About 20 million Americans suffer from substance abuse, and the overdose death rate keeps climbing.About 20 million Americans suffer from substance abuse, and the overdose death rate keeps climbing. In 2008, the number of deaths caused by a drug overdose was four times as many as those in 1999. Just one dose or hit of a drug can leave you addicted. It can also kill you, especially with the rise in dangerous drug mixing. Find out from Dr. Indra Cidambi the latest innovations in addiction prevention, including a pill that could block drug cravings. Bonus! 7 Normal—And Not-So-Normal—Signs of Aging