Respiratory Drugs Flashcards
Respiratory drugs are commonly used to?
Control the symptoms of respiratory tract disease by restoring normal function
Normal respiratory tract anatomy’s & physiology includes?
- Nasal Cavity
- Pharynx
- Larynx
- Trachea
- Bronchi
- Bronchioles
- Alveoli
Functions of the respiratory tract?
- Oxygen & Carbon Dioxide Exchange
- Body Temperature Regulation
- Voice Production
Maintenance of the respiratory tract?
The environment within the respiratory tract must be highly humid & free of foreign objects.
1. Nasal Hairs - Filters out large particles
2. Nasal Turbinates (Concha) - Traps small particles & warms/humidifies the outside air
3. Mucociliary Clearance - Traps small particles in mucus & than are excreted by a wavelike action of the cilia
4. Coughing & Sneezing - Expel foreign debris forcefully
5. Laryngospasm & Bronchoconstriction - Prevent introduction of foreign debris into the respiratory tract
Antitussive drugs are?
Drugs that block the cough reflex
What are the two types of antitussives used in vet med?
- Centrally Acting Antitussives
- Locally Acting Antitussives
Centrally acting antitussives work by?
Suppressing the cough center in the central nervous system
Locally Acting Antitussives work by?
Preventing irritation to the respiratory tract
*Cough Drops
Opioid Analgesic Antitussive Drugs are what type of antitussive?
Centrally acting cough suppressants
Common opioid analgesic antitussives drugs used in vet med?
- Butorphanol
- Hydrocodone
- Dextromethorphan
- Codeine
Butorphanol is what type of antitissuvie?
Opioid analgesic antitussive
Centrally acting cough suppressant
Is Butorphanol a controlled drug?
yes
Butorphanol effects?
Centrally acting cough suppressant
Causes little sedation at antitussive dose
Hydrocodone is what type of drug?
Opioid Analgesic Antitussive Drug
Hydrocodone effects?
Centrally acting cough suppressant
May cause sedation
May cause constipation
Provides analgesia
*Controlled drug
Dextromethorphan
Common ingredient inhuman nonprescription cold & flu medication
Codeine
Found in many human cough suppressants
May cause duration
Controlled drug
Mucolytic drugs are?
Drugs that reduce the viscosity of mucus in the respiratory tract
*Viscosity of mucus may increase during infection &/or inflammation
Common Mucolytic drugs used in vet med?
Acetylcysteine
*Trade Name: Mucomust
Acetylcysteine administration?
By using a nebulizer
Acetylcysteine is the drug of choice to treat?
Acetaminophen toxicity
Expectorant drugs are?
Drugs that increase the fluid consistency of mucus in the respiratory tract. Acts by stimulating the parasympathetic nervous system system receptors to increase respiratory fluid secretions
What are the two forms for expectorant drugs?
- Oral Medications
- Inhaled Vapors
What are two commonly used expectorant drugs in vet med?
- Guaifenesin or Saline Solutions
- Inhaled Vapors
Bronchodilator drugs are used to?
Relieve bronchoconstriction
Bronchonstriction can be caused by?
- Parasympathetic nervous system stimulation
- Organophosphate toxicity
- Histamine Release (Asthma) - Prevention of Sympathetic nervous system stimulation by drugs that block its receptors
- Think when your running you need your lungs to expand fully but when your at rest they can constrict (relax)
What are examples of bronchodilator drugs?
- Beta-Adrenergic Agonists
- Methylxanthines
Beta-Adrenergic Agonist work by?
stimulating sympathetic nervous system system receptors (∫B-2) involved in bronchodilation & stabilization of mast cells
Methylaxanthines work by?
Causing bronchodilation by interfering with smooth muscle cell metabolism
Methylxanthines may cause?
Central Nervous System Stimulation & GI upset
Methylxanthines have a narrow or wide therapeutic range?
Narrow
Methylxanthines is metabolized in the?
Liver
Glucocorticoids clinical use as a respiratory drug?
- Parenteral formulations recommended for short term use during acute respiratory problems (Allergic reactions/Asthma).
- Decreased inflammation & edema
- Inhaled recommended for long term control
Antihistamines clinical use as a respiratory drug?
Block histamine receptors in smooth muscle of bronchioles to prevent bronchoconstriction
Diuretics clinical use as a respiratory drug?
- Removal of accumulated fluid from the lungs
- Nebulize & coupage if possible to aid in the removal of respiratory secretions