asthma drugs clinical pharmacology

Upload: crystalshe

Post on 08-Jul-2018

214 views

Category:

Documents


0 download

TRANSCRIPT

  • 8/19/2019 Asthma Drugs Clinical Pharmacology

    1/3

    1. inhaled

    corticosteroids direct

    MOA

    inhibit (cytokine-induced)

    production of inflammatory proteins

    2. pharm agents causing ASA, Beta blockers

    3. physical triggers cold air, exercise

    4. physiologic triggers(4)

    stress, GERD, URI, rhinitis

    5. factors influencing

    dev/exp - host

    genetic, gender, obesity

    6. inflam cells in asthma mast, eosino/baso/neutrophils,

    platelets, TH2

    7. mediators histamine

    LTE

    Kinins, endothelin, prosanoids

    8. diagnosis >12% reversibility or increase in

    FEV1 of 200c

    9. obstructive pattern reduced FEV1/FVC ratio w/ albuterol

    10. restrictive pattern reduced FVC (normal ratio) w/

    albuterol

    11. methacholine

    challenge

    bronchoprovocative test;

    20% or more decrease in FEV1

    12. Severe asthmatic

    episode - ABG

    pH down

    paCo2 down

    pa02down

    HCO3 way down

    13. sputum eosinophils, charcot-leyden crystals,

    inc IgE

    14. chest xray inc AP diam, dark (translucent)

    fields, depressed/flat diaphragm

    15. Step 1 - 4; symptom

    freq

    1; 2x per week

    3; daily

    4; continual

    16. Zone mgmnt

    green/yellow/red

    patient self monitoring system

    17. asthma classifications allergic, exercise induced, nocturnal

    18.

    non drug treatment,avoid triggers & treat

    aggravating

    allergies, GERD, rhinitis, viral RI

    19. drug types for asthma

    (6)

    beta agonists, corticosteroids, mast

    cell stabilizers, LTE modifiers,

    theophylline, anti IgE ab's

    20. Beta 2 agonists MOA G-protein receptors activates

    adenylyl cyclase/cAMP - >

    intercellular Ca ->

    bronchodiliation & mast cell

    stabilization

    21. mast cells filled w/ basophil granules

    22. short acting beta agonists relax smooth muscle,

    inc airflow in 30 sec; DOC for

    attacks

    23. indicates inadequate

    control

    > 1 canister/mth SABA

    24. dosing positive response is 200 ml increase or 12%

    increase in FEV1

    25. Beta2 agonists SE tremor

    heart palps

    hypokal

    O2 sat reduction

    26. SABAs - ALPMT

    (short goats on alp

    mountains)

    Albuterol

    Levalbuterol

    Pirbuterol

    Metaproterenol

    Terbutaline

    27. dosing levalbuterol

    (Xopenex) - only R

    isomer/active

    half of racemic albuterol - 0.63

    mg, 1.25 mg (3X cost)

    28. LABAs - AFAS Albuterol ER

    Formoterol

    Aformoterol,

    Salmeterol,

    29. LABA's considerations not monotherapy;

    only if cannot be controlled

    otherwise

    shortest duration & taper off 

    30. LABAs - COPD only Formoterol

    Aformoterol

    31. combo LABA &

    corticosteroids (3)

    Symbicort, Dulera, Adv air

    32. Symbicort Formoterol & Budesonide

    33. Advair Salmeterol & Fluticasone

    34. Dulera Formoterol & Mometasone

    (asthma only)

    35. combo LABA & steroid for

    asthma only

    Dulera

    36. inhaled corticosteroids

    direct MOA

    inhibit cytokine (ind uced

    prod of pro-inflamm proteins)

    37. inhaled corticosteroids

    indirect MOA (4)

    alter m-RNA prod

    suppress inflam

    produce anti-inflam mediator

    increase B2 receptors,

    decrease mucous

    38. mild asthma - once a day

    inhaled steroid options

    budesonide

    ciclesonide

    mometasone furoate

    Clin Pharm Asthma DrugsStudy online at quizlet.com/_1xtwci

  • 8/19/2019 Asthma Drugs Clinical Pharmacology

    2/3

    39. corticosteroids

    SEs

    thrush; hypergly

    adrenal suppress

    osteoporosis

    elev WBC

    40. corticosteroids -

    dosing therapy

    oral or IV "burst" therapy

    41. corticosteroids

    dosing strategylong term

    step down: after controlled

    dec 25% every 2 wks (8wks min)

    42. methylxanthines

    include

    caffeine, theophylline, theobromine

    43. methylxanthine -

    indication

    adjuvant to inhaled steroids

    alt to LABA to control nocturnal

    symptoms

    44. methylxanthines

    MOA (3)

    phosphodiesterase inhib, inc CAMP->

    inhibits LTE broncho/vasodilate, cardiac

    stim, vasodilate

    blockade adenosine receptors

    Ca+ released from sarcoplasm

    45. theophylline SE's -

    7 NITSCHA

    N/V

    insomnia

    tremors

    seizures

    confusion

    HA

    arrhyth

    46. theophylline -

    concern

    narrow therapeutic window; monitor

    conc

    47. theophylline -

    interaction

    is a Cyp 450 substrate; many interactions

    48. theophylline -

    CYP450

    interaction

    causes

    inhibitors inhibit liver metabolism;

    increase Theo levels

    inducers enhance ......cause decreased

    Theo

    49. theophylline -

    avoid CY450

    INHIBITORS

    (inhibited hide

    FACE Very well)

    Fluvoxamine

    Amiodarone

    Cipro

    Erythromycin

    Verapamil

    50. theophylline -

    avoid CY450

    INDUCERS

    (PCPR - induce

    halluc)

    Phenytoin

    Phenobarbital

    CBZ

    Rifampin

    51. theophylline -

    disease state

    interactions

    smoking, hyperthy - dec Theo

    CHF, liver disease - inc Theo

    52. cromolyn (intal) - class

    nedocromil (tilade)

    mast cell stabilizer

    (no inherent bronchodilation)

    53. cromolyn MOA blocks Cl channels

    blocks histamine release from

    mast cells

    54. cromolyn SE bad taste; GI

    55. Montelukast (Singulair) -

    class

    Zafirlukast (Accolate)

    LTE receptor antagonists

    56. Zileuton (zyflo) - class LTE receptor antagonists

    5-lipoxygenase inhibitor -

    reduces synthesis

    57. Zileuton (zyflo) interaction inhibits metabolism of 

    theophylline & warfarin

    (increases levels)

    58. LTE antagonists - not

    indicated for

    acute attacks

    59. Montelukast vs Zafirlukast Montelukast more favorable;

    can be used in kids 2-5 yrs

    60. Ipratropium - class antimuscarinic (atropine - like)

    61. Ipratroprium - indication quick relief; additive to beta

    agonists

    62. Omalizumab (xolair) - class IgE antibody inhibitor

    63. Omalizumab MOA binds IgE on mast

    cells/basophils; prevents

    release

    64. Omalizumab - indication persistent, mod-severe

    allergic asthma not controlled

    on oral steroids

    65. Omalizumab dosage every 2-4 weeks; half-life 26

    days

    66. Omalizumab concern very expensive

    67. Omalizumab dosage based

    on

    IgE serum levels -but 1+ yr

    post treat

    68. Omalizumab SE HA

    injection site rxn

    URI arthralgia

    69. MOA of Omalizumab

    (Xolair)?

    Inhibits binding of IgE to the

    high affinity IgE receptor onsurface of mast cells and

    basophils

    70. Which type of patient

    should use Omalizumab

    (Xolair)?

    Patient with moderate-severe

    persistant allergic asthma not

    controlled by inhaled steroids

    71. When prescribing Inhibitors

    of IgE antibodies, what

    should the dosing be based

    on?

    IgE serum levels and body

    weight

  • 8/19/2019 Asthma Drugs Clinical Pharmacology

    3/3

    72. T/F: Inhibitors of IgE antibodies are cost

    effective for the patient

    False: They are about $600 per 1 150mg. vial

    73. Intermittent Asthma - Step 1 Tx SABA as PRN

    74. Intermittent Asthma - Step 1, w/ mod/sev viral

    inf Tx

    SABA PRN

    short course systemic steroids

    75. mild persistent asthma - Step 2 Tx daily long term control

    inhaled steroids or (cromolyn or nedocromil)

    Zafirlukast or zileuton in adults (12+YOA)

    76. mod persistant asthma - Step 3 Tx increased inhaled steroids or

    add LABA or

    add nedocromil

    77. mod persistant asthma - Step 3 not controlled

    Tx

    increase to high dose inhaled steroids

    add LABA (servent or theophylline)

    78. severe persistent asthma - Step 4 Tx Add oral systemic steroids

    monitor closely

    79. LABA black box warning inc risk for asthma-related deaths; only for uncontrolled (w/ inhaled corticostero

    or 2+ maintenance meds)

    80. Acute asthma exacerbation; FEV1 or PEF < 50% -Tx

    O2 90-95% satinhaled SABA or cont albuterol

    oral systemic steroids (prednisone)

    anti-cholinergics (never alone)

    81. which drugs specifically not recommended for

    acute asthma

    methylxanthine/theophylline

    mucolytic

    sedation

    abx

    82. aggressive hydration in acute asthma not reco'd adu lts; maybe infants/children