Decongestants are commonly used over-the-counter medicines that help provide relief from nasal congestion caused by illnesses like the common cold or seasonal allergies. They work by constricting blood vessels in the nasal passages, which helps drainage and allows more air to pass through. https://logcla.com/blogs/380855/Choosing-the-Right-Decongestant-to-Get-Relief-from-Stuffy-Nose