Medications Flashcards

1
Q

Pharmacology

A

how drugs work in the body

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2
Q

what is an indication

A

the indication of a drug is what the drug is licensed to treat

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3
Q

what is the indication of ampicillin

A

bacterial infections

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4
Q

indication of metformin?

A

type 2 diabetes

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5
Q

indication of Viagra (sildenafil)?

A

erectile dysfunction

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6
Q

can meds have more than one indication?

A

yes

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7
Q

what is a mechanism of action of a drug?

A

how a drug works to achieve its therapeutic effect

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8
Q

what is the mechanism of action also called?

A

mode of action

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9
Q

what are the indication of statins?

A

high blood pressure

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10
Q

what is the medical term for high blood pressure?

A

hypercholesterolemia

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11
Q

how do statins work?

A

by inhibiting the enzyme HMG-CoA reductase –an essential enzyme in the production of cholesterol in the body

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12
Q

side effect

A

expected reactions that occur while taking the drug

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13
Q

some side effects of metformin

A

taste disturbance
diarrhea
weight loss
lactic acidosis
vitamin B12 deficiency

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14
Q

adverse effects

A

unintended, potentially life threatening effects

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15
Q

side effects can be positive or negative (true or false)

A

true

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16
Q

adverse effects are only negative (true or false)

A

true

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17
Q

pharmacokinetics

A

discipline of pharmacology that studies how an organism affects a drug

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18
Q

what is the acronym for pharmacokinetics?

A

ADME
absorption, distribution, metabolism, excretion

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19
Q

what are the two ways to metabolize drugs

A

via the liver and via gastrointestinal tract

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20
Q

pharmacodynamics (PD)

A

talks about what the drug does to the body – the biochemical and physiological effects of drug on the body

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21
Q

what helps learn the optimum dose

A

pharmacodynamics

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22
Q

optimum dose-response relationship

A

limits side effects whilst maximizing the clinical effects of the drug

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23
Q

what are receptors?

A

proteins-chemical structures in the body

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24
Q

what happens when a receptor is activated?

A

a physiological response takes place

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25
what binds to receptors?
neurotransmitters
26
what are the 4 main neurotransmitters?
histamine, serotonin, dopamine, and epinephrine
27
what is agonism?
the receptor has been activated
28
what is antagonism?
when you have deactivated the receptor -- when you block the reaction
29
where are beta 1 receptors?
heart
30
where are beta 2 receptors?
lungs
31
what is a common receptor?
histamine (most important are H1 and H2)
32
antihistamines work by blocking the _____ ?
H1 receptor
33
H1 receptor antagonists include:
loratadine levocetirizine fexofenadine azelastine chlorpheniramine
34
where is the H2 receptor located
in the stomach
35
what happens when neurotransmitter binds to the H2 receptor?
acid production occurs
36
H2 antagonists prevent histamine from binding to the H2 receptor in the stomach and prevent what?
gastric acid production
37
what do H2 antagonists treat?
indigestion, dyspepsia, gastro-esophageal reflux disease
38
example of H2 antagonists?
ranitidine
39
what are agonists?
drugs that bind to receptors and promote its natural physiological outcome
40
what are antagonists?
drugs that block receptors
41
what does albuterol target?
beta-2 receptors
42
CYP 450 enzyme system
a superfamily of enzymes elaborate bodily system involved in metabolizing drugs
43
where are CYP enzymes located
in the liver
44
what is known as the great factory of drug metabolism
liver
45
where can CYP enzymes also be found in
the intestine
46
what enzyme is known as metabolizing over half of all the prescribed drugs?
CYP 3A4
47
what are CYP inducers?
drugs that enhance the effects of CYP 3A4
48
an example of CYP inducer?
carbamazepine
49
if a person is taking ketoconazole and carbamazepine at the same time, what happens?
carbamazepine induces the activity of CYP 3A4, meaning that ketoconazole is metabolized faster than expected, also eliminated from the body faster
50
what three things can drugs interact with?
other drugs with food with disease
51
can drug-drug interactions be positive and negative?
yes
52
what is a synergistic effect?
when two drugs complement the effects of each other
53
diuretics also cause potassium loss, known as
hypokalemia
54
what is given when hypokalemia is caused by a water pill
"potassium-sparing diuretic" this enhances the effect of the original water pill (case of loop diuretic)
55
notable side effect of statins?
muscle damage myopathies rhabdomyolysis
56
what do tetracyclines interact with?
calcium ions if a person takes milk or dairy products with tetracycline, it prevents the drug from working
57
what are MAO inhibitors
drugs used in treating depression and parkinsons disease
58
what are examples of MAO inhibitors
tranylcypromine (parnate) isocarboxazid (marplan) phenelzine (nardil)
59
what do MAO inhibitors interact with?
tyramine
60
what is tyramine
amino acid that helps regulate blood pressure
61
what does a patent mean
company that developed the drug has legal control over the ingredient produced in the med
62
what happens when a patent expires
competitor pharmaceutical companies can now produce the med at a cheaper cost
63
what is different in generic and brand meds?
excipients differ
64
what is the half life?
how long it takes a med to reduce by 50 percent in pt body