- A series of charts of American drug use — and abuse — give insight into marijuana experimentation and alcohol addiction, among other issues.
- Here's what you need to know about how performance-enhancing drugs work, and the risks they pose to users' health.
- Not sure how long an illegal drug may stay detectable in your system? We have the answer.
- Is sex addiction a real disease or an excuse for infidelity? What the neuroscience shows.
- New animal study suggests certain prescription painkillers do more harm than good.
- The Amy Winehouse Foundation opens women-only rehab facility to better address women's issues with substance recovery.
- CVS Pharmacy announces that its Texas chains will offer naloxone, an opioid overdose antidote, over the counter.
- Opium went from being a widely cultivated, traded, smoked, and used medically to a catalyst of drug addiction. Here's how.
- A new study investigates the brain changes that occur after a lifetime of drug abuse, finding it can seriously alter a user's decision-making skills.
- U.S. President Barack Obama will sign bill aimed at battling heroin addiction.
- A new study finds that recently released prisoners are at especially high risk of dying via a fatal drug overdose compared to the general public.
- New research looking at marijuana users finds that many use tobacco at the same time — a habit that might make quitting tobacco even harder.
Historically, addiction has been defined as physical and/or psychological dependence on psychoactive substances (for example alcohol, tobacco, heroin, caffeine and other drugs) which cross the blood-brain barrier once ingested, temporarily altering the chemical milieu of the brain.