Many people use nasal sprays to unblock their nose when they catch a cold. These can be highly effective, but few people know that they have addictive properties, too. Nasal sprays usually contain a chemical called xylometazoline, which makes the blood vessels of the mucous membranes contract. This contraction prevents the membranes from swelling, which helps unblock your nose. Unfortunately, however, the body grows used to this effect, and so you will need to use more of these sprays to achieve the same effect. Eventually, you would have to keep spraying throughout the day. Another downside is that quitting nasal sprays may cause your stuffy nose to return with a vengeance. This is why people find it hard to stop using nasal sprays. In fact, we would advise not using them in the first place. We prefer CBD Oil as a natural alternative, which works together with your body to stop inflammation and other symptoms of the cold.