<prompt> Mucociliary is increased in cystic fibrosis byMannitolAmilorideAcetazolamideNone  <response>: Amiloride, a sodium channel blocker, has been shown to improve pulmonary mucociliary clearance in patients with cystic fibrosis. For the drug study measurements were also made on two consecutive days, after administration of nasally nebulised amiloride or placebo saline in a double blind manner. Ref Robbins 9e pg 178 