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Allegra is used to relieve symptoms of seasonal allergic rhinitis (hay fever) and perennial allergic rhinitis, including sneezing, runny nose, itchy or watery eyes, and nasal congestion. It is also used to treat chronic idiopathic urticaria (hives).

Fexofenadine selectively blocks peripheral H1 histamine receptors. When allergens trigger the release of histamine in your body, Allegra prevents histamine from binding to those receptors and causing allergy symptoms.

Allegra is a second-generation antihistamine specifically designed to minimize sedation. It does not cross the blood-brain barrier well, so most patients experience little to no drowsiness compared with older antihistamines like diphenhydramine.

Most patients begin to notice symptom relief within one to three hours of taking a dose. Peak plasma concentrations are typically reached within two to three hours.

Fexofenadine is commonly used as a daily, long-term medication during allergy seasons or year-round for perennial symptoms. Your prescribing physician will advise on the appropriate duration based on your symptom pattern and response to treatment.

Fruit juices such as grapefruit, orange, and apple juice can reduce fexofenadine absorption by up to 36% and should not be taken with the medication. Antacids containing aluminum or magnesium hydroxide may also reduce absorption if taken at the same time. Let your provider know about all medications you are currently taking.

Doctronic uses an AI-powered evaluation to gather your symptoms and health history, which is then reviewed by a licensed physician. If appropriate, the physician creates a personalized treatment plan that may include a prescription, all without an in-person visit.

Yes. All evaluations are conducted by licensed physicians and are doctor-reviewed and audited for quality. Doctronic is fully HIPAA-compliant, and your health information is kept private and secure.