A32 NEW ASTHMA THERAPIES: CLINICAL STUDIES: Tiotropium For Asthma Treatment: A Systematic Review And Meta-Analysis A32 NEW ASTHMA THERAPIES: CLINICAL STUDIES: Tiotropium For Asthma Treatment: A Systematic Review And Meta-Analysis Full Text Background A Cochrane review published in 2004 by Westby et al. stated that there wasn't justification for routinely introducing anticholinergics as part of add-on treatment for patients whose asthma is not well controlled on standard therapies. Since 2010, several large randomized controlled