CHESTER, N.J., June 14 /PRNewswire-FirstCall/ -- Adams Respiratory Therapeutics, Inc. (Nasdaq: ARXT - News) today announced that Mucinex® (600 mg guaifenesin extended-release bi-layer tablets) is the No. 1 recommended adult expectorant brand, as determined in the Pharmacy Times 2006 Over-the-Counter (OTC) Survey of Pharmacists Recommendations.