COPD vs. Asthma: What Is the Difference?

COPD or chronic obstructive pulmonary disease and asthma are both chronic lung diseases. The most common cause of COPD is smoking, while asthma is an inflammatory response by the body. Symptoms of COPD worsen over time, but they can be treated and managed with drugs and other therapies. There is no cure for COPD. Some forms of asthma can be reversible with medication, drug therapies, and lifestyle changes. Both conditions can be life threatening.

COPD vs. asthma symptoms and signs

The signs and symptoms are the same for COPD and emphysema because emphysema is a type of late-stage COPD. These symptoms mainly affect the respiratory tract and include:

People often have other types of COPD, for example, asthma, chronic bronchitis, and bronchiectasis, before they develop emphysema. Each of these types have their own characteristic symptoms and severity of symptoms, but because COPD generally progresses and worsens over time, these symptoms worsen as well.

There is quite a bit of overlap of symptoms between all of the types of COPD. Doctors consider emphysema the "end-stage" of COPD, where respiratory symptoms and shortness of breath can be so severe you require constant oxygen, and it becomes debilitating.


COPD Lung Symptoms, Diagnosis, Treatment See Slideshow

COPD vs. asthma differences between symptoms

There are no differences between COPD and emphysema if you consider emphysema to be a type of end-stage of COPD. However, emphysema (or end-stage, type 3-4 COPD) has permanent destructive tissue changes seen on biopsy samples that are different from the earlier stages or types of COPD.

COPD vs. emphysema causes

If you consider COPD and emphysema as the same disease, there are no differences in the causes, for example, smoking, secondhand smoke, immune-mediated tissue changes, inhaling toxic substances, and/or alpha-1-antitrypsin deficiency. However, by far, the number one cause of COPD (and emphysema) is cigarette smoking.

What things worsen symptoms?

Things that make symptoms worse for all types of COPD, and especially emphysema are the same. COPD and emphysema are slowly progressive diseases that worsen over time (sometimes even with treatment).


COPD (chronic obstructive pulmonary disease) is the same as adult-onset asthma. See Answer

What are the stages of COPD?

There are two common staging systems for COPD, the GOLD system, and the BODE index.

The GOLD system measures your breathing air volume (FEV1) as compared to normal predicted breathing and designates your breathing into one of four COPD stages are:

  • Stage 1 or Mild (80% of normal)
  • Stage 2 or Moderate (50-80%)
  • Stage 3 or Severe (30-50%) emphysema
  • Stage 4 or Very severe, (less than 30%), end-stage, severe or end-stage emphysema

The BODE index attempts to place your COPD into one of four survival stages based on body mass, airflow obstruction, shortness of breath, and exercise capacity by a point system.

Talk to your doctor to discuss these staging systems and how they may relate tour individual problem and treatment.

What are the stages of emphysema?

Using the GOLD system (as used in COPD), doctors classify COPD and emphysema as stages 1-4 with 4 being the worst or most severe stage.

How do doctors diagnose COPD vs. emphysema?

Doctors use the same tests to diagnose COPD and/or emphysema. The tests may include:

  • Your history, family history, and physical exam
  • Arterial blood gas
  • Hematocrit
  • Serum bicarbonate
  • Alpha-1-antitrypsin level
  • Sputum exam
  • Chest x-ray
  • Chest CT
  • Pulmonary function tests (FEV1) and staging

Subscribe to MedicineNet's Allergy and Asthma Newsletter

By clicking "Submit," I agree to the MedicineNet Terms and Conditions and Privacy Policy. I also agree to receive emails from MedicineNet and I understand that I may opt out of MedicineNet subscriptions at any time.

COPD vs. emphysema treatments

The treatments for both COPD and emphysema are the same:

  • Stop smoking
  • Bronchodilators (short and long acting)
  • Long acting beta agonists
  • Long acting muscarinic agonists
  • Phosphodiesterase inhibitors
  • Anti-inflammatory drugs
  • Antibiotics (as needed)
  • Mucolytic agents
  • Oxygen therapy

Other medications or treatments may be helpful or needed in special circumstances, for example, alpha-1-antitrypsin replacement, or mechanical assisted breathing for a short time).

Your doctor may recommend surgery to reduce your symptoms and/or to help restore some of your lung function. Surgical procedures your doctor may discuss with you include removing the nonfunctional air sacs in your lungs (large bullae) to decompress lung tissue, lung volume reduction to decrease lung hyperinflation, endobronchial valve placement, and lung transplant.

You and your medical team (primary care, pulmonologist, and surgeon) will discuss what treatments would be best for your health care.

Will lifestyle changes slow the progression of COPD or emphysema?

It is possible to slow the progression of COPD/emphysema by quitting smoking, medical and/or other surgical treatments, and physical therapy. However, even with aggressive and appropriate treatment often COPD will progress.

Is there a cure for COPD or emphysema?

Symptoms and complications can be treated and managed, however, here is no cure for COPD/emphysema.

What is the life expectancy for COPD vs. emphysema? Are they fatal?

The life expectancy can be estimated for COPD/emphysema by the BODE index previously mentioned. However, it is not possible to determine accurate life expectancy for these patients because of so many variables that may change. Nonetheless, types 3- 4 COPD/emphysema puts you at risk for many serious or fatal complications like pneumonia or heart failure. For this reason, some doctors consider types 3-4 COPD/emphysema to be a life threatening disease.

Health Solutions From Our Sponsors


Mosenifar, Z. "Chronic Obstructive Pulmonary Disease (COPD)." Medscape. Updated: May 02, 2017.

Boka, K. "Emphysema." Medscape. Updated: Aug 31, 2016.

CDC. "Chronic Obstructive Pulmonary Disease (COPD)." Updated: Sep 16, 2016.

NIH; National Heart, Lung, and Blood Institute. "COPD National Action Plan." Updated: May 15, 2017.

NIH; National Heart, Lung, and Blood Institute. "What is COPD?" Updated: Apr 28, 2017.

U.S. Department of Health and Human Services. "COPD (Chronic Obstructive Pulmonary Disease)." Updated: Oct 31, 2014.

Victoria State Government. "Emphysema." Updated: Nov 2014.

Sharafkhaneh, A. et al. Emphysema. Proc Am Thorac Soc. 2008 May 1; 5(4): 475–477. doi: 10.1513/pats.200708-126ET

Boka, K. "Emphysema." Medscape. Updated: Aug 31. 2016.

Kleinschmidt, P. "Chronic Obstructive Pulmonary Disease (COPD) and Emphysema in Emergency Medicine." Medscape. Updated: Jun 08, 2017.