About Allegra.

WARNINGS

Sympathomimetic amines should be used judiciously and sparingly in patients with hypertension, diabetes mellitus, ischemic heart disease, increased intraocular pressure, hyperthyroidism, renal impairment, or prostatic hypertrophy (see CONTRAINDICATIONS). Sympathomimetic amines may produce central nervous system stimulation with convulsions or cardiovascular collapse with accompanying hypotension.

PRECAUTIONS

Due to its pseudoephedrine component, ALLEGRA-D should be used with caution in patients with hypertension, diabetes mellitus, ischemic heart disease, increased intraocular pressure, hyperthyroidism, renal impairment, or prostatic hypertrophy (see WARNINGS and CONTRAINDICATIONS). Patients with decreased renal function should be given a lower initial dose (one tablet per day) because they have reduced elimination of fexofenadine and pseudoephedrine .

Generic Allegra is manufactured by a few companies and sold as Fexofenadine Hydrochloride tablets. They are available in the following strengths.

Fexofenadine Hydrochloride tablets 30 mg.
Fexofenadine Hydrochloride tablets 60 mg
Fexofenadine Hydrochloride tablets 180 mg.

At this time, generic Allegra oral suspension (liquid) and generic Allegra ODT (orally disintegrating tablets) are not available.

When you come in contact with something you’re allergic to, a chain reaction begins inside your body. During this chain reaction, specialized cells release powerful chemicals. Some of these chemicals can trigger swelling of the nasal passages leading to nasal congestion (a “stuffy nose”). Other chemicals, such as histamine, can cause sneezing, itching, and irritation.

Allegra is classified as an antihistamine. Allegra blocks the effects of histamine (hence its classification as an antihistamine). This can relieve allergy symptoms. However, since histamine is not the cause of nasal congestion, Allegra will not help open nasal passages.