Co-administration of 180 mg fexofenadine hydrochloride tablet with a high fat meal decreased the mean area under the curve (AUC) and (Cmax) of fexofenadine by 21 and 20% respectively. Administration of a 30 mg dose to pediatric subjects 2 to 11 years of age produced exposures comparable to those seen with a dose of 60 mg administered to adults. In one 2-week, multicenter, randomized, double-blind clinical trial in subjects 12 to 65 years of age with seasonal allergic rhinitis (n=863), fexofenadine hydrochloride 180 mg once daily significantly reduced total symptom scores (the sum of the individual scores for sneezing, Buy Allegra D itchy nose/palate/throat, itchy/watery/red eyes) compared to placebo. There were no significant differences in the effect of fexofenadine hydrochloride across subgroups of subjects defined by gender, age, and race. The mechanism of these interactions has been evaluated in in vitro, in situ, and in vivo animal models. The administration of the 60 mg capsule contents mixed with applesauce did not have a significant effect on the pharmacokinetics of fexofenadine in adults.
Two 2-week multicenter, randomized, placebo-controlled, double-blind trials in 877 pediatric subjects 6 to 11 years of age with seasonal allergic rhinitis were conducted at doses of 15, 30, and 60 mg twice daily. Fexofenadine hydrochloride, the major active metabolite of terfenadine, is an antihistamine with selective peripheral H1-receptor antagonist activity. Improvement was demonstrated within 1 day of treatment with fexofenadine hydrochloride 180 mg and was maintained over the entire 4- week treatment period. It is freely soluble in methanol and ethanol, slightly soluble in chloroform and water, and insoluble in hexane. The pharmacokinetics of fexofenadine hydrochloride in subjects with seasonal Allegra D XR rhinitis and subjects with chronic urticaria were similar to those in healthy subjects. In 1 clinical trial conducted with ALLEGRA 60 mg capsules, and in 1 clinical trial conducted with ALLEGRA-D 12 Hour extended release tablets, onset of action was seen within 1 to 3 hours. Fruit juices such as grapefruit, orange and apple may reduce the bioavailability and exposure of fexofenadine Allegra D XR . Onset Purchase Allegra D action for reduction in total symptom scores, excluding nasal congestion, was observed at 60 minutes compared to Allegra D XR following a single 60 mg fexofenadine hydrochloride dose administered to subjects with seasonal allergic rhinitis who were exposed to ragweed pollen in an environmental exposure unit. ALLEGRA is formulated as a tablet for oral administration. Allegra D ER Information tablet formulations are bioequivalent to the capsule when administered at equal doses. Following single dose oral administrations of either the 60 and 180 mg tablet to healthy adult male subjects, mean Cmax were 142 and 494 ng/mL, respectively. This observed increase in the bioavailability of fexofenadine may be due to transport-related effects, such as p-glycoprotein.