An open Label, Balanced, Randomized, Two-treatment, Two-period, Two-sequence, Single Dose, Crossover, Oral Bioequivalence Study of Fexofenadine Hydrochloride Orally Disintegrating Tablets 30 mg of Dr. Reddy's Laboratories Limited, India Comparing With That of Allegra ® (Containing Fexofenadine Hydrochloride) Orally Disintegrating Tablets 30 mg of Sanofi - Aventis U.S. LLC, Bridgewater, NJ 08807 in Healthy, Adult, Human Subjects Under Fasting Conditions.