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1 year, 8 months ago via allergy-guru.com

What's the difference between Allegra and Allegra-D?

What's the main chemical and effective difference between Allegra and Allegra-D? How are they different or better than each other?
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annelisle | 1 year, 7 months ago
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Allegra-D has the main ingredients Fexofenadine + pesudoephedrine. The difference between Allegra and Allegra D is that Allegra D has antihistamine together with the nasal decongestant pseudoephedrine. It does not cause drowsiness and if ever it does the effect is less. It works by blocking the release of histamine from the cell at the histamine receptor site and relieve the symptoms of seasonal allergies and hay fever like itchy, runny nose, sneezing, and watery eyes. The effect begins in an hour and lasts up to 12 hours.
The decongestant does not have any effect in the rash but only in the nose and sinuses. It is the antihistamine that alleviates the rashes which is the same dose in both Allegra and Allegra D.

Allegra D should not be used for those who are hypertensive, diabetic, with heart problems, prostate problems, or hyperthyroidism since it contains pseudoephedrine, a decongestant.
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iklilian | 1 year, 7 months ago
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This is a question that most users of Allegra and Allegra D ask. The drugs might seem the same, but they are actually different. The active ingredient in Allegra and Allegra- D is Fexofenadine HCL. But Allegra- d contains another powerful ingredient known as Pseudoephedrine HCl.

This Pseudoephedrine HCl is a sympathomimetic amine that is very active orally. It exercises a decongestant effect on a person’s nasal mucosa, thereby causing the blood vessels in the nose to be narrower. This action is what results in the clearing of the nasal passage and relieving congestion.

Allegra does not have Pseudoephedrine HCl and therefore would not be so effective if used to relief nasal congestion, but Allegra- D would do the job, just fine. I think this two in one function of Allegra-D is what made it a favorite prescription by doctors.
http://www.pillspy.com/images/allegra-d_box.gif
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jen2684 | 1 year, 8 months ago
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Allegra-D contains the decongestant, pseudoephedrine, whereas Allegra does not.

Regular Allegra is good for your runny nose, itchy and watery eyes.....the Allegra D will help when you become Stuffy. It all depends on your symptoms and how bad one's individual allergies are. Best advice, talk to your doctor.
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