Aclidinium bromide, a novel long-acting muscarinic M3 antagonist for the treatment of COPD

Curr Opin Investig Drugs. 2009 May;10(5):482-90.


Aclidinium bromide is a novel, inhaled, long-acting antimuscarinic agent being developed by Almirall Prodesfarma SA and Forest Laboratories Inc as a once-daily treatment for COPD. In preclinical studies, aclidinium bromide demonstrated a comparable profile to tiotropium bromide, with a slightly quicker onset of action but shorter duration of action. Clinical trials have demonstrated an unquestionably interesting pharmacological profile characterized by a faster rate of onset of the smooth muscle relaxing activity than tiotropium bromide and a rapid plasma hydrolysis in human plasma to inactive metabolites that may account for its favorable cardiovascular safety profile. However, the disappointing efficacy results of the recent phase III trials have cast doubt on the real advantage of introducing this drug on the market. Discussions with the FDA concluded that more trials are needed to assess selected dosing regimens, including higher and/or more frequent doses. At the time of publication, further phase III trials with aclidinium bromide were ongoing, and the developing companies were also extending development to combinations of aclidinium bromide with formoterol or an undisclosed inhaled corticosteroid.

Publication types

  • Review

MeSH terms

  • Animals
  • Bronchodilator Agents / administration & dosage
  • Bronchodilator Agents / adverse effects
  • Bronchodilator Agents / toxicity
  • Clinical Trials as Topic / trends
  • Delayed-Action Preparations / administration & dosage
  • Delayed-Action Preparations / adverse effects
  • Delayed-Action Preparations / toxicity
  • Drug Evaluation, Preclinical / trends
  • Drugs, Investigational / administration & dosage*
  • Drugs, Investigational / adverse effects
  • Drugs, Investigational / toxicity
  • Humans
  • Muscarinic Antagonists / administration & dosage*
  • Muscarinic Antagonists / adverse effects
  • Muscarinic Antagonists / toxicity
  • Pulmonary Disease, Chronic Obstructive / drug therapy*
  • Pulmonary Disease, Chronic Obstructive / metabolism
  • Receptor, Muscarinic M3 / antagonists & inhibitors*
  • Receptor, Muscarinic M3 / metabolism
  • Tropanes / administration & dosage*
  • Tropanes / chemistry*


  • Bronchodilator Agents
  • Delayed-Action Preparations
  • Drugs, Investigational
  • Muscarinic Antagonists
  • Receptor, Muscarinic M3
  • Tropanes
  • aclidinium bromide