
insomnia characterized by difficulty with sleep onset
What is the benefit of melatonin agonists for patients?
No abuse, no withdrawal, no dependency, non-controlled substance
Receptor target of Ramelteon and Tasimelteon
high affinity for MT1 and MT2 melatonin receptors in the suprachiasmatic nucleus
which drug is an orphan product
tasimelteon
which drug can be used to treat non-24 hour sleep wake disorders in blind individuals?
tasimelteon
where are oxerin receptors in the brain
hypothalamus
what does oxerin do?
regulate wakefulness, arousal, and thermoregulation
what is the target of suvorexant
orexin receptor antagonist, OX1 and OX2 in hypothalamus
What are the indications of trazodone
antidepressant and hypnotic under investigation
What OTC drugs can be used as a hypnotic (3)
Antihistamines (diphenhydramine, doxylamine, pyrilamine)
What are the signs of sedative-hypnotic overdose?
depressed respiration, low blood pressure, no reflexes, hypothermia
Disease states, medications, substances associated with insomnia (12)
anxiety, caffeine, modafinil, amphetamines, beta-agonists, beta-blockers, nicotine, thyroid meds, mood disorders, bupropion, decongestants, methylphenidate
The DSM-5 renamed sleep disorder chapter to what
sleep/wake disorders to recognize its more than just not being able to sleep
two sleep related movement disorders
restless leg syndrome and periodic leg movements in sleep (PLMS)
two breathing related sleep disorders
obstructive sleep apnea and central sleep apnea
two types of circadian rhythm sleep-wake disorders
non-24-hr sleep-wake (blind) and shift work type
what is insomnia
difficulties with sleep initiation, sleep maintenance, and/or early morning waking
how often must insomnia take place and how long must it be present
3 times per week for at least 3 months
what kind of sleep disorder can be classified as transient (jet lag), short term (up to 4 weeks), and long term (more than 4 weeks)
insomnia
what five medications are used to help sleep onset only
zolpidem, eszopiclone, zaleplon, triazolam, ramelteon
what four medications are used for sleep maintance only
suvorexant, doxepin, eszopiclone, zolpidem
what three medications can be used for both sleep onset and sleep maintenance
zolpidem, eszopiclone, and temazepam
What is the first line therapy for sleep disorders
non-pharmacological and sleep hygiene
What class of medications (bonus if you can name them) are used most commonly for sleep disorders
z-hypnotics (zolpidem, eszopiclone, zaleplon)
what is intermezzo and what is it approved for
sublingual dosage form of zolpidem that is used if a patient wakes up in the middle of the night with at least 4 hours of sleep left
What is the initial dose of zolpidem in women and the elderly
5 mg, lower to reduce fall risk
what do some patients complain of when taking lunesta (eszopiclone)
metallic taste
z-hypnotics are metabolized by what enzyme
cyp3a4
four side effects of z hypnotics
somnolence, dizziness, ataxia, headaches
what are parasomnias and what drug class causes them
z hypnotics, unusual actions while a person is sleeping
T/F, Z-hypnotics are not controlled substances
false, high potential for misuse
what causes more daytime hangover, z-hypnotics or BZDs
Z-hypnotics
Which is the preferred BZD for sleep
temazepam
side effects of BZDs for insomnia
drowsiness, dizziness, cognitive impairment, increased fall risk
what are warning associated with doxepin for sleep
suicidality and sleep behaviors
all sleep medications have what warning
odd sleep behaviors (sleep sex)
Melatonin agonist have a greater affinity for melatonin receptors than melatonin, true or false
TRUE
Two contraindications of ramelteon
with fluvoxamine or angioedema with past used
how fast is sleep onset after taking ramelteon
30 minutes, see results after 3 weeks
side effects of ramelteon
GI upset, next day somnolence, hyperprolactinemia, prolactinoma
what is the dose of ramelteon
8mg 30 minutes before bedtime
what is the unique indications of tasimelteon
non-24 sleep wake disorder in adults (BLIND)
Addition side effects of tasimelteon
increased ALT, nightmares, unusual dreams
dose of tasimelteon
20mg before bedtime on empty stomach at the same time every night
melatonin agonists are substrates of which enzyme
1a2
suvorexant dose
10mg 30 minutes before bed, must have at least 7 hours to sleep
what is the warning associate with taking 20mg of suvorexant
warning against daytime driving
Contraindication of suvorexant, lemborexant, and daridorexant
CI in narcolepsy due do cause narcolepsy-like side effects
what enzyme metabolizes suvorexant, lemborexant, and daridorexant
3a4
dose of lemborexant
5mg at bedtime with at least 7 hours of sleep
dose of daridorexant
25mg at bedtime with at least 7 hours of sleep
At what doses of suvorexant, lemborexant, daridorexant respectively should the patient be advised to avoid daytime driving
20mg, 10mg, and 40mg
what happens to onset of effects of orexin receptor antagonists if the medication is taken with high-fat, high calorie meals, or food in general
the absorption is delayed and the effects are delayed
orexin receptor antagonists can worsen what
depression and suicidal ideation
doxepin receptor target
H1 receptor antagonism at low doses
what kind of side effects are common on doxepin
anticholinergic side effects (4 Can’ts. CAN’T-See – blurred vision; CAN’T-Pee – urinary retention; CAN’T-Spit – dry mouth; CAN’T-Shit – constipation)
True or false, trazodone is approved for insomnia
False
What property of trazodone causes daytime hangover
long-half life
how does the AASM feel about using trazodone for sleep
recommends against, though is clinically effective
Mirtazapine is best used for sleep if patients have what other condition
clinically effective if patient has depression and difficulty sleeping
what dose of mirtazapine is more effective (high or low)
low, 7mg is more sedating than 30mg
Quetiapine recommendation for insomnia
not recommended for insomnia unless patient has a comorbid psychiatric disorder
what kind of antipsychotic is quetiapine
atypical
what is the recommendation for diphenhydramine for insomnia by AASM
not recommended
side effects of diphenhydramine
anticholinergic and paradoxical hyperactivity, especially in children
What co-morbid conditions should diphenhydramine be avoided in (3)
narrow angle glaucoma, acute asthma, and BPH due to anticholinergic effects
what is melatonin metabolized by
1a2
what kind of sleep issue should melatonin be used for
jet lag
What should we warn patients about with german chamomile for sleep
allergic reactions in patients with daisy or ragweed allergies
what is a CI of Kava
hepatotoxicity
what is the FDA approved duration for sleep medication
short term use of 10 days…
Patient must have evidence of at least _ obstructive apneas per hour of sleep confirmed by polysomnography
5
what are the two obstructive apnea signs
daytime sleepiness, nocturnal breathing disturbances
What are the symptoms of obstructive sleep apnea
daytime sleepiness, snoring, pauses in breathing, headache, irritability, sore throat, erectile dysfunction, impaired memory, GERD, mood disturbances
How do you treat insomnia and sleep apnea
treat sleep apnea first. Many patients have both that will need to be treated.
When should a patient get polysomnography (6)
significant cardiorespiratory disease, potential muscle weakness due to neuro-muscular condition, sleep-related hypoventilation, chronic opioid medication use, hx of stroke, severe insomnia
non-pharm treatments of obstructive sleep apnea (4)
weight loss, smoking cessation, avoid alcohol and other CNS depressants, sleep on side instead of back
What is a cpap and what should it be used for
continuous positive airway pressure for sleep apnea
what two drugs can be used for excessive daytime sleepiness
modafinil and armodafinil
what should be reviewed first before initiating modafinil and armodafinil for daytime sleepiness
CPAP adherence and possibility of RLS or PLMS
What is narcolepsy
recurring episodes of irresistible need to sleep, fall asleep, or nap at least 3 times per week over the last 3 months
What is common for narcoleptics
sleep paralysis
What is the narcolepsy tetrad
EDS, cataplexy, hallucination, and sleep paralysis
three drugs used for cataplexy
sodium oxybate (xyrem/GHB)
Xywav
lumryz
what electrolyte is GHB high in
sodium (also called sodium oxybate)
what age is Xywav approved for
adults and children 7 or older
How is the sodium content of Xywav compared to GHB?
Xywav has lower sodium content
Lumryz is IR and can be used for children
False, Lumryz is ER and is for adults only
when should lumryz be taken
once at night
sodium content of lumryz
high
what is a black box warning for lumryz
respiratory depression and misuse
what is a life threatening risk of taking modenafil and armodafinil for EDS
life-threatening rash
in addition to cataplexy, GHB can be used for what tetrad of narcolepsy
EDS (excessive daytime sleepiness)
what two drugs were recently approved for EDS
pitolisant and solriamfetol
What is the receptor target of pitolisant
H3 receptor antagonist/inverse agonist
Pitolisant is contraindicated in patients who have ____
severe hepatic impairment and moderate/severe renal impairment
what enzyme does pitolisant induce or inhibit
3a4 inducer
what medication should we be worried about having reduced efficacy when taken with pitolisant
oral contraceptive due to inducing cyp3a4 metabolism
What OTC should pitolisant be avoided being used with
h1 receptor antagonists like OTC antihistamines
what is a side effect of pitolisant
QTc prolongation
What two neurotransmitters does solriamfetol prevent being uptaken
dopamine and norepinephrine
is solriamfetol an agonist or inhibitor
inhibitor, prevents uptake of neurotransmitters
what is the indication of solriamfetol
improve wakefulness in adults with EDS due to narcolepsy and OSA
What is the starting and max dose of solriamfetol for patients with moderate renal impairment
37.5mg starting, max 75mg after at least 7 days
what is the starting and max dose of solriamfetol for patients with severe renal impairment
37.5 is starting and max dose
What patients should not get solriamfetol
patients with unstable CVD and arrhythmias, caution in patients with history of psychosis or Bipolar disorder
what are the two drugs of choice for shift work sleep disorder
modafinil and armodafinil, taken 1 hour before the work period starts
what is restless leg syndrome
the urge to move the legs in response to an uncomfortable or unpleasant sensation that begins or worsens during periods of rest, is partially relieved by movement, or is worse in the evening or night
gabapentin enacarbil is a potential first line agent approved for what type of sleep/wake disorder
restless leg syndrome
what two dopamine agonists may be used for RLS
pramipexole or ropinirole
what supplement is recommended for restless leg syndrome
iron supplementation