Fexofenadine hydrochloride is the active ingredient in Allegra tablets and Allegra orally disintegrating tablets, according to RxList. It is also the active ingredient in Allegra oral suspension. Fexofenadine hydrochloride is an antihistamine that relieves the symptoms of allergic reactions, explains WebMD.Continue Reading
Allegra is a crystalline powder that is white to off-white in color, according to RxList. It easily dissolves in ethanol and methanol, slightly dissolves in water and chloroform, and does not dissolve in hexane. The tablet is made for oral consumption and is available in 30, 60 or 180 milligrams of fexofenadine hydrochloride, depending on the dosage.
Allegra oral disintegrating tablets contain 30 milligrams of fexofenadine hydrochloride and disintegrate in the mouth after administration, explains RxList. Allegra oral suspension is a white, uniform liquid that contains 6 milligrams of fexofenadine hydrochloride per milliliter.
Doctors prescribe fexofenadine hydrochloride medications to treat common allergy symptoms, including itching, runny nose and watery eyes, reports WebMD. The drug begins to have an effect after about one hour, and peaks in two to three hours, according to Drugs.com.
Dosages of fexofenadine hydrochloride depend on a person's medical condition, age and response to treatment, explains WebMD. Patients should take oral tablets with water. Fruit juices may reduce the body's ability to absorb fexofenadine hydrochloride. Patients should not take antacids that contain magnesium and aluminum within two hours of taking fexofenadine hydrochloride because these medications may decrease absorption of fexofenadine.Learn more about Medications & Vitamins