The form of vitamin B3 called nicotinamide riboside helps the body produce energy and repair cells, and is used as a dietary ...

Common symptoms of chronic obstructive pulmonary disease, or COPD, include shortness of breath, a frequent cough or cough that produces a lot of mucus, wheezing, and tightness in the chest. Excess ...

Roflumilast (brand name Daliresp) is a prescription medicine used in adults with severe COPD to decrease the number of exacerbations. It is in a class of medications called phosphodiesterase ...

There is no need to do any special preparation for this test. However, if you are on oxygen therapy, oxygen values must be constant for 20 minutes before the test. If you are taking medication to make ...