The reason for snorting any narcotic is because the fastest delivery of narcotics into one's bloodstream is through the nasal passageways. The drug are absorbed, the heart beat draws the chemical to the heart and then the next heart beats send it directly to the brain. Its similar to IV drug use which again places the chemical directly into the bloodstream and it travels equally as fast to the brain.
Ingesting a narcotic orally requires it to be broken down in the stomach and digestive tract. That is a much slower process and the release of chemicals into the bloodstream are more gradual and affected by how much food is in the stomach, The impact or "high" is less intnse. How fast or slow the digestive tract is working also influences the "high".
It is the immediate affect on the brain that users become addicted. The quicker a substance enters the blood and brain the more a user becomes compelled to recreate that sensation over and over again. Eventually, tolerance builds and it takes more and more of the substance to achieve the desired effect. That becomes the reason that people eventually overdose and die. It is a chronic, progressive and deadly disease. Ask anyone in recovery who is trying everyday to not give into a brain whose only message 24/7 is gimme, gimme, gimme. The sudden lack of the chemical(s) the brain has had a steady diet of leads to the symptoms of withdrawal. It can be a torturous, painful and frightening experience and not everyone survives it. Alcohol withdrawal can be fatal. Heroin or opiate withdrawal will seldom kill you but it will make you wish it had.
Does that make sense? Probably way more than you wanted to know. it is just something i happen to know and understand.
People snort Vicodin and other narcotics because of the effect it has on their physical body. Some people feel empowered or "high". Snorters love this feeling and it causes them to want the misuse the drug again. This is not a safe habit because every body reacts different to drugs.