Block 4 Flashcards
Which antidepressants are used in PTSD? Which one is for long-term?
Sertraline + Paroxetine
Sertraline is for long-term use
How do SSRIs affect PTSD symptoms that other rx dont?
“Numb” the symptoms
Remission of PTSD is defined as…
Adequate? Partial?
Remission: >70% reduced symptoms
Adequate: >50
Partial: 25-50%
What are the FDA approved Rx for OCD?
Sertraline, Paroxetine
Clomipramine, fluvoxamine, fluoxetine
Cognitive behavioral therapy is recommended for whom in OCD? Meds?
Everyone
Meds for moderate-severe OCD
Why are SSRIs picked over clomipramine for OCD?
Clomipramine has anticholinergic effects, wt gain, CV issues, and sedation
If SSRI failed for OCD, whats next?
Another SSRI
Treatment resistance in OCD is defined as…
Decrease 25% from baseline YBOCS score
Which Rx should be avoided in special pop for OCD?
Clomipramine
PK of which Rx for OCD is not altered by renal failure pt?
Sertraline
Pregnancy and OCD, whats recommended?
Behavioral therapy first, then fluoxetine
What is a typical regimen for OCD?
SSRI + antipsychotic
Where does clomipramine fall in the regimen for OCD?
Second line treatment
Clomipramine monitoring?
LFTs
BP
If they have fever or sore throat, WBC
Seizures (dose dependent)
What are the major groups found in the sleep cycle? How long is it?
REM + NonREM
70-120 min
DMS-5 of Primary insomnia
Difficulty or maintaining sleep for at least 3 months AND 3 nights/week
Which Rx is FDA approved for insomnia maintenance?
Doxepin
Which antidepressants can be used in insomnia?
Amitriptyline and trazodone
Zolpidem MOA? Zaleplon?
Both binds to BZ-1 receptors, Zaleplon has shorter half life
Zolpidem only; Lower doses in women vs men
What special about Eszopiclone vs zolpidem and zaleplon?
FDA approved for up to 6 months
Special counseling info for ramelteon?
Take within 30 min before you sleep + do NOT take w/ food
Same w/ OX-1 antagonists
What is sleep apnea?
Doesnt breathe for at least 10 sec while sleep
Mild: 5-15/hr
Moderate: 15-30/hr
Severe: >30
Narcolepsy monitoring and genes?
Hypocretin : <110
Chromo 4p13-q21, HLA antigen
Which stimulants are used for cataplectic symptoms of narcolepsy?
None; use TCAs, SSRI, SNRIs, Selegiline
Low to moderate drinkers consume how much alcohol?
<20g/day
Consumption of how much alcohol has a higher risk of CHD?
> 70g/day
Or binge drinking >5 drinks in less than 2hrs
Are toxic alcohols directly toxic?
No, they are inebriating except for isopropanol
Metabolism of Ethylene glycol?
Via alcohol dehydrogenase, forms glycolaldehyde and then to glycolate via aldehyde dehydrogenase then to oxlate via thiamine, magnesium and pyridoxine
Metabolism of methanol?
Via alcohol dehydrogenase forms formaldehyde and then Formate via aldehyde dehydrogenase
Metabolism of isopropanol?
Via alcohol dehydrogenase forms acetone
Osmolarity equation
2Na + (BUN/2.8) + (Glucose/18)
+(EtOH/4.6) if alcohol toxicity
Anion gap equation
Na - Cl - HCO3
Gap present if >12
How to calculate osmol gap?
Measured-Calculated
Normal MEASURED = 285-300
Normal gap = 10-20
How do you interpret which alcohol toxicity is given with anion and osmolar gap?
Anion AND Osmolar gap exist? Any toxicity except isopropyl
Just osmolar gap? Isopropyl toxicity
Ethylene glycol is typically found in what?
Antifreeze, brake fluid
Fluorescein in antifreeze is what is detectable in urine
How much ethylene glycol should someone be sent to a hospital?
10-30ml, but 100ml is considered “toxic”
Ethylene glycol toxicity phases?
I = CNS (30min to 12hrs)
II = Metabolic (12-24hrs)
III = Renal (2-3days)
How do you treat early ethylene toxicity?
Nasogastric aspiration (if less than one hr)
Sodium bicarb if acidosis is life-threatening
How do you manage ethylene glycol toxicity?
Ethanol and fomepizole (adjust fomepizole if HD) to inhibit alcohol dehydrogenase (lvls have to be >20)
Shunting therapy
Hemodialysis
How much methanol is considered toxic?
Found in windshield fluid
15ml (cell death, increases formic acid and blindness)
Methanol level >25
How does formic acid transform to water and carbon dioxide?
Via folate
How does acetone cause acidosis?
It doesnt by its own
It does form ketones and that itself can cause acidosis tho
Antidote + alcohol toxicity, which alcohol doesnt have one?
Isopropanol
How is ethanol metabolised?
Through 3 ways (and is subject to genetic polymorphisms)
Alcohol dehydrogenase
CYP2E1
Peroxidase-catalase system
How do you treat acute intoxication of ethanol?
Nasogastric aspiration, supportive care (D5NS, banana bag)
What is a main concern of acute intoxication of ethanol?
Wernicke’s encephalopathy due to thiamine deficiency
Starvation ketosis
Dehydration
What role does NAD+/NADH play with gluconeogenesis and glycolysis in ethanol metabolism?
Increased NADH/NAD+ ratio (used NAD+, reduced)
Decreased gluconeogenesis and increased glycolysis
Hypoglycemia
What role does NAD+/NADH play with pyruvate in ethanol metabolism?
Increased NADH/NAD+ ratio (used NADH, increased)
Increases pyruvate, which is converted to lactate
Lactic acidosis
What role does NAD+/NADH play with fat breakdown and synthesis in ethanol metabolism?
Increased NADH/NAD+ ratio (used NAD+, reduced)
Less breakdown and increased synthesis
Steatosis of liver
Patho of ethanol homeostasis in:
Non-alcoholics
Intoxication (non regular)
Chronic/regular use
Withdrawal
Non alcoholics; balance of GABA and Glutamate
Non regular drinkers; GABA is upregulated
Chronic/regular drinkers; both are upregulated, but is at “homeostasis”
Withdrawal; Glutamate is upregulated
What Rx can you use for ethanol withdrawal?
BZD; lorazepam, diazepam, chlordiazepoxide
Lorazepam
Diazepam
Chlordiazepoxide
Routes of each?
IV, IM, PO for lorazepam and diazepam
Chlordiazepoxide is PO only
Lorazepam
Diazepam
Chlordiazepoxide
Active metabolites?
Lorazepam is the only one that doesnt have one
Lorazepam
Diazepam
Chlordiazepoxide
Onset and half life?
Diazepam has shortest onset and longest half life
Lorazepam has 10-20 min onset with 12 hr half life
Chlordiazepoxide has longest onset with 12-24hr half life
Isopropyl
Methanol
Ethylene glycol
Ethanol
Oxalic acid metabolite
Ethylene glycol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Formic acid metabolite
Methanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Doesnt have a metabolite
Ethanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Acetone metabolite
Isopropyl
Isopropyl
Methanol
Ethylene glycol
Ethanol
Found in liquor
Ethanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Windshield fluid
Methanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Rubbing alcohol
Isopropyl
Isopropyl
Methanol
Ethylene glycol
Ethanol
Antifreeze
Ethylene glycol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Has no anion gap
Isopropyl
Isopropyl
Methanol
Ethylene glycol
Ethanol
Ketosis exist
Only is isopropyl and ethanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Hypoglycemia occurs
Ethanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Blindness
Methanol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Gastritis
Isopropyl
Isopropyl
Methanol
Ethylene glycol
Ethanol
Renal failure
Ethylene glycol
Isopropyl
Methanol
Ethylene glycol
Ethanol
Is osmotically active
All of them
What is the most common assay method for drug test?
EI
What are the federal (DHHS) guidelines that workplace must test for?
Marijuana
Cocaine
Opiates
PCP
Amphetamines
Methamphetamines
What medications would cause a false positive value of amphetamines on the EI?
Selegine, bupropion, pseudoephedrine, metformin
What medications would cause a false positive value of BZDs on the EI?
Sertraline, efavirenz
Only measures nordiazepam and oxazepam
What medications would cause a false positive value of opiates on the EI?
FQs, naltrexone, poppy seeds
Only detects morphine and codeine
Does passive smoke or ingestion of hemp food cause a positive test on EI?
No
Estimated detection time in urine of amphetamine? Pseudoephedrine? Methylphendiate?
Amphetamine - 3 days
Pseudoephedrine - 5 days
Methylphenidate - 1 to 2 days
Estimated detection time in urine of BZD?
Diazepam - 10 days
Others = 5 days
Estimated detection time in urine of opiates?
Morphine and codeine - 3 days
Estimated detection time in urine of buprenorphine?
7 days
Estimated detection time in urine of LSD?
<1 days
Metabolite = 5 days
Estimated detection time in urine of marijuana?
Single use - 3 days
4-6x/week = 5 days
Daily = 10 days
Heavy use = 30 days
Estimated detection time in urine of PCP?
8 days
How are hair samples stored?
Dark room temp w/ gentle air to be dried if needed (not blow dry)
What makes a good test in regards to sensitivity and specificity?
Both >95%
How long does it take for the breath test?
2 minutes
Does physical dependence constitute addiction?
No, but often accompanies it
What is the only actual evidence of physical dependence?
Withdrawal syndrome
In addiction, what pathway is mostly affected?
Mesolimbic / Nucleus Accumbens
Dopamine and glutamate
Opioid withdrawal sx?
Not life-threatending
Pupil dilation Sweat Tachycardia V/D Yawn Increase BP
BZD withdrawal sx?
High doses - seizures and delirium
Moderate doses - anxiety, light sensitivity, cramps, sleep issues
Barbiturate withdrawal sx?
Tremors, hallucinations, hyperthermia, seizures, respiratory depression and arrest, coma, death
Order of potency
Carfentanil, Fentanyl, Heroin, Morphine, Sufentanil
Morphine (1)
Heroin (2)
Fentanyl (100)
Sufentanil (500)
Carfentanil (10,000)
Which body systems are affected by amphetamine toxicity?
CV + CNS
Same as cocaine
How is heroin metabolized? Codeine?
Converts to diacetylmorphine then hydrolyzed to morphine
Codeine (an inactive prodrug) also is converted to morphine via 2D6
Opioid dependent vs opioid naive pt on heroin and PK
Naive = less concentration
Dependent = heroin concentration is much higher
Non Pharm AUD - Mild Tx
AA
Set goals
Drink less, alternate alcoholic with non alcoholic
Basic stuff
Non Pharm AUD - Moderate/severe Tx
Make recovery your priority in first few months
Avoid triggers (pubs, friends)
Sleep regular schedule
Contingency plan for relapse, contact someone if this occurs
What is the delay, distract, and urge surfing technique?
Delay: wait x min to act on craving
Distract: prepare list of distraction ahead of time
Urge surfing: Picture urge as something else and imagine doing that instead
What are the 3 FDA Rx for alcohol cessation?
Disulfiram, Acamprosate, Naltrexone
Disulfiram MOA?
Metabolites of DSF inhibit aldehyde dehydrogenase
Leads to facial flushing, N/V, tachycardia
Enzyme inhibition is IRREVERSIBLE
Used cautiously in mild/moderate
Avoid in SEVERE cases
Acamprosate MOA?
Used after detoxification to decreases craving
Naltrexone MOA?
Similar to Acamprosate in that it reduces craving
Buprenorphine MOA?
Partial mu agonist and kappa antagonist