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How are decongestants used to treat allergies?

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Decongestants relieve congestion and are often prescribed along with antihistamines for allergies. They can come in nasal spray, eye drop, liquid, or pill form. Nasal spray and eye drop decongestants should be used for only a few days at a time, because long-term use can actually make symptoms worse. Pills and liquid decongestants may be taken longer safely.

From: Allergy Medications WebMD Medical Reference

SOURCE: 

American Academy of Allergy, Asthma and Immunology.

FDA. News release.

Sanofi-aventis U.S. News release. 

UpToDate.com. “Patient information: Allergic rhinitis (seasonal allergies) (Beyond the Basics).”

Reviewed by Arefa Cassoobhoy on May 3, 2017

SOURCE: 

American Academy of Allergy, Asthma and Immunology.

FDA. News release.

Sanofi-aventis U.S. News release. 

UpToDate.com. “Patient information: Allergic rhinitis (seasonal allergies) (Beyond the Basics).”

Reviewed by Arefa Cassoobhoy on May 3, 2017

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How do decongestants work to treat allergies?

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