Decongestants are drugs that decrease nasal congestion. Nasal decongestants can help with snoring, colds, and allergies. Side effects include nervousness, difficulty sleeping, and increased heart rate and an increase in blood pressure. Follow the links below to find WebMD's comprehensive coverage about how decongestants work, who needs them and why, and much more.
Decongestants and Antihistamines for the Common Cold
Learn more about decongestants and antihistamines -- and whether they'll relieve your cold symptoms.
Learn more about decongestants for allergy symptoms.
Expert Advice on Handling Your Nasal Allergies
Do you sneeze at certain times of the year or in all seasons? WebMD tells you how your allergies can be identified.
Allergy Relief: Antihistamines or Decongestants?
A guide to using decongestants and antihistamines for allergy relief.