Lower Respiratory Tract Infections

Updated: November 25, 2022

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Background

Epidemiology

Anatomy

Pathophysiology

Etiology

Genetics

Prognostic Factors

Clinical History

Physical Examination

Age group

Associated comorbidity

Associated activity

Acuity of presentation

Differential Diagnoses

Laboratory Studies

Imaging Studies

Procedures

Histologic Findings

Staging

Treatment Paradigm

by Stage

by Modality

Chemotherapy

Radiation Therapy

Surgical Interventions

Hormone Therapy

Immunotherapy

Hyperthermia

Photodynamic Therapy

Stem Cell Transplant

Targeted Therapy

Palliative Care

Medication

 

formoterol

20

mg

inhaled by nebulizer twice a day
or
1 or 2 capsules inhaled every 12 hours (Do not exceed 4 capsules/day)



arformoterol

15

mcg

oral inhalation twice a day



indacaterol

1 capsule (75 mcg) is inhaled once a day



levalbuterol

Nebulization solution: 0.63 mg to 1.25mg oral inhalation every 1 hour for 2 to 3 doses or as needed
Metered-dose inhaler: 1 to 2 oral inhalations every 1 hour for 2 to 3 doses or as needed



ipratropium

Inhaler:

2

actuations

every 6 hrs


Do not exceed 12 actuations per day
Nebulizer: 2.5 mL every 6-8hours



roflumilast 

500

mcg

Tablet

Orally 

once a day

4

weeks



olodaterol/tiotropium 

Inhalation mouth spray:

Mouth spray

Inhalation

Each actuation=2.5mcg tiotropium(3.124mcg tiotropium bromide monohydrate) and 2.5mcg olodaterol(2.736mcg olodaterol hydrochloride
Chronic obstructive pulmonary disorder
Two inhalations orally every day at the same time



glycopyrrolate inhaled and formoterol 

Mouth spray

Orally inhaled

twice a day

Two inhalations (Formoterol 18mcg/ Glycopyrrolate inhaled 9 mcg for each inhalation)
Do not exceed two inhalations per day



amoxicillin 

Mild/moderate/severe:

875

mg

every 12 hrs or 500mg every 8hrs



clarithromycin 

Acute exacerbation:

500 mg oral tablet immediate release every 12 hours for 5 to 7 days
Note: Not recommended for with risk infection of Pseudomonas



aclidinium and formoterol 

One inhalation orally twice a day. Do not exceed one inhalation per day



salbutamol 

Aerosol Metered dose inhaler
1 to 2 inhalations in 2-3 doses every hour, then every 2 to 4 hours



ciprofloxacin 

In the case of mild/moderate infections: 500 mg orally every 12 hours or 400 mg intravenously every 12 hours for 7-14 days
In the case of severe/complicated infections: 750 mg orally every 12 hours or 400 mg intravenously every 8 hours for 7-14 days
Limitations for usage: Reserve the fluoroquinolones for patients who are voided of available treatment options for chronic bronchitis



azithromycin 

3 days of 500 mg orally every day OR Instead, take 500 mg orally in a single dosage on Day 1, then 250 mg orally every day from Days 2 to 5



aclidinium 

inhaling 400 mcg (1 puff) orally two times daily



revefenacin 

Using a mouthpiece on a nebulizer, inhale 175 mcg orally every day
Administer every day at the same time
Do not exceed 175mg daily once



Dose Adjustments

Renal impairment
Any level of impairment: No change in dose is necessary.
Patients with COPD with substantial renal impairment should be monitored for systemic antimuscarinic side effects.

Hepatic impairment
Mild-to-severe: Safety has not been determined; individuals with any degree of hepatic impairment are not recommended

tiotropium 

It is indicated in the maintenance of bronchospasm that is linked to COPD, helping in COPD exacerbations
Spiriva Handihaler- 2 inhalations from a capsule orally each day through the HandiHaler device
Spiriva Respimat- 2 actuation of 2.5 mcg each, inhaled orally daily



indacaterol, inhaled/glycopyrrolate inhaled 

Indicated for long-term maintenance of COPD
Inhale the contents orally through one capsule every 12 hours by a neo haler device



umeclidinium bromide/vilanterol inhaled 

Indicated for long-term maintenance of COPD that includes emphysema and chronic bronchitis
62.5 mcg/25mcg as one actuation inhaled orally each day
Do not exceed more than one inhalation each day



budesonide inhaled/formoterol/glycopyrrolate inhaled 

2 inhalations orally two times daily
Dosage Modifications
Renal impairment
Study not carried out
Hepatic impairment
Study not carried out
Dosing Considerations
Limitations of use: Not suggested for in acute bronchospasm



albuterol/ipratropium 

Aerosol: Administer 100 mcg/20 mcg (1 metered-dose inhaler actuation) every six hours
Do not exceed more than six actuations daily.
Nebulizer: Administer 3ml inhalation every 6 hours.
Do not exceed 3ml every 4 hours.



batefenterol 

(off-label):

By using a dry powder inhaler, The administration of batefenterol at a dose of 300 µg for a duration of 42 days
Note: The dosage of 300 µg of batefenterol could be considered as the most suitable for clinical trials (phase III)



carbocisteine 

Indicated as mucolytic agent:

Administer 750 mg to 2.25 g daily in three to four divided doses



clenbuterol 

Take a dose of 20 mcg orally two times a day
Daily dose should not be more than 60 mcg



rimiterol 

As metered-dose aerosol:
Inhaled dose of 250 to 500 mcg when required
Dose should not be more than 8 times in a day
Do not repeat dose in less than 1 hour



abediterol 

It assesses four separate inhaled abediterol dosages at 0.625 ug, 2.5 ug, 5 ug & 10 ug Comparing the results to a placebo, it was evident that all doses considerably improved bronchodilation Comparing the doses of 2.5, 5, and 10 ug to the active comparator, further improvements were observed



etophylline and theophylline 

115 mg of etophylline and 35 mg of theophylline is given once a day



almitrine 

It is used as a respiratory stimulant used in the therapy for acute respiratory failure such as COPD
The usual dose via oral administration given as a tablet is 50 -100 mg, which is divided into two doses per day
The usual dose via IV administration is 1-3 mg/kg per day, which is given in divided doses which is infused for over 2 hours



Dose Adjustments

Limited data is available

cefodizime 

Administer 1 to 2 g once or twice a day intramuscularly or intravenous infusion.
Maximum dose-4 g/day.

Renal impairment
CrCl 10 to 30ml/min-Administer 1 to 2 g every day.
CrCl<10ml/min- Administer 0.5 to 1 g every day.



acebrophylline 

Take a dose of 100 mg orally two times daily



albuterol/ipratropium 

Aerosol: 100mcg albuterol /20mcg ipratropium bromide (1 actuation of metered-dose inhaler) every 6 hours; should not exceed more than 6 actuations/day
Nebulizer solution: 3 mL is inhaled every 6hours; should not exceed more than 3 mL every 4hours



bromotheophylline 

Take one tablet/capsule after the breakfast with a glass of water. Dose can be repeated every six hours, should not exceed more than four capsules daily



glycopyrrolate 

solution

Inhalation

Using the nebulization system, inhale the contents of the vial two times a day
Capsules for inhalation
using an inhaler, inhale the capsule contents twice daily



bitolterol 

Administer 2 inhaled aerosols dose at an interval of minimum 1 to 3 minutes followed by a third inhalation



enprofylline 

Administer 150mg twice a day, can increase the dose to 300mg to 450mg twice a day based on the patient's tolerance.



flurithromycin 

375

mg

Tablets

Orally 

twice a day

2

weeks



Dose Adjustments

Off-label

pf-00610355 

280

mcg

Inhalation

once a day

Off-label



budesonide and formoterol (inhalation) 

160 mcg/9 mcg (2 divided doses of 80 mcg/4.5 mcg) every 12hr
should not exceed more than 320 mcg/9 mcg q12hr



Dose Adjustments

Dosing considerations:
Asthma: 80 mcg/4.5mcg should be given if response is inadequate after 1-2 weeks.
Chronic obstructive pulmonary disease (COPD): the only treatment dose is 160 mcg/4.5 mcg.

doxofylline 

It is used to treat obstructive lung illnesses like COPD and asthma
It is used to treat the symptoms of lung problems, such as wheezing, dyspnea, and tightness in the chest
The recommended usual dose per day is 400 mg two or three times with a maximum permissible limit is 1200 mg per day



Dose Adjustments

Limited data is available

sulfametopyrazine 

It is mostly recommended for respiratory tract infections, chronic bronchitis, and urinary tract infections
The usual recommended single dose per week only once is 2 g via oral administration



Dose Adjustments

Reduction in dosage is needed depending upon the condition

goldenseal 

Liquid Extract
Administer 0.3ml to 1.0 ml orally thrice a day;60% ethanol
Topical Mouthwash
Administer 6g dried herb with 150 ml water. Rinse thrice or twice a day
Rhizome/Dried root/Tea
Administer 0.5 to 1g orally thrice a day
Tincture
Administer 2 to 4 ml orally thrice a day;60% ethanol



azithromycin/ambroxol 

Indicated for Acute bacterial exacerbations of the COPD
500 mg orally four times a day for nearly three days
or Day-1: 500 mg orally one time Day-2 to Day-5: 250 mg orally every day



batefenterol (Investigational) 

Off-label:

By using a dry powder inhaler, the administration of batefenterol at a dose of 300 µg for a duration of 42 days
Note: The dosage of 300 µg of batefenterol could be considered as the most suitable for clinical trials (phase III)



 

amoxicillin 

Mild/moderate/severe :

45 mg/kg daily divided in doses for every 12hrs or 40 mg/kg per day in divided doses for every 8hrs
Community-acquired pneumonia (Off-label use)
<3 months: Safety and effectiveness have not been established
Age: ≥3 months
immediate release (IR):
Empirical treatment:
90 mg/kg/day orally, divided 2 times a day 10 days
maximum daily dose should not exceed 4,000 mg
Group A Streptococcus:
50-75 mg/kg/day orally, divided 2 times a day 10 days
maximum daily dose should not exceed 4,000 mg
H. influenza:
75-100 mg/kg/day orally, divided 3 times a day 10 days
maximum daily dose should not exceed 4,000 mg
S. pneumoniae:
90 mg/kg/day orally, divided 2 times a day 10 days or 45 mg/kg/day divided 2 times a day 10 days
maximum daily dose should not exceed 4,000 mg



carbocisteine 

Indicated as mucolytic agent:

Children 12 to under 15 years: Administer 100 to 750 mg thrice daily.
Children 6 to 11 years: Administer 100 to 250 mg thrice daily.
Children 2 to 5 years: Administer 100 mg twice or 62.5mg 125mg four times daily.



acebrophylline 

For <2 years old:
Take a dose of 2.5 ml orally two times daily
For 2 to 5 years old:
Take a dose of 2.5 ml orally three times daily
For >5 years old:
Take a dose of 5 ml orally two times daily



bitolterol 

for >12 years old:
Administer 2 inhaled aerosols dose at an interval of minimum 1 to 3 minutes followed by a third inhalation



doxofylline 

It is used to treat obstructive lung illnesses like COPD and asthma
It is used to treat the symptoms of lung problems, such as wheezing, dyspnea, and tightness in the chest
The recommended usual dose per day is 400 mg two or three times with a maximum permissible limit is 1200 mg per day



 

doxofylline 

It is used to treat obstructive lung illnesses like COPD and asthma
It is used to treat the symptoms of lung problems, such as wheezing, dyspnea, and tightness in the chest
Lower the dosage compared to the adult dosage to 200 mg twice a day



Dose Adjustments

Limited data is available

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References

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Lower Respiratory Tract Infections

Updated : November 25, 2022

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