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How do decongestants work to treat allergies?

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Decongestants are drugs that help shrink swollen nasal tissues and blood vessels that cause congestion, stuffy and runny nose, redness, and other symptoms. People often take decongestants along with another allergy medication called antihistamines. You should use decongestants that come in eye drops or nose spray for only a few days at a time to avoid making your symptoms worse. You can safely take pills and liquid decongestants for longer.

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 03, 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 03, 2017

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How do decongestants work to treat allergies?

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