Tobacco is a hell of a drug. About 70 percent of smokers say they want to quit, according to the American Cancer Society, yet only four to seven percent of them actually do. There are many reasons a person gets addicted to tobacco, and it’s not only the nicotine. Some smoke to get rid of stress, while others do it in social situations — either way, it leads to the same outcome. The drug is so addicting, however, that even those who shouldn’t be smoking are doing just that. Such people include the ones in a new study, which found that trips to the pharmacy for a prescription drug refill were often accompanied by purchasing a pack of cigarettes.