Basic Pharmacology and Public Health Flashcards
Low Volume of distribution
COMPARTMENT & DRUG TYPES
Intravascular
Large/charged molecules; plasma protein-bound
Medium Volume of distribution
COMPARTMENT & DRUG TYPES
ECF
Small hydrophilic molecules
High Volume of distribution
COMPARTMENT & DRUG TYPES
All tissues including fat
Small lipophilic molecules, especially if bound to tissue protein
Types of drug interactions
Additive - EXAMPLE
Aspirin and acetaminophen
Types of drug interactions
Permissive - EXAMPLE
Cortisol on catecholamine responsiveness
Types of drug interactions
Synergistic - EXAMPLE
Clopidogrel with aspirin
Types of drug interactions
Tachyphylactic - EXAMPLE
An acute decrease in response to a drug after initial/repeated administration
P - phenylephrine L - LSD a N - Nitrates N - niacin e M' - MDMA
Drug metabolism - Phase I
Reduction, Oxidation, Hydrolysis with
cytochrome P-450
Geriatric patients lose phase I first.
R-OH
Drug metabolism - Phase II
Conjugation (Methylation, Glucuronidation, Acetylation, Sulfation) usually yields very polar, inactive metabolites (renally excreted).
conjugating MAGS
Therapeutic index
TITE: Therapeutic Index = TD50/ED50·
Drugs with lower TI values frequently require monitoring, for example…
Warfarin, Theophylline, Digoxin, Antiepileptic drugs, Lithium;
Warning! These Drugs Are Lethal!
Anticholinesterase poisoning - Muscarinic effects:
Diarrhea, Urination, Miosis, Bronchospasm, Bradycardia, Emesis, Lacrimation, Sweating, Salivation.
DUMBBELSS.
Reversed by atropine, a competitive inhibitor. Atropine can cross BBB to relieve CNS symptoms.
Anticholinesterase poisoning - Nicotinic effects
Neuromuscular blockade (a mechanism similar to succinylcholine). Reversed by pralidoxime, regenerates AChE if given early.
Pralidoxime (quaternary amine) does not readily cross BBB.
Anticholinesterase poisoning - CNS effects
Respiratory depression, lethargy, seizures, coma.
Atropine - ADVERSE EFFECTS
Side effects: Hot as a hare Dry as a bone Red as a beet Blind as a bat Mad as a hatter Full as a flask
Albuterol, salmeterol,terbutaline - ACTION
beta2 >beta1
Dobutamine- ACTION
beta1 > beta2, alfa
Dopamine- ACTION
D1 = D2 >beta > alfa
Epinephrine- ACTION
beta > a
Fenoldopam- ACTION
D1
lsoproterenol- ACTION
betaI = beta2
Midodrine- ACTION
a1
Mirabegron- ACTION
beta 3
Norepinephrine- ACTION
alfa1 > alfa2 >beta1
Phenylephrine- ACTION
a1 > a2
Nebivolol ACTIONS
combines cardiac-selective beta 1-adrenergic blockade with stimulation of
beta 3 receptors (activate nitric oxide synthase in the vasculature and dec. SVR)
NebivOlol increases NO
Beers criteria Examples include:
- a -blockers (risk of hypotension)
- Anticholinergics, antidepressants, antihistamines, opioids (risk of delirium, sedation, falls, constipation, urinary retention)
- Benzodiazepines (risk of delirium, sedation, falls)
- NSAIDs (risk of GI bleeding, especially with concomitant anticoagulation)
- PPIs (risk of C difficile infection)
A-alfa blockers
B - BNZ
C - antiCholinergics
D - antiDepressants.
P - PPI H - antiHistamins O - Opioids N - NSAIDs e
Specific toxicity treatments - Acetaminophen
N-acetylcysteine (replenishes glutathione)
Specific toxicity treatments - AChE inhibitors, organophosphates
Atropine> pralidoxime
Specific toxicity treatments - Antimuscarinic, anticholinergic agents
Physostigmine, control hyperthermia
Specific toxicity treatments - Benzodiazepines
Flumazenil
Specific toxicity treatments - beta-blockers
Atropine, glucagon, saline
GAS
Specific toxicity treatments - Carbon monoxide
100% O2, hyperbaric O2
Specific toxicity treatments - Copper
penicillamine, trientine
Specific toxicity treatments - Cyanide
Nitrite + thiosulfate, hydroxocobalamin
THiN
Specific toxicity treatments - Digitalis (digoxin)
Digoxin-specific antibody fragments
Specific toxicity treatments - Heparin
Protamine sulfate
Specific toxicity treatments - Iron
Deferoxamine, deferasirox, deferiprone
Specific toxicity treatments - Methanol, ethylene glycol (antifreeze)
Fomepizole > ethanol, dialysis
Specific toxicity treatments - Methemoglobin
Methylene blue, vitamin C (reducing agent)
Specific toxicity treatments - OpiOids
NalOxOne
Specific toxicity treatments - Salicylates
NaHCO3 (alkalinize urine), dialysis
Specific toxicity treatments - TCAs
NaHCO3 (stabilizes cardiac cell membrane)
Specific toxicity treatments - Warfarin
Vitamin K (delayed effect), PCC/FFP (immediate effect)
Specific toxicity treatments - Dimercaprol, succimer TREAT
Lead
Arsenic
Mercury
LAMe
Specific toxicity treatments - Lead
Calcium disodium EDTA, Dimercaprol, succimer, penicillamine
Cytochrome P-450 interactions - Substrates
Warfarin
Anti-epileptics
Theophylline
OCPs
War Against The OCPs
Cytochrome P-450 interactions - Inducers
Modafinil Chronic alcohol use St. John's wort Phenytoin Phenobarbital Nevi rapine Rifampin Griseofulvin Carbamazepine
Most chronic alcoholics Steal Phen-Phen and Never Refuse Creasy Carbs
Cytochrome P-450 interactions - Inhibitors
Sodium valproate lsoniazid Cimetidine Ketoconazole Fluconazole Acute alcohol abuse Chloramphenicol Erythromycin/clarithromycin Sulfonamides Ciprofloxacin Omeprazole Metronidazole Amiodarone Grapefruit juice
SICKFACES.COM (when I Am drinking Grapefruit juice)
-umab ending means
hUman monoclonal Ab
-zumab ending means
hUmaniZed mouse monoclonal Ab
-ximab ending means
CHImeric human-mouse monoclonal Ab
Informed consent
A process (not just a document/signature) that requires: • Disclosure • Understanding • Capacity • Voluntariness
DUC-V
Exceptions to informed consent
- Waiver
- Incompetent (Legally)
- Privilege (Therapeutic)
- Emergency situation
WIPE
Decision-making capacity Components:
- Goals - Decision is consistent with the patient’s Values and Goals
- Informed - Patient is Informed (knows and understands)
- Expression - Patient Expresses a choice
- Mental status/Mood - The decision is not a result of altered Mental status (eg, delirium, psychosis, intoxication), Mood disorder
- Stable- Decision remains Stable over time
- Age - Patient is 18 years of age (or older) or otherwise legally emancipated
GIEMSA
Advance directives
Written advance directive
Oral advance directive
Do not resuscitate order
Medical power of attorney
WOD-power
Changes in the elderly
R- recomposition (inc. fat, dec. muscle)
E - ejaculation/erection (slower, longer RP)
V - vaginal shortening, thinning, drying.
I - immune response dec.
S - suicide rate inc.
I - intelligence does not change.
O - organ function dec. (GI, renal, pulmonary)
n -nothing
S - Sleep patterns: dec. REM and slow-wave sleep; inc. sleep onset latency; inc. early awakenings.
S - sensory (vision and hearing dec.)
Confidentiality - General principles for exceptions to confidentiality:
- Potential physical harm to others is serious and imminent
- Alternative means to warn or protect those at risk is not possible
- Self-harm is likely
- Steps can be taken to prevent harm
Confidentiality - Examples of exceptions
- Suicidal/homicidal patients
- Abuse (children, elderly, and/or prisoners)
- Victim - Duty to protect: State-specific laws that sometimes allow the physician to inform or somehow protect potential Victim from harm.
- Epileptic patients and other impaired automobile drivers.
- Diseases (Reportable)
The physician’s good judgment SAVED the day