Pulmonary Pharmacology Hit List Flashcards
Asthma & COPD
Epinephrine
Class
Bronchodilators
Asthma & COPD
Epinephrine
Mechanism
Adrenergic agonists – Non-specific
Increase cAMP, some inhibitory effect on mast cells, some inhibitory effect on microvascular permeability, promote a small degree of mucociliary transport
Asthma & COPD
Epinephrine
Route/Time
30-90 min duration; mist form
Asthma & COPD
Epinephrine
Adverse Rxns:
N/V, headache, fall in BP, increase HR, cardiac arrhythmias, PaO2 may decrease, CNS toxicities
Asthma & COPD
Albuterol
Class
Bronchodilators
Asthma & COPD
Albuterol
Mechanism
Adrenergic agonists – B2 specific, quick onset, short acting.
Rescue medication
Asthma & COPD
Albuterol
Route/Time
Quick onset, 3-6 hour duration
Asthma & COPD
Salmeterol
Class
Bronchodilators
Asthma & COPD
Salmeterol
Mechanism
Adrenergic agonists – B2 specific, slow onset, long-acting.
Asthma & COPD
Salmeterol
Route/Time
Long-acting used in combination w/ corticosteroids
12+ hour duration
Asthma & COPD
Formoterol
Class
Bronchodilators
Asthma & COPD
Formoterol
Mechanism
Adrenergic agonists – B2 specific, slow onset, long-acting
Asthma & COPD
Formoterol
Route/Time
Long-acting used in combination w/ corticosteroids
12+ hour duration
Asthma & COPD
Ipratropium
Class
Bronchodilators
Asthma & COPD
Ipratropium
Mechanism
Cholinergic Antagonists / Anti-muscarinics
Reduces airway constriction, decrease in mucous secretion, enhance B2 mediated dilation, can cause pupillary dilation and cycloplegia on contact
Asthma & COPD
Theophylline
Class
Bronchodilators & Anti-Inflammatory
Asthma & COPD
Theophylline
Mechanism
Methlxanthines (related to caffeine)
Increases cAMP, blocks muscle adenosine receptors, causes bronchodilation, anti-inflammatory; increases CNS activity, increases gastric acid secretion, has a weak diuretic effect
Asthma & COPD
Theophylline
Adverse Rxns:
Dose: 5-10ug/m
5-10ug/ml can cause N/V, nervousness, headache, insomnia
Asthma & COPD
Theophylline
Adverse Rxns:
Dose: greater than 20 ug/mL
Serum levels greater than 20 ug/mL cause vomiting, hypokalemia, hyperglycemia, tachycardia, cardiac arrhythmias, tremor, neuromuscular irritability, seizures
Asthma & COPD
Cromolyn sodium
Class
Anti-inflammatory
Asthma & COPD
Cromolyn sodium
Mechanism
May alter the activity of chloride channels, inhibit degranulation of mast cells in the lung, inhibit inflammatory response by acting on eosinophils, inhibit cough by action on airway nerve, reduce bronchial hyperactivity associated w/ exercise and antigen-inhaled asthma
Asthma & COPD
Cromolyn sodium
Adverse Rxns:
Unpleasant taste, no systemic toxicity, irritation of trachea, rarely – chest pain, restlessness, hypotension, arrhythmias, NV, CNS depression, seizures, anorexia
Asthma & COPD
Beclomethasone
Class
Corticosteroid
Asthma & COPD
Prednisolone
Class
Corticosteroid
Asthma & COPD
Monteleukast
Class
Leukotriene Receptor Blocker – Anti-inflammatory
Asthma & COPD
Monteleukast
Mechanism
LTD4 activation bronchial hyper-reactivity, bronchoconstriction, mucosal edema, increased mucus secretion
Asthma & COPD
Monteleukast
Effective in some patients
To reduce aspirin-related asthma
Asthma & COPD
Monteleukast
Adverse Rxns:
GIT, laryngitis, pharyngitis, nausea, otitis, sinusitis, viral infections
Asthma & COPD
Monteleukast
Unusual Adverse Rxn:
Possible association w/ suicide ideation
High doses tumorigenic in rodents
Asthma & COPD
Zileuton
Class
Leukotriene Synthesis Blocker – Anti-inflammatory
Asthma & COPD
Zileuton
Mechanism
Inhibits leukotriene formation, decreases smooth muscle contraction and blood vessel permeability, reduces leukocytes migration to damaged areas.
Asthma & COPD
Zileuton
Adverse Rxn:
Causes hepatic enzyme elevation – LFTs required
Asthma & COPD
Zileuton
Interactions:
CYP1A2 interaction w/ theophylline; evaluation for other inflammation-related diseases
Asthma & COPD
Omalizumab
Class
Anti-IgE antibody
Asthma & COPD
Omalizumab
Mechanism
Binds to IgE and prevents release of inflammatory mediators decreases allergic response
Reduces the frequency & severity of asthma attacks
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Cyclophosphamide
Class
Alkylating agent
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Cyclophosphamide
Mechanism
Produces B & T cell lymphopenia, suppression of B cell activity and decreased Ig secretion; associated with neutron- thrombocytopenia, bladder cancer, myeloproliferative malignancie s
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Cyclophosphamide
Adverse Rxn:
Hemorrhagic cystitis is a frequent complication, but this is prevented by adequate fluid intake and mesna.
Can cause diarrhea.
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Ambrisentan
Class
Endothlin-1 Receptor Antagonist
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Ambrisentan
Mechanism
Blocks smooth muscle proliferation and pulmonary artery vasoconstriction by binding to endothliun-1 type A (smooth muscle) and type B (endothelial cells)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Ambrisentan
Route
Orally active
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Ambrisentan
Black Box Warning
Teratogenic (category X)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Beractant
Class
Exogenous surfactant
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Beractant
Mechanism/Target
Administered to preterm (<30 weeks) infants to reduce pulmonary surface tension; purified animal-derived products rich in surfactant proteins B, and C, neutral lipids, surface active PLs, and DPPC (primary surface active component)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Epoprostenol
Class
Prostanoid for PAH
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Epoprostenol
Mechanism
Prostanoids induce pulmonary artery vasodilation, retard smooth muscle growth and disrupt platelet aggregation.
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Epoprostenol
Route/Time
Half life of 3-5 minutes, requires continuous IV infusion
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Epoprostenol
Dose limiting
Hypotension, muscle pains, headache, flushing
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Tadalafil
Class
Phosphodieterase type 5 inhibitors
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Tadalafil
Treatment
Tx of benign prostatic hypertension and erectile dysfunction
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Tadalafil
Side effect
Headache is most common side effect
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Tadalafil
Time
Halflife 17 hours
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Tadalafil
Unusual Adverse Rxn
Change in color vision due to non-arteritic anterior ischemic optic neuropathy (NAION)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Methotrexate
Class
Immunosuppressent
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Methotrexate
Mechanism
DHFR inhibition, additional actions that increase adenosine-mediated immunosuppression (increase in cAMP)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Methotrexate
Treatment
Tx for sarcoidosis (non-caseating granulomas)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Methotrexate
Significant side effects
– NOT a front-line therapy
High-dose intravenous methotrexate chemotherapy acute kidney failure and severe and life-threatening CNS toxicity.
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Iloprost
Class
Prostanoid for PAH
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Iloprost
Mechanism
Prostanoids induce pulmonary artery vasodilation, retard smooth muscle growth and disrupt platelet aggregation
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Iloprost
Time
Halflife of 25 minutes, requires 6-9 inhaled doses/ day (10 min per dose)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Iloprost
Side effects
Cough, flushing, headache are common, hypotension, muscle cramps, bleeding, reports of hemoptysis
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Diltiazem
Class
Calcium Channel Blocker (CCB)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Diltiazem
Mechanism
CCB – prevent membrane depolarization, block the key mediator of smooth muscle contraction allowing vasodilation to endure; not all patients respond to these drugs, some develop hemodynamic decompensation
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Diltiazem
Time/Route
Halflife 3-6 h, PO TID
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Diltiazem
Side effects
CYP3A4
Bradycardia, headache, edema, hypotension
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Rituximab
Class
mAb against CD20 on B cells
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Rituximab
Mechanism
mAb that binds CD20 on M cell precursors and mature B cells) Depletion lasts 6-9 months (depletion via 2 mechanisms: ACDC, complement mediated MAC, induction of apoptosis)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Rituximab
Can cause
HTN, asthenia, pruritis, urticarial, rhinitis, arthralgia
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Rituximab
Treatment
tx for Wegener’s granulomatosis
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Treprostinil
Class
Prostanoid for PAH
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Treprostinil
Mechanism
Prostanoids induce pulmonary artery vasodilation, retard smooth muscle growth and disrupt platelet aggregation
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Treprostinil
Route/Time
Halflife of 4 hours, continuous SC or IV infusion
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Treprostinil
Injection site rxns;
Headache, nausea, diarrhea, vasodilation, jaw pain,
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Treprostinil
Monitor
monitor for bleeding, decreased clearance w/ gemfibrozil
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Azathioprine
Class
Facilitates apoptosis of T cell populations
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Azathioprine
Mechanism
DNA, RNA synthesis inhibitor
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Azathioprine
Associated
associated w/ neoplastic, mutagenic, and leukopenic & thrombocytopenic toxicity; increases the risk of infection
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Bosentan
Class
Endothlin-1 Receptor Antagonist
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Bosentan
Mechanism
Blocks smooth muscle proliferation and pulmonary artery vasoconstriction by binding to endothliun-1 type A (smooth muscle) and type B (endothelial cells)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Bosentan
Route/Time
Orally active
5-8 hours; PO BID
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Bosentan
BBW/Side effects
Teratogenic (category X)
Liver and blood toxicities
Significantly elevated LFTs, anemia, naopharyngitis, interactions w/ CYP2C9 and 3A4 substrates; leading cause of drug-drug interactions
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Amlodipine
Class
Calcium Channel Blockers (CCB)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Amlodipine
Mechanism
CCB – prevent membrane depolarization, block the key mediator of smooth muscle contraction allowing vasodilation to endure;
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Amlodipine
Time
Halflife 35-50 hours
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Amlodipine
Adverse Rxn
Not all patients respond to these drugs, some develop hemodynamic decompensation
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Amlodipine
Side effects
CYP3A4
Edema, fatigue, hypotension
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Verapamil
Class
Calcium Channel Blockers (CCB)
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Verapamil
Mechanism
CCB – prevent membrane depolarization, block the key mediator of smooth muscle contraction allowing vasodilation to endure
Drugs for Restrictive Lung Diseases
& Pulmonary Artery Hypertension
Verapamil
Side effects
Headaches, facial flushing, dizziness, lightheadedness, swelling, increased urination, fatigue, nausea, ecchymosis, galactorrhea, and constipation
Diphenhydramine
Class
Antihistamines
1st generation
Antitussive
Ether/ Ethanolamine derivative
Diphenhydramine
Mechanism
Based on structure of histamine – short lived, multiple dosing, H1 blockade.
Antihistamine-H1 antagonist, suppresses cough by action on the respiratory center due to its anticholinergic effect
Diphenhydramine
Side effects
Side Effects – drowsiness, respiratory distress, blurred vision, dry mouth, urinary retention
Diphenhydramine
Time
Duration 4-6 hours
Dimenhydrinate
Class
Antihistamines
1st generation
Ether/ Ethanolamine derivative
Dimenhydrinate
Mechanism
Based on structure of histamine – short lived, multiple dosing, H1 blockade
Dimenhydrinate
Side effects
Highly sedative, anticholinergic side effects Sedative Anticholinergic GI Can potentiate nasal congestion
Dimenhydrinate
Time
Duration 4-6 hours
Chlorpheniramine
Class
Antihistamines
1st generation
Alklamine
Chlorpheniramine
Mechanism
Based on structure of histamine – short lived, multiple dosing, H1 blockade
Chlorpheniramine
Side effects
Highly sedative, anticholinergic side effects Sedative Anticholinergic GI Can potentiate nasal congestion
Chlorpheniramine
Time
Duration 4-6 hours
Hydroxyzine
Class
Antihistamines
1st generation
Piperzine derivative – much longer duration: 4-24 hours
Hydroxyzine
Mechanism
Based on structure of histamine – short lived, multiple dosing, H1 blockade
Hydroxyzine
Side effects
Highly sedative, anticholinergic side effects Sedative Anticholinergic GI Can potentiate nasal congestion
Hydroxyzine
Time
Much longer duration: 4-24 hours
Fexofenadine
Class
Antihistamines
2nd generation
Fexofenadine
Mechanism
Divergent structures, different from histamine, longer therapeutic doses,interactions H1 blockade
Anti-asthmatic
Fexofenadine
Side effects
Limited or nonsedating, enhanced safety profiles (cardiac arrhythmias, drug-drug
Has only mild cognitive disturbances
-adine
-stine
Fexofenadine
Time
Duration 8-24 hours
Desloratadine
Class
Antihistamines
2nd generation
Desloratadine
Mechanism
14-7x greater binding to H1 receptors than loratadine
15-50 fold lower affinity for muscarinic receptors compared w/ H1 receptors
Desloratadine
Side effects
Limited or nonsedating, enhanced safety profiles (cardiac arrhythmias, drug-drug
Has only mild cognitive disturbances
-adine
-stine
Desloratadine
Time
Long elimination halflife = 27 hours
Cetirizine
Class
Antihistamines
2nd generation
Cetirizine
Mechanism
Divergent structures, different from histamine, longer therapeutic doses,interactions H1 blockade
Anti-asthmatic
Cetirizine
Side effects
Limited or nonsedating, enhanced safety profiles (cardiac arrhythmias, drug-drug
Has only mild cognitive disturbances
-adine
-stine
Cetirizine
Time
Duration 8-24 hours
Azelastine
Class
Antihistamines
2nd generation
Azelastine
Mechanism
Divergent structures, different from histamine, longer therapeutic doses,interactions H1 blockade
Anti-asthmatic
Azelastine
Side effects
Limited or nonsedating, enhanced safety profiles (cardiac arrhythmias, drug-drug
Has only mild cognitive disturbances
-adine
-stine
Azelastine
Time
Duration 8-24 hours
Cough Suppressants, Degongestants
& Mucolytics
Acetaminophen
Class
Mild analgesic
Cough Suppressants, Degongestants
& Mucolytics
Acetaminophen
Mechanism
Inhibition of cyclooxygenase (COX), and recent findings suggest that it is highly selective for COX-2.
Cough Suppressants, Degongestants
& Mucolytics
Acetaminophen
Treatment
Fever, pain, myalgia, and headache.
Cough Suppressants, Degongestants
& Mucolytics
Acetaminophen
Adverse Rxns:
Metabolized by the liver and is hepatotoxic; side effects are multiplied when combined with alcoholic drinks.
Cough Suppressants, Degongestants
& Mucolytics
Acetaminophen
Time
The onset of analgesia is approximately 11–29.5 minutes after oral administration and its half-life is 1–4 hours.
Diphenhydramine
Contraindicated
Prostate hypertrophy, urinary obstruction, asthma, COPD, peptic ulcer, MAOIs
Cough Suppressants, Degongestants
& Mucolytics
Dextromethorphan
Class
Antitussive
Cough Suppressants, Degongestants
& Mucolytics
Dextromethorphan
Mechanism
Suppresses cough reflex via direct action on the cough center in the medulla of the brain. Metabolized by CYP2D6 into active metabolite dextrorphan
Cough Suppressants, Degongestants
& Mucolytics
Dextromethorphan
Contraindications:
MAOIs, antidepressants, respiratory insufficiency, HS White margin of safety (12-75x of TD to produce halllucinations.
Cough Suppressants, Degongestants
& Mucolytics
Dextromethorphan
Time
Onset: 15-30 min, duration 3-6 hours
Cough Suppressants, Degongestants
& Mucolytics
Codeine
Class
Opoid analgesic, Antitussive
3-methylmorphine
Cough Suppressants, Degongestants
& Mucolytics
Codeine
Mechanism
Suppresses cough by action on the respiratory center
10% is converted to morphine
Cough Suppressants, Degongestants
& Mucolytics
Codeine
Side effects
Constipation, sedation, histamine release, vasodilation, orthostatic hypotension, dizziness
Cough Suppressants, Degongestants
& Mucolytics
Camphor
Class
Topical Agent = ointment, lozenges, inhalation
Cough Suppressants, Degongestants
& Mucolytics
Camphor
Mechanism
Rub on throat and chest as a thick later, not used in nostrils or mouth
Cough Suppressants, Degongestants
& Mucolytics
Menthol
Class
Topical Agent= ointment, lozenges, inhalation
Cough Suppressants, Degongestants
& Mucolytics
Menthol
Mechanism
Rub on throat and chest as a thick later, not used in nostrils or mouth
Cough Suppressants, Degongestants
& Mucolytics
Pseudoephedrine
Class
Nasal decongestant
Cough Suppressants, Degongestants
& Mucolytics
Pseudoephedrine
Mechanism
Vasoconstricive drug that reduces nasal congestion, does not affect the release of histamine or other mediators in the allergic reaction, commonly formulated with antihistamines
Alpha-adrenergic agonist
Acts primarily by releasing NE from adrenergic nerves
Cough Suppressants, Degongestants
& Mucolytics
Pseudoephedrine
Metabolized
Metabolized to a minor extent, 88% excreted unchanged in the urine
Cough Suppressants, Degongestants
& Mucolytics
Pseudoephedrine
Time
Better bioavailability – but both have a short half-life, with a peak at 0.5-2 hours
Cough Suppressants, Degongestants
& Mucolytics
Pseudoephedrine
Side effects:
Side effects: CV stimulation, CNS stimulation, rebound congestion (ischemic as a result of vasoconstriction of the drug or local irritation of the drug)
Behind the Counter OTC product to reduce use in meth
Cough Suppressants, Degongestants
& Mucolytics
Phenylephrine
Class
Nasal decongestant
Cough Suppressants, Degongestants
& Mucolytics
Phenylephrine
Mechanism
Acts by directly stimulating adrenergic receptors on postsynaptic sites
Cough Suppressants, Degongestants
& Mucolytics
Phenylephrine
Metabolized
Rapidly metabolized by MOA and COMT in the GI mucosa, liver, and other tissues
Cough Suppressants, Degongestants
& Mucolytics
Oxymetazoline
Class
Topical nasal decongestant
Cough Suppressants, Degongestants
& Mucolytics
Oxymetazoline
Adverse Rxn
Do not use for more than 3-5 days because it can cause rhinitis medicamentosa
Cough Suppressants, Degongestants
& Mucolytics
Oxymetazoline
Preferred Treatment
Preferred agent during pregnancy
Cough Suppressants, Degongestants
& Mucolytics
Guaifenasin
Class
Expectorants
Mucinex
Cough Suppressants, Degongestants
& Mucolytics
Guaifenasin
Mechanism
Symptomatic relief of ineffective productive coughs, not used for chronic coughs, loosens and thins lower respiratory tract secretions by increasing volume and reducing volume of secretions.
Cough Suppressants, Degongestants
& Mucolytics
Guaifenasin
Trivia
In veterinary medicine, used to induce and maintain anesthesia in horses
Cough Suppressants, Degongestants
& Mucolytics
Acetyl cysteine
Class
Mucolytic
Cough Suppressants, Degongestants
& Mucolytics
Acetyl cysteine
Mechanism
Use in diseases with increased mucus production – cystic fibrosis, COPD, Bronchiectasis, Respiratory infections, TB.
Break H bonds by substituting a sulfhydryl radical-HS
Cough Suppressants, Degongestants
& Mucolytics
Acetyl cysteine
Route
Given aerosol or by direct instillation into the ET tube
Cough Suppressants, Degongestants
& Mucolytics
Acetyl cysteine
Unique Treatment
Given orally to reduce liver injury w/ acetoaminophen (Tylenol) overdose
Cough Suppressants, Degongestants
& Mucolytics
Acetyl cysteine
Side effects
Side effects – bronchospasm (asthma) – if used with asthma, use 10% with bronchodilator
Side Effects – increase mucus production (be prepared to suction a patient who cannot cough), do not mix with antibiotics in the same nebulizer, disagreeable odor due to the hydrogen sulfide, N/V
Cough Suppressants, Degongestants
& Mucolytics
Amiloride
Class
Aersolized Diuretic/ sodium channel blocker
Cough Suppressants, Degongestants
& Mucolytics
Amiloride
Mechanism
Diuretic that can be given by aerosol to patients w/ CF, sodium channel blocker.
In CF, sodium is absorbed into the epithelium along with water, leaving the mucus thick and dehydrated – but by blocking the absorption, dehydration of the mucus is prevented
Cough Suppressants, Degongestants
& Mucolytics
Amiloride
Route
The drug is dissolved in 0.3% NaCl solution and nebulized
Treatment of Tuberculosis
Rifampin
Class
RIF
Treatment of Tuberculosis
Rifampin
Mechanism
Inhibition of RNA synthesis, binds the beta subunits of RNA polymerase
Bactericidal for IC and EC bacteria
Resistance – DNA dependent RNA polymerase does not bind drug
Never given as a single agent due to resistance
Treatment of Tuberculosis
Rifampin
Route/Time
Abs – oral, impaired by food & para-aminosalicylic acid (admin 8-12 hours apart)
Treatment of Tuberculosis
Rifampin
Tissues/Metabolized
Penetrates all tissues well including CSF (meningitis)
Metabolized – de-acetylated in liver (halflife increased by hepatic dysfunction/ de-acetylated rifampin still has full antibacterial activity but is not resorbed
Excreted primarily in bile, small amount renal tubular secretion, but no adjustment w/ renal failure
Treatment of Tuberculosis
Rifampin
Adverse effects
Discolors body fluids – orange/red tears, urine, saliva), GI disturbances, CND complains, Hepatotoxic (more relevant in slow acetylators);
Treatment of Tuberculosis
Rifampin
Drug interactions
Induces P450 (within 2 weeks of drug use), reduces the halflife of prednisone, BBs, suldonamides, dapsone, NNRTIs
Probenecid increases serum levels of rifampin
Rifabutin has less effect on the metabolism of HIV protease inhibitors
Treatment of Tuberculosis
Rifampin
Other indications:
MRSA, MRSE, prophylaxis of household members exposed to memingococci or H. influenza, eradication of staph in nasal carriers
Treatment of Tuberculosis
Isoniazid
Class
INH
Treatment of Tuberculosis
Isoniazid
Mechanism
Interferes w/ mycolic acid synthesis – disrupts cell wall synthesis; cidal for rapidly dividing bacilli; extracellular cavitary lesions; static for slowly growing lesions; penetrates host cells – effective for intracellular bacilli
Treatment of Tuberculosis
Isoniazid
Resistance
Inability to take up the drug, alteration of target enzyme, overproduction of target enzyme, emerges rapidly (INH is never used as a single agent in active infections) – 1/10^6 will develop resistance, and the average cavitary lesion has 100 million bacteria
Treatment of Tuberculosis
Isoniazid
Absorbed/Distributed
Absorbed rapidly from the GI tract with oral dose or can be given IM.
Distributed to all tissues/ fluids (including placenta, meninges in meningitis, breast milk)
Treatment of Tuberculosis
Isoniazid
Metabolism
Acetylated via N-acetyl transferase (some people are fast metabolizers, some are slow – slow metabolizers have levels 2-3 times higher)- determines halflife of 1-5 hours
Treatment of Tuberculosis
Isoniazid
Excretion
Drug and inactive metabolites excreted in the urine (~75%) – no adjustment w/ renal failure
Treatment of Tuberculosis
Isoniazid
Adverse effects
Peripheral neuropathy due to competition w/ pyridoxical phosphate (corrected w/ B6 admin) – more frequent in malnourishment
Hepatotoxic (2% major toxic rxn to metabolite)
Treatment of Tuberculosis
Isoniazid
Interactions w/:
Antacids w/ Al3+ salts decrease absorption; administer 1h before any antacids
Corticosteroids decrease efficacy
Inhibits P450 that metabolizes phenytoin, diazepam, fluoxentine, nelfinavir
Treatment of Tuberculosis
Pyrazinamide
Class
PZA
Treatment of Tuberculosis
Pyrazinamide
Mechanism
Bacilli convert pyrazinamide to pyrazinoic acid, decreasing pH and inhibiting growth; resistant strains may lack pyrazinamidase/ cidal or static depending onconcentration in infected site
Treatment of Tuberculosis
Pyrazinamide
Active against
Active against tubercle bacilli in acid environment of lysosome & macrophage (most significant effect at intracellular sites where MTB replicates slowly)
Treatment of Tuberculosis
Pyrazinamide
Route/Time
Well/ rapidly absorbed within 2 hours & widely distributed- including to CSF
Treatment of Tuberculosis
Pyrazinamide
Metabolized
Metabolized in liver, excreted in urine via glomerular filtration
Treatment of Tuberculosis
Pyrazinamide
Adverse effects
Dose related hepatotoxicity (most severe rxn), mild non gouty arthalgias, hyperuricemia is usually asymptomatic
Treatment of Tuberculosis
Ethambutol
Class
EMB
Treatment of Tuberculosis
Ethambutol
Mechanism
Inhibition of RNA synthesis. Disrupts cell wall synthesis – inhibits arabinosyl transferase, necessary for peptidoglycan units of cell wall resulting in increased cell wall permeability
Static, possibly cidal at high levels
Bacilli must be actively dividing
Treatment of Tuberculosis
Ethambutol
Esistance
Slow development of resistance
No cross resistance
Treatment of Tuberculosis
Ethambutol
Absorption/Elimination
Absorption of 75% dose, concentrates in kidneys, lungs, saliva, therapeutic levels in CSF with inflamed meninges , placenta, breast milk.
Elimination – partly metabolized in the liver, excreted in the urine, T1/2 of 3.5 hours
Treatment of Tuberculosis
Ethambutol
Adverse Rxn:
Optic neuritis, dose related, decreased visual acuity, loss of color discrimination – monthly visual exams- reversible weeks to months after therapy, can cause allergic rxns, hyperuricemia, drug interactions (Al3+ containing antacids reduce absorption
Treatment of Tuberculosis
Cycloserine
Class
Antiobiotic Second line drub TB
Treatment of Tuberculosis
Cycloserine
Mechanism
Blocks cell wall synthesis; structural analog of D-alaninel can block enzymes, L-alanine racemase & D-alanine synthetase/ enzymes for D-alanine incorporation into pentapeptide or peptidoglycan strands
Depending on conc – cidal or static
Treatment of Tuberculosis
Cycloserine
Effective
Effective in resistant organisms – no cross-resistance
Broad spectrum, second-line agent, active against pulmonary and extra-pulmonary TB
Treatment of Tuberculosis
Cycloserine
Treatment
Only used when other treatments fail – MDR-TB (INH, RIF-R)
Used against mycobacterium avium
Used to treat UTIs
Treatment of Tuberculosis
Cycloserine
Route
Administered orally w/ good absorption (70-90%)
Distributed widely & not protein bound
Lungs, pleura, synovial fluid, CSF more when inflamed/ excreted unchanged –renal – dose adjustment in renal failure
Treatment of Tuberculosis
Cycloserine
Adverse effects
Adverse effects – involve CNS – reversible when therapy is discontinued- Headache, tremor, vertigo, confusion, psychotic states w/ suicidal tendencies, paranoia, seizures (not for use in epileptic pts) – risk of suicide increased w/ depression / manifest within first 2 weeks
Treatment of Bacterial Infections
Amoxicillin
Class
Aminopenicillins
Cell wall
Treatment of Bacterial Infections
Amoxicillin
Route/Dose considerations
Can be taken with food unlike other penicillins
=dose is affected by the state of the kidneys or admin of other organic acids
Treatment of Bacterial Infections
Amoxicillin-clavulanate=Augmentin
Class
Aminopenicillins
Cell wall
Treatment of Bacterial Infections
Amoxicillin-clavulanate=Augmentin
Treatment/Side effects
MSSA, anaerobes
Can cause N/V in children
Treatment of Bacterial Infections
Ampicillin-sulbactam=Unasyn
Class
Aminopenicillins
Cell wall
Treatment of Bacterial Infections
Ampicillin-sulbactam=Unasyn
Treatment
Amp-R H influenza, mixed gram positive and anaerobic infections (CAP)
Treatment of Bacterial Infections
Carbapenem
Class
B-lactam
Cell wall
Treatment of Bacterial Infections
Carbapenem
Mechanism
Small hydroxyethyl side chain makes it easier for B lactam to move through complex outer membrane of GN bacteria.
Treatment of Bacterial Infections
Carbapenem
Resistance/Spectrum
High resistance to beta-lactamases
Broadest spectrum of the B-lactams
Treatment of Bacterial Infections
Carbapenem
Route/Metabolized
Give IV
Excreted by glomerular filtration and secretion
Drug formulated w/ cilastatin to inhibit hydrolysis in brush border
Treatment of Bacterial Infections
Carbapenem
Treatment
Active against GN and GP, not as a monotherapy for P aeruginosa/ resistant nosocomial gram-negative (Enterobacter) /
Combine w/ aminoglycoside to tx actinobacter
Treatment of Bacterial Infections
Carbapenem
Contra-indicated
Contra-indicated in patients w/ CNS seizures/ expensive
Treatment of Bacterial Infections
Ceftriaxone
Class
(Cell wall)
B-lactam
3rd generation cephalopsporin
Treatment of Bacterial Infections
Ceftriaxone
Mechanism
Same 4 membered B-lactam ring as penicillins w/ a 6 membered dihydrothizide ring – more chemical binding sites
More resistant to B-lactamases
Broader spectrum
Treatment of Bacterial Infections
Ceftriaxone
Penicillin Allergies
Effective in pts allergic to penicillin
Treatment of Bacterial Infections
Ceftriaxone
3rd Generation Benifits
1st 3rd = greater GN less GP / more resistance to B-lactamases / increased ability to enter CSF
Treatment of Bacterial Infections
Ceftriaxone
Treatment
Used for active infections – bacteremia, severe pulmonary infections use w/ aminoglycosidases, do not work against enterococci
Treatment of Bacterial Infections
Ceftriaxone
Route/Metabolized
Mostly IV/ IM (can be oral)
Renal Excretion
Treatment of Bacterial Infections
Clarithromycin
Class
Macrolide
Treatment of Bacterial Infections
Clarithromycin
Mechanism
Binds to 50S ribosomal subunit / Static
Treatment of Bacterial Infections
Clarithromycin
Route/Metabolized
More acid stable, rapid first pass metabolism (primary metabolite is still active), eliminated by kidney & liver
Absorption increases w/ food
Inhibits CYP P450 but not as much as erythromycin
Treatment of Bacterial Infections
Clarithromycin
Legionnaire’s disease Mycoplasma pneumonia Chlamydia pneumonia H influenza Strep pneumo & GAS Moraxella
Treatment of Bacterial Infections
Doxycycline
Class
Tetracycline
30S – protein synthesis
Treatment of Bacterial Infections
Doxycycline
Mechanism
First broad spectrum (GN & GP)
Bacteriostatic – binding to the ribosome 30s is reversible
Enters cell through porin channels
Treatment of Bacterial Infections
Doxycycline
Resistance
Resistance occurs slowly – can develop if the efflux pump is induced
Inhibited by di & tri-valent cations
Treatment of Bacterial Infections
Doxycycline
Route/Metabolized
Best absorbed in acidic conditions of the stomach
Hepatic elimination
Treatment of Bacterial Infections
Doxycycline
Adverse effects
Adverse – N/V – less w/ doxy
Superinfections, chelation of calcium (teeth discoloration/ depression of bone growth)
Some vestibular toxicity (minoclycine), photosensitivity (doxy)
Treatment of Bacterial Infections
Doxycycline
Treatment
Used for Atypical pneumonia (Mycoplasma, Legionells, Chlamydia), Lyme disease, acne, periodontal disease
Treatment of Bacterial Infections
Erythromycin
Class
Macrolide
Treatment of Bacterial Infections
Erythromycin
Mechanism
Binds to 50S ribosomal subunit / Static
Narrow spectrum
Treatment of Bacterial Infections
Erythromycin
Route/Metabolized
Admin orally, but increased acidity may inactivate
Well –distributed but not to CSF
Concentrates in liver (check liver functions)
Excreted in bile/ feces
Placenta/ breast milk
Treatment of Bacterial Infections
Erythromycin
One of few drugs that can?
Also crosses into?
One of few drugs to cross into prostatic fluid and accumulates in macrophages
Treatment of Bacterial Infections
Erythromycin
Treatment
Legionnaire’s disease Mycoplasma pneumonia Chlamydia pneumonia GP & GN atypical organisms Can be used to eliminate the carrier state w/ corynebacterium diphtheria
Treatment of Bacterial Infections
Erythromycin
Side effects
Epigastric distress is the most common side effect
Transient deafness
Big time inhibitor of CYP P450
Cholestatic hepatitis
Treatment of Bacterial Infections
Imipenem
Class
B-lactam
Cell wall
Treatment of Bacterial Infections
Imipenem
Contrindication
Advantage
Not used in patients w/ seizures
Does not need co-admin of cilastatin
Treatment of Bacterial Infections
Imipenem
Treatment
Best outcomes for Extended Spectrum Beta-lactam (ESBL) E coli & Klebsiella
Treatment of Bacterial Infections
Levofloxacin
Class
Newer Fluoroquinolone
Treatment of Bacterial Infections
Levofloxacin
Mechanism
Analog of quinolone nalidixic acid
Inhibition of bacterial DNA gyrase
Bactericidal
Treatment of Bacterial Infections
Levofloxacin
Resistance
Resistance via alterations in DNA gyrase enzyme (increases in SA and PA) = quinolone resistance-determining region (QRDR)
Resistance – not plasmid mediated – decreased porins, energy-dependent efflux
Treatment of Bacterial Infections
Levofloxacin
Route/Metabolized
Good oral absorption, wide distribution, decreased abs w/ antacids, poor CSF penetration, renal & liver excretion
Treatment of Bacterial Infections
Levofloxacin
Strep pneumo, Legionella, GN coverage similar to aminoglycosides – synergism w/ B-lactams
Treatment of Bacterial Infections
Meropenem
Class
(Cell wall)
B-lactam
Treatment of Bacterial Infections
Meropenem
Activity
Does not need co-admin of cilastatin
Less G+ activity
Less CNS px
Treatment of Bacterial Infections
Meropenem
Treatment
Best outcomes for Extended Spectrum Beta-lactam (ESBL) E coli & Klebsiella
Treatment of Bacterial Infections
Moxifloxicin
Class
Newer Fluoroquinolone
Treatment of Bacterial Infections
Moxifloxicin
Mechanism
Analog of quinolone nalidixic acid
Inhibition of bacterial DNA gyrase
Bactericidal
Treatment of Bacterial Infections
Moxifloxicin
Metabolism
Mostly hepatic clearance
Not used for UTIs
Hepatic elimination
Treatment of Bacterial Infections
Penicillin
Class
(Cell wall)
B-lactam
Treatment of Bacterial Infections
Penicillin
Metabolism
An acid administered as a salt w/ high doses – evaluate pt w/ HTN CHF exists as a non-absorble anion, K+ moves into the tubule in exchange for H+ hypokalemic alkylosis
Treatment of Bacterial Infections
Penicillin
Adverse Rxns
Can cause HS rxns, delayed allergic rxns, >2 days rash, more common with ampicillin & amoxicillin
Hives/ uticaria
Most life-threatening responses are caused by peritoneal drug admin
Drugs to Treat Lung Cancer
Bevacizumab
Treatment
Adenocarcinoma
Non-squamous NSCLC
Drugs to Treat Lung Cancer
Bevacizumab
Mechanism
Humanized antibody, binds VEGF, given IV
Inhibition promotes non-physiologic apoptosis of endothelial cells and decreases deposition of subendothelial matric making the vasculature more susceptible to severe bleeding
Drugs to Treat Lung Cancer
Bevacizumab
Contraindicated/Side effect
Risk of bleeding in squamous lung cancers – not approved
Can cause HTN
Drugs to Treat Lung Cancer
Carboplatin
Treatment
SCLC
Drugs to Treat Lung Cancer
Carboplatin
Mechanism
Forms DNA intra-strand cross-links and adducts
Drugs to Treat Lung Cancer
Carboplatin
Adverse Rxns
Allergic (platinum rxns)
Dose-related myelosuppression; cumulative anemia
Dose-related N/V
Blood chemistry dyscrasia, increase in hepatic enzymes, BUN & creatinine
Drugs to Treat Lung Cancer
Cisplatin
Treatment
SCLC/ NSCLC
Drugs to Treat Lung Cancer
Cisplatin
Mechanism
Forms DNA intra-strand cross-links and adducts
Drugs to Treat Lung Cancer
Cisplatin
Adverse Rxns
Dose-related severe nephrotoxicity, myelosuppression, N/V
Significant ototoxicity
Drugs to Treat Lung Cancer
Crizotinib
Treatment
Adenocarcinoma
Drugs to Treat Lung Cancer
Crizotinib
Mechanism
Reversible multi-kinase inhibitor, ALK
CYP3A4 inhibitor
Drugs to Treat Lung Cancer
Crizotinib
Route
Oral on empty stomach
Drugs to Treat Lung Cancer
Crizotinib
Adverse Rxn
Visual disorders are common
Drugs to Treat Lung Cancer
Cyclophosphamide
Treatment
SCLC
Drugs to Treat Lung Cancer
Cyclophosphamide
Mechanism
Pro-drug of active alkylating moiety
Drugs to Treat Lung Cancer
Cyclophosphamid
Adverse Rxns
Blood dyscrasias anemia Hemorrhagic cystitis (mesna) Infertility Monitor for 2ndary malignancies Pulmonary fibrosis
Drugs to Treat Lung Cancer
Doxorubicin
Treatment
SCLC
Drugs to Treat Lung Cancer
Doxorubicin
Mechanism
Intercalator, free radical generator, topo II inhibitor (DNA STRUCTURE)
Drugs to Treat Lung Cancer
Doxorubicin
Adverse Rxns
Myelosuppresion, Cumulative dose cause CHF Hepatic disease 2ndary malignancies Extravasational necrosis N/V
Drugs to Treat Lung Cancer
Erlotinib
Treatment
Adenocarcinoma
Drugs to Treat Lung Cancer
Erlotinib
Mechanism/Epidemiology
EGFR kinase inhibition
(lung cx) – most never smokers
Mutations high in Asian populations
Drugs to Treat Lung Cancer
Erlotinib
Route/Side effects
Oral, few side effects
Drugs to Treat Lung Cancer
Etoposide
Treatment
SCLC
Drugs to Treat Lung Cancer
Etoposide
Mechanism
DNA-topo II complex stabilizer
Drugs to Treat Lung Cancer
Etoposide
Side effects
Myelosuppression, infection
N/V
Diarrhea, alopecia
Drugs to Treat Lung Cancer
Gemcitabine
Treatment
NSCLC
Drugs to Treat Lung Cancer
Gemcitabine
Mechanism
DNA polymerase inhibitor via incorpotation of triphosphate form during DNA synthesis (DNA SYNTHESIS)
Drugs to Treat Lung Cancer
Gemcitabine
Adverse Rxns
Myelosuppression, arthralgia, sensory peripheral neuropathy
Drugs to Treat Lung Cancer
Ifosfamide
Treatment
SCLC
Drugs to Treat Lung Cancer
Ifosfamide
Mechanism
Intra- and Inter- strand cross-linker
Drugs to Treat Lung Cancer
Ifosfamide
Side effcts
Alopecia, N/V, blood dyscrasia infection
Drugs to Treat Lung Cancer
Ifosfamide
Adverse Rxn
Hemorrhagic cystitis is rare when ifosfamide is given together with mesna.
Dose-limiting side effect is encephalopathy
Drugs to Treat Lung Cancer
Irinotecan
Treatment
SCLC Myelosuppression and GI toxicity
Elevated liver functions and serum creatinine
Drugs to Treat Lung Cancer
Irinotecan
Mechanism
Prevents DNA from unwinding by inhibition of topoisomerase 1.
Drugs to Treat Lung Cancer
Irinotecan
Side effects
Myelosuppression and GI toxicity
Elevated liver functions and serum creatinine
Drugs to Treat Lung Cancer
Methotrexate
Treatment
SCLC
Drugs to Treat Lung Cancer
Methotrexate
Mechanism
Folic Acid analog
Dihydrofolate reductase inhibition (universal)
Folic acid essential dietary factor
Polyglutamation (which traps drug) also inhibits thymidylate synthase (TS) and 2 early enzymes in purine biosynthesis
Rescue other cells with Leucovorin
Drugs to Treat Lung Cancer
Methotrexate
Toxicity
Methotrexate is a highly teratogenic drug and categorized in pregnancy category X
Drugs to Treat Lung Cancer
Paclitaxel
Treatment
NSCLC
Drugs to Treat Lung Cancer
Paclitaxel
Mechanism
Micro tubule (MT) stabilizer inhibiting depolymerization (MT)
Drugs to Treat Lung Cancer
Pemetrexed
Treatment
NSCLC
Drugs to Treat Lung Cancer
Pemetrexed
Mechanism
Inhibiting dihydrofolate reductase (DHFR) DHFR inhibitor (DNA SYNTHESIS)
Drugs to Treat Lung Cancer
Pemetrexed
Dose limiting toxicity
Low blood cell counts, as measured by a Complete Blood Count. This is a dose-limiting toxicity.
Drugs to Treat Lung Cancer
Topotecan
Treatment
SCLC
Drugs to Treat Lung Cancer
Topotecan
Mechanism
DNA topo I complex stabilizer
Drugs to Treat Lung Cancer
Topotecan
Side effects
Myelosuppression and GI toxicity
Hyperbilirubinemia
Drugs to Treat Lung Cancer
Vincristine
Treatment
SCLC
Drugs to Treat Lung Cancer
Vincristine
Mechanism
MT inhibitor, tubules disintegrate into spiral aggregates/ protofilaments
Drugs to Treat Lung Cancer
Vincristine
Side effects
Peripheral neuropathy, hyponatremia, constipation, and hair loss.
First symptoms of peripheral neuropathy is foot drop:
Drugs to Treat Lung Cancer
Vinorelbine
Treatment
NSCLC
Drugs to Treat Lung Cancer
Vinorelbine
Mechanism
MT inhibitor, tubules disintegrate into spiral aggregates/ protofilaments
Drugs to Treat Lung Cancer
Vinorelbine
Side effects
Neutropenia, (peripheral neuropathy)