Allegra-D 24 Hour Allergy & Congestion is a medicine used in the treatment of nasal congestion. It has several active ingredients including fexofenadine and pseudoephedrine. Fexofenadine works as an antihistamine, preventing histamine from causing the allergic response (which results in nasal congestion). Pseudoephedrine complements fexofenadine by working as a nasal decongestant shrinking blood vessels in the nasal passage.
Allegra-D 24 Hour Allergy & Congestion is only available in tablet form. Patients are advised not to consume more tablets than is recommended in the patient information leaflet (PIL). Patients should not take this medicine if they are allergic to either fexofenadine or pseudoephedrine. Common side effects with Allegra-D 24 Hour Allergy & Congestion include dizziness, dry mouth, nausea, and insomnia.