Closely aligned with Aventis Pharma are Aventis Pasteur, world leader in vaccines based in Lyon, France, and Aventis Behring, world leader in therapeutic vaccines with corporate headquarters in King of Prussia, Pennsylvania, USA. In placebo-controlled chronic idiopathic urticaria clinical trials, 726 commande en ligne fexofenadine subjects 12 years of age and older received Fexofenadine hydrochloride tablets at doses of 20 to 240 mg twice daily. Share tips and experiences Food AllergiesHay Fever See All Yahoo Groups Tip of the DayProvided by: RealAgeAug 5, 2009Remember the potato chip slogan Betcha can eat just one There some scientific truth to it. These studies indicate that ketoconazole or erythromycin co-administration enhances fexofenadine gastrointestinal absorption. In these studies, there was no additional reduction in total symptom scores with higher doses of fexofenadine hydrochloride up to 240 mg twice daily. In addition to providing financial measurements based on GAAP, Sepracor is providing additional financial metrics that are not prepared in accordance with GAAP non-GAAP.