Respiratory muscle training, often utilizing simple hand-held portable resistive or threshold training devices, appears to have marginal effects on vital capacity and maximal static mouth inspiratory and expiratory pressures (MIP and MEP, respectively), although data is inconclusive. Pharmacologic interventions to improve respiratory muscle strength have received little attention in the SCI population. Studies involving oral beta-2 adrenergic agonists, which have been shown to elicit anabolic effects on skeletal muscle in young men and an increase in muscle strength among patients with facioscapulohumeral muscular dystrophy, have also demonstrated salutary effects in persons with SCI. There are many foreseeable advantages of a pharmacologic approach to improve respiratory muscle strength in persons with SCI. For instance, RMT can be physically demanding and time consuming, compliance can be an issue, and sustainable improvements have not been realized. The intent in the present proposal is to enroll a targeted cohort of 24 comparatively weaker subjects with tetraplegia and high paraplegia in a randomized, double-blind, placebo-controlled, parallel group trial to assess the effects of an oral beta-2 agonist upon respiratory muscle strength and cough effectiveness.