Pharmacology Flashcards

Select and manage pharmacologic therapies, including dosing, side effects, and contraindications. (81 cards)

1
Q

What is pharmacokinetics?

A

Study of how drugs move through the body; includes absorption, distribution, metabolism, and elimination.

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2
Q

What is pharmacodynamics?

A

Study of what a drug does to the body; generally determined by the drug’s affinity and activity at its site of action, often a receptor.

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3
Q

Define:

Bioavailability

A

Ability of a drug to be absorbed and used by the body.

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4
Q

What is the half-life of a drug?

A

The time it takes for the amount of a drug’s active substance in the body to reduce by half.

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5
Q

What is the first pass effect?

A

Pharmacological phenomenon where a drug undergoes metabolism at a specific location in the body, reducing the availability of the drug to travel to distant sites.

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6
Q

What is the cytochrome P450 system?

A

Group of enzymes that metabolizes drugs; largely concentrated in the liver.

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7
Q

List strong inhibitors of the cytochrome P450 system.

A
  • Clarithromycin
  • Darunavir
  • Ketoconazole
  • Lopinavir
  • Nirmatrelvir/ritonavir
  • Saquinavir
  • Voriconazole
  • Grapefruit juice
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8
Q

List moderate inhibitors of the cytochrome P450 system.

A
  • Amiodarone
  • Cimetidine
  • Cyclosporine
  • Diltiazem
  • Erythromycin
  • Fluconazole
  • Letermovir
  • Verapamil
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9
Q

List strong inducers of the cytochrome P450 system.

A
  • Apalutamide
  • Carbamazepine
  • Encorafenib
  • Fosphenytoin
  • Lumacaftor/ivacaftor
  • Mitapivat
  • Mitotane
  • Phenobarbital
  • Rifampin
  • St. John’s Wort
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10
Q

List moderate inducers of the cytochrome P450 system.

A
  • Bexarotene
  • Cenobomate
  • Dexamethasone
  • Eslicarbazepine
  • Modafinil
  • Pexidartinib
  • Primidone
  • Rifabutin
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11
Q

What is the function of glomerular filtration?

A

Filters waste and excess fluid from the blood into the urine.

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12
Q

What does the glomerular barrier restrict?

A

Restricts passage of plasma proteins, such as albumin, red blood cells, and other large blood constituents.

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13
Q

Which drugs bind to albumin?

A
  • Barbiturates
  • Benzodiazepines
  • Penicillin
  • Valproate
  • Phenytoin
  • Warfarin
  • NSAIDs
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14
Q

What happens to glomerular filtration rate with aging?

A

Decreases by approximately 1% per year.

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15
Q

What is the primary effect of NSAIDs?

A

Inhibit cyclooxygenase

(an enzyme that produces prostaglandins)

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16
Q

What are prostaglandins?

A

Hormone-like substances that affect several bodily functions.

e.g., inflammation, pain

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17
Q

What are the two variants of cyclooxygenase?

A
  • COX-1: helps to regulate normal cellular functions (vascular homeostasis, platelet aggregation, kidney function).
  • COX-2: expressed in the brain, kidney, bone, and likely the female reproductive system; expression is increased during states of inflammation and is inhibited by glucocorticoids.
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18
Q

Which medications should be avoided with NSAIDs?

A
  • Phenytoin
  • Warfarin
  • Methotrexate
  • ACE inhibitors
  • Glucocorticoids
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19
Q

Which populations should avoid NSAIDs?

A
  • Peptic ulcer disease
  • Gastrointestinal disease (current or at risk)
  • Cardiovascular disease (current or at risk)
  • Kidney disease (current or at risk)
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20
Q

What does a Gram stain categorize?

A

Categorizes bacteria into either gram-negative or gram-positive bacteria.

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21
Q

What color do gram-positive bacteria appear after Gram staining?

A

Purple

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22
Q

What color do gram-negative bacteria appear after Gram staining?

A

Pink

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23
Q

Which bacteria cannot be visualized with a Gram stain?

A
  • Mycoplasma species
  • Chlamydia
  • Mycobacterium
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24
Q

List examples of gram-positive bacteria.

A
  • Streptococcus
  • Staphylococcus
  • Enterococcus
  • Clostridium difficile
  • Listeriosis
  • Diphtheria
  • Botulism
  • Tetanus
  • Anthrax
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25
List **examples** of **gram-negative** bacteria.
* Neisseria meningitidis or Neisseria gonorrhoeae * Moraxella catarrhalis * Escherichia * Klebsiella * Enterobacter * Pseudomonas * Haemophilus * Acinetobacter * Moraxella * Prevotella * Porphyromonas
26
What are **beta lactam antibiotics**?
Includes penicillins and cephalosporins; both contain a beta lactam ring in their chemical makeup.
27
What **protects** against beta lactamase?
Clavulanic acid
28
What is **Penicillin G** active against?
* Gram positive cocci * Gram positive rods (listeria) * Gram negative cocci (neisseria) * Most anaerobes * Spirochetes
29
What are **anti-staphylococcal penicillins** active against?
* Penicillinase-producing staphylococci * Staphylococcus aureus
30
List **second generation** broad spectrum penicillins.
* Ampicillin * Amoxicillin
31
What is **ampicillin** a preferred treatment for?
Treatment of shigella
32
What are **third and fourth generation** broad spectrum penicillins?
* Third generation: ticarcillin * Fourth generation: piperacillin
33
What is **cephalexin** active against?
* Most gram-positive cocci * Most strains of Escherichia coli * Proteus mirabilis * Klebsiella pneumoniae
34
What are **second generation cephalosporins** active against?
* Haemophilus influenzae * Moraxella catarrhalis
35
What are **third generation cephalosporins** active against?
* Enterobacterales * Neisseria * H. Influenzae
36
What is **cefepime** active against?
* Enterobacterales * Neisseria * H. Influenzae * P. aeruginosa
37
What is **ceftaroline** active against?
* Methicillin-resistant staphylococci * Penicillin-resistant pneumococci * Enteric gram-negative rods
38
What are **tetracyclines** active against?
Many aerobic gram-positive and gram-negative bacteria and atypical pathogens, such as mycoplasma and chlamydia.
39
What is a **side effect** of tetracyclines in children?
Permanent tooth discoloration in children <8 years of age.
40
What are **sulfonamides** active against?
* Variety of aerobic gram-positive bacteria * Variety of aerobic gram-negative bacteria * Methicillin-resistant Staphylococcus aureus
41
What are **fluoroquinolones** active against?
* Aerobic, enteric gram-negative bacilli * Many common respiratory pathogens * Pseudomonas * Selected gram-positive organisms * Anaerobes * Mycobacteria * Tuberculosis anthrax
42
What is **ciprofloxacin** particularly effective against?
* Aerobic, enteric gram-negative bacilli (e.g., Escherichia coli) * Pseudomonas aeruginosa
43
What are **potential adverse effects** of fluoroquinolones?
* Clostridium difficile infection * Tendinopathy * Tendon rupture * Neuropathy * QT interval prolongation * Small alleged risk of aortic dissection and rupture
44
What do **beta blockers** block?
Beta adrenergic receptors
45
Where are **beta-1 receptors** mainly found?
Heart and kidneys
46
Where are **beta-2 receptors** mainly found?
Smooth muscle tissue within the respiratory system, blood vessels, and nervous system
47
Where are **beta-3 receptors** mainly found?
Fat cells and within the bladder
48
List **cardioselective** beta blockers.
* Acebutolol * Atenolol * Betaxolol * Bisoprolol * Esmolol * Metoprolol * Nebivolol
49
List **non-selective** beta blockers.
* Carvedilol * Labetalol * Nadolol * Penbutolol * Propranolol * Sotalol * Timolol
50
What do angiotensin converting enzyme inhibitors **prevent**?
Prevents the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor.
51
What are **ACE inhibitors** first line treatment for?
Hypertension
52
List **examples** of ACE inhibitors.
* Lisinopril * Benazepril * Captopril * Enalapril
53
What are side effects of **decreased angiotensin II** from ACE inhibitors?
* Hypotension * Acute kidney injury * Hyperkalemia * Pregnancy complications
54
What are side effects of **increased kinins** from ACE inhibitors?
* Dry hacking cough * Angioedema (rare, but life threatening)
55
Are ACE inhibitors **contraindicated** in pregnancy?
Yes
56
What are **calcium channel blockers** first line treatment for?
Hypertension
57
What are **non-dihydropyridine calcium channel blockers** used for?
Hypertension (less frequently), chronic stable angina, cardiac arrhythmias
58
List **examples** of non-dihydropyridine calcium channel blockers.
* Verapamil * Diltiazem
59
What are **side effects** of non-dihydropyridine calcium channel blockers?
* Constipation * Bradycardia * Decreased cardiac output * Gingival hyperplasia
60
What are **dihydropyridine calcium channel blockers** used for?
Hypertension, or chronic stable angina
61
List **examples** of dihydropyridine calcium channel blockers.
* Amlodipine * Nifedipine * Nicardipine
62
What are **side effects** of dihydropyridine calcium channel blockers?
* Headache * Lightheadedness * Flushing * Dependent peripheral edema * Gingival hyperplasia
63
What is the first line treatment for **dyslipidemia**?
Statin therapy
64
List **examples** of low intensity statins.
* Lovastatin (20 mg) * Pravastatin (10 to 20 mg) * Simvastatin (10 mg) * Fluvastatin (20 to 40 mg)
65
List **examples** of moderate intensity statins.
* Lovastatin (40 to 80 mg) * Pravastatin (40 to 80 mg) * Simvastatin (20 to 40 mg) * Atorvastatin (10 to 20 mg) * Rosuvastatin (5 to 10 mg)
66
List **examples** of high intensity statins.
* Atorvastatin (40 to 80 mg) * Rosuvastatin (20 to 40 mg)
67
What labs should be **checked** before initiating statins?
Baseline aminotransferase levels and thyroid function (TSH)
68
What is **digoxin** used for?
Heart failure and supraventricular arrhythmias
69
What does digoxin **inhibit**?
Inhibits the sodium potassium pump
70
What are **symptoms** of digoxin toxicity?
* Arrhythmias * Gastrointestinal symptoms * Confusion * Vision changes, such as halos or xanthopsia
71
What is **levothyroxine**?
Synthetic T4
72
What is the first line treatment for **hypothyroidism**?
Levothyroxine
73
What is the **onset of action** for levothyroxine when taken orally?
3 to 5 days
74
What is **metformin** first line treatment for?
Diabetes Type 2
75
What are **benefits** of metformin?
* Decreases A1C by 1% to 2% * Not known to cause hypoglycemia * Decreases food intake and body weight * May help reduce likelihood of cardiac events
76
What is the **most reported side effect** of metformin?
Diarrhea
77
What are **contraindications** for metformin?
* Hypersensitivity to metformin or any component of the formulation * Severe renal dysfunction (eGFR <30 mL/minute) * Acute or chronic metabolic acidosis with or without coma
78
What is the first line treatment for **unipolar depression**?
Selective serotonin reuptake inhibitors (SSRIs)
79
What do **SSRIs** block?
SSRIs block the reabsorption of serotonin, allowing for more serotonin to be available.
80
List **examples** of SSRIs.
* Fluoxetine (Prozac) * Paroxetine (Paxil) * Sertraline (Zoloft) * Citalopram (Celexa) * Escitalopram (Lexapro)
81
What are **side effects** of SSRIs?
* GI discomfort (diarrhea) * Sexual dysfunction * Weight gain