The US Food and Drug Administration (FDA) has issued a warning about unapproved products that claim to help with opioid addiction and withdrawal.

Although the United States saw a decrease in the number of smokers in recent years, 38 million Americans still hadn't kicked the habit, according to the Centers for Disease Control and Prevention (CDC).

The number of women who take medication for attention deficit hyperactivity disorder (ADHD) has sharply increased in recent years, according to the Centers for Disease Control and Prevention (CDC).

Military veterans may be more likely to use tobacco than most other groups, according to a new study.

In recent years, the number of visits to United States emergency rooms for alcohol-related problems increased sharply, according to a new study.

Trying even one cigarette may lead to daily smoking, according to a new study.

Hormone therapy may prevent depression in women who are in the early stages of menopause, according to a new study.

Don't give up yet. Those healthy New Year's resolutions may help you reduce your cancer risk, according to the authors of a new study.

There's good news and bad news about how adolescents in the United States are using substances like nicotine, marijuana and opioids.

More than 6 million people in the United States may have Alzheimer's disease or mild cognitive impairment that can lead to the disease, according to a new study.