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.
Frequently Asked Questions About Allergy Relief
What’s the right allergy treatment for you? Get answers from the experts to common questions.
Expert Advice on Handling Your Nasal Allergies
Learn what allergies cause hay fever and how to treat them.