Often physical addictions are reinforced by emotional and psychological needs. Filling or coming to terms with those needs can give you the inspiration and added freedom to succeed. Most of all, inform yourself, even if the information is disturbing. You are a lot less likely to be taken in by tobacco advertising once you know the facts. Nicotine, the active ingredient in tobacco smoke, has long been known to be highly addictive.
Physical addiction occurs when a chemical becomes essential for the body or metabolism to function.
In other words, a substance is said to be physically addictive if extended use results in a build up of tolerance in the body to the extent that discontinuing use of the substance results in negative side effects. It is to avoid these consequences that an addict will keep using his or her substance. Nicotine has been shown to have a negative effect on the heart and circulatory systems, causing a constriction in veins and arteries which may lead to a stroke or heart attack. In fact, nicotine is so poisonous that smokers who ignore their doctor's advice and continue to smoke while using dermal nicotine patches have managed to overdose and die of heart seizure. Many people think smoking marijuana is just as harmful as smoking tobacco, but this is not true.