Pulmonary dysfunction in 'freebase' cocaine users.

Of 19 consecutive smokers of cocaine, "freebase" cocaine users, admitted to a chemical dependence program, 12 (63%) had respiratory symptoms and ten (58%) noted dyspnea. Abnormalities of carbon monoxide diffusing capacity were also seen in ten of the subjects, although responses to steady-state exercise testing were normal in subjects undergoing exercise… (More)