Chronic Obstructive Pulmonary Disease (COPD)

Causes

• Cigarette smoking: This is the leading cause of COPD. The longer and more heavily a person smokes, the greater the risk of developing COPD. Other irritants that can contribute to COPD include:
• Exposure to secondhand smoke.
• Air pollution: Long-term exposure to high levels of air pollution, both indoors and outdoors.
• Occupational dusts and fumes: Inhaling dusts and fumes from certain jobs (e.g., mining, construction, chemical manufacturing).
• Genetic factors: In rare cases, a genetic condition called alpha-1 antitrypsin deficiency can cause COPD, even in non-smokers.

Symptoms

• Shortness of breath (dyspnea): This may initially occur only during exertion but can progress to breathlessness even at rest.
• Chronic cough: A persistent cough that may produce a lot of mucus (sputum).
• Wheezing: A whistling or squeaky sound when breathing.
• Chest tightness.
• Frequent respiratory infections.
• Fatigue.
• Unintentional weight loss (in later stages).
• Swelling in the ankles, feet, or legs (in later stages due to heart problems).
• Symptoms may vary in severity and can have flare-ups (exacerbations) where symptoms suddenly worsen.

Diagnosis

• Medical history: Your doctor will ask about your smoking history, exposure to irritants, and symptoms.
• Physical exam: Listening to your lungs with a stethoscope.
• Spirometry: A lung function test that measures how much air you can inhale and exhale and how quickly you can exhale. This is the primary test used to diagnose and assess the severity of COPD.
• Other tests: Depending on the situation, your doctor may also order chest X-rays or CT scans, arterial blood gas analysis (to measure oxygen and carbon dioxide levels in your blood), and alpha-1 antitrypsin deficiency testing.

Treatment

There is no cure for COPD, but treatments can help manage symptoms, slow the progression of the disease, reduce the frequency and severity of exacerbations, and improve quality of life. Treatment options include:

• Lifestyle changes:
  • Quitting smoking: This is the most important step to slow the progression of COPD.
  • Avoiding irritants: Minimize exposure to secondhand smoke, air pollution, and occupational dusts and fumes.
  • Pulmonary rehabilitation: A program that includes exercise training, disease management education, and support to help improve breathing and daily functioning.
  • Healthy diet: Maintaining a healthy weight and eating nutritious foods.
  • Vaccinations: Getting annual flu shots and pneumococcal vaccinations to help prevent respiratory infections.
• Medications:
  • Bronchodilators: Medications that help to relax the muscles around the airways, making it easier to breathe. These are often inhaled and come in short-acting and long-acting forms.
  • Inhaled corticosteroids: Help to reduce inflammation in the airways and are often used in combination with long-acting bronchodilators.
  • Combination inhalers: Contain both a long-acting bronchodilator and an inhaled corticosteroid.
  • Oral corticosteroids: May be prescribed for short periods during COPD exacerbations.
  • Phosphodiesterase-4 (PDE4) inhibitors: Reduce airway inflammation and may be used in some people with severe COPD and frequent exacerbations.
  • Theophylline: A bronchodilator that is taken orally and may be used in some cases.
  • Antibiotics: May be prescribed to treat bacterial respiratory infections that can trigger COPD exacerbations.
  • Oxygen therapy: Supplemental oxygen may be needed if blood oxygen levels are low. Oxygen can be delivered through nasal prongs or a mask.
  • Surgery: In some severe cases, surgical options such as lung volume reduction surgery or lung transplantation may be considered.

Prevention

• Never start smoking.
• Quit smoking if you currently smoke.
• Avoid secondhand smoke.
• Minimize exposure to air pollution and occupational irritants.

Living With COPD

COPD is progressive, but the pace is not fixed, and the difference between a slow decline and a fast one comes down to a handful of decisions that are within reach at every stage of the disease.

Quitting still matters, at any stage

Stopping smoking is the only intervention that slows the loss of lung function, and it does so whether the disease is mild or advanced. Willpower alone succeeds in a small minority of attempts; combining varenicline or nicotine replacement with behavioral support roughly triples the odds. The nicotine dependence page covers what treatment looks like.

Inhalers by purpose, not by name

A long-acting bronchodilator such as tiotropium or umeclidinium is the foundation of daily treatment, often combined with a long-acting beta-agonist such as formoterol. An inhaled steroid such as budesonide is added only for people with frequent flare-ups or a high blood eosinophil count, because in others it raises pneumonia risk without benefit. Albuterol is for rescue. Technique matters as much as the drug: most people use their inhaler incorrectly, and a check at each visit is worth more than a new prescription.

Flare-ups need a plan before they happen

An exacerbation, with more breathlessness, more sputum, or a change in its color, is treated early with a five-day course of prednisone and, when sputum has turned purulent, an antibiotic such as azithromycin. Each severe flare-up accelerates the decline in lung function and raises the risk of the next, so a written action plan with medication at home to start on day one prevents hospital admissions.

Pulmonary rehabilitation is the most underused treatment

After bronchodilators, a supervised exercise and education program is the single most effective treatment for breathlessness and quality of life, and it reduces readmission after a flare-up. Referral rates are low, largely because patients assume they are too breathless to exercise; the program exists precisely for people who are.

Vaccines, heat, and oxygen

Influenza, COVID-19, and pneumococcal vaccination prevent the infections that trigger most severe exacerbations, and the RSV vaccine is now recommended for adults 75 and older and for younger adults with COPD. St. Petersburg humidity makes air feel heavier to breathe, and the managing COPD in humid St. Pete guide covers coping with it. Long-term home oxygen is prescribed when resting oxygen saturation falls to 88 percent or below, and used for 15 or more hours a day it lengthens life. Our pulmonary team coordinates rehabilitation and oxygen assessment. The NHLBI and the American Lung Association publish patient guidance on every stage.

If you have had a flare-up in the past year and do not have a written action plan, or have never been offered pulmonary rehabilitation, schedule a visit.