Umeclidinium bromide is an anticholinergic drug approved for use in combination with vilanterol (as umeclidinium bromide/vilanterol) for the treatment of chronic obstructive pulmonary disease (COPD).meclidinium bromide is an anticholinergic drug approved for use in combination with vilanterol (as umeclidinium bromide/vilanterol) for the treatment of chronic obstructive pulmonary disease (COPD).