👉 A decongestant is a medication that helps to reduce congestion, which can be caused by symptoms such as sneezing, coughing, and nasal congestion. These medications are often used in the treatment of sinusitis or allergies, where they help to relieve the symptoms of these conditions. Decongestants work by blocking the release of mucus from the sinuses, allowing air to pass through more easily. They can also help to reduce inflammation in the nasal passages and improve blood flow to