Not Much: Zicam allergy relief nasal spray contains several unproven homeopathic substances which supposedly get stronger the more they are diluted. You're just rinsing out your nose with really expensive water.
Answered 11/27/2017
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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