WebMD -- March 23, 2011 -- Once-daily Spiriva (tiotropium) may be more effective at reducing risk for exacerbations among people with moderate to severe chronic obstructive pulmonary disease (COPD) than Serevent (salmeterol), a new study shows.
WebMD -- March 23, 2011 -- Once-daily Spiriva (tiotropium) may be more effective at reducing risk for exacerbations among people with moderate to severe chronic obstructive pulmonary disease (COPD) than Serevent (salmeterol), a new study shows.
