Online Allegra (Fexofenadine)
Respiratory & Allergy • Educational only; not medical advice. Prescriptions at clinician discretion.
Overview
Fexofenadine, sold as Allegra, is a second-generation, non-sedating antihistamine derived from terfenadine. It selectively blocks peripheral H₁-receptors, preventing histamine-induced allergy symptoms without significant central nervous system penetration.
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Dr. Annie Casta, M.D., FAAP
Pediatrics Specialist
Providing compassionate pediatric care, wellness exams, and preventive treatments for children and adolescents.
Learn MoreDr. Jorge Trapaga, ARNP
Family Medicine & Primary Care
Specializing in primary care, chronic disease management, and wellness services for adults and families.
Meet Dr. TrapagaUses
Relieves seasonal allergic rhinitis, chronic idiopathic urticaria, and nasal or ocular itching.Dosage & Administration
Adults: 60 mg twice daily or 180 mg once daily. Children 6–11 years: 30 mg twice daily. Take with water; avoid fruit juice, which may reduce absorption.Side Effects & Warnings
Headache, fatigue, and dry mouth are mild and transient. Unlike older antihistamines, it rarely causes sedation. Use cautiously in renal impairment.Patient Considerations
Best taken regularly during allergy season. Do not combine with other antihistamines unless directed.Ready for next steps?
FAQ
Can I take Allegra at night?
Yes, though it is usually non-drowsy and can be taken any time.
Does Allegra interact with food?
Avoid grapefruit or orange juice within two hours of dosing.
Is Allegra safe long-term?
Yes, it can be used daily for chronic allergy control.
Government / NIH sources
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