upper respiratory diseases Flashcards
What are the upper respiratory diseases?
Common cold, Acute rhinitis, Sinusitis, Acute pharyngitis
What is the common cold caused by?
Rhinovirus, contracted by touching contaminated surfaces
When does the incubation period occur?
1-4 days before the onset of symptoms
How long is the period of infection?
21 days, 7 days to start, 7 days during, and 7 days for it to go away
What is acute rhinitis?
Acute inflammation of the mucus membranes, accompanies the common cold
What is sinusitis?
Inflammation of the sinuses
What is acute pharyngitis?
Inflammation of the throat
What are sinusitis and acute pharyngitis typically caused by?
Viral infections
What are antihistamines?
H1 or H1 antagonists, block nasal secretions, they compete with histamine for receptor sites preventing the histamine response
What are the two types of histamine receptors?
H1 - when stimulated, the extravascular smooth muscle in the nasal cavity are constricted; H2 - when stimulated there is an increase of gastric secretions
What are the antihistamine generations and their side effects?
1st gen - drowsiness (significant), dry mouth, and other anticholinergic effects (med example: Benadryl); 2nd gen - nonsedating antihistamines, have fewer anticholinergic effects (med example: Allegra (fexofenadine), and loratadine (Claritin))
What antihistamine generation is Diphenhydramine (Benadryl)?
1st generation
What are the indications for Diphenhydramine (Benadryl)?
Treat allergic rhinitis and itching, prevent motion sickness, sleep aid, antitussive
What are contraindications for Diphenhydramine (Benadryl)?
Acute asthma attack, severe liver disease, lower respiratory disease, Neonate, MAOIs
What are drug interactions of Diphenhydramine (Benadryl)?
Increased CNS depression with alcohol, narcotics, hypnotics, barbiturates, MAOIs
What are side effects of Diphenhydramine (Benadryl)?
Drowsiness, fatigue, dizziness, urinary retention, constipation, dry mouth, decreased secretions
What is the paradoxical effect that can occur in children?
Excitation
What are the adverse effects of Diphenhydramine (Benadryl)?
Life threatening agranulocytosis, thrombocytopenia, and hemolytic anemia
How do antitussives work?
Act directly on the medullary cough center of the brain to inhibit the cough reflex
What are the indications for antitussives?
Control nonproductive cough
How are antitussives metabolized and excreted?
Metabolized in the liver, excreted in the urine
What are contraindications of antitussives?
Patients who need to cough to maintain airways, head injury and impaired CNS
In what patients should we take caution with when giving antitussives?
Hypersensitivity or history of narcotic addiction
What are the adverse effects of antitussives?
Drying effect on the mucous membranes, CNS effects (drowsiness and sedation), GI upset
What is the prescriptive antitussive?
Codeine
If someone with a narcotic addiction needs an antitussive what should we give them?
The over the counter version
What is Dextromethorphan Hydrobromide?
Over the counter antitussive
What pregnancy category is Dextromethorphan Hydrobromide?
Pregnancy category C
How is Dextromethorphan Hydrobromide given?
PO
How does Dextromethorphan Hydrobromide work?
Temporarily suppresses a non productive cough, and reduces viscosity of tenacious secretions