A new study links spiritual or religious involvement to a significantly lower risk of harmful alcohol or drug use.

A new clinical trial finds people who smoke weed drink less alcohol – at least in the short term. But researchers say the findings are preliminary and the drug should not be used as a substitute for alcohol just yet.

A new study finds more than 1 in 5 young adults are using marijuana or alcohol to help them fall asleep.

A new study finds the risk of liver disease from heavy drinking has more than doubled in the U.S. -- even though alcohol intake has remained steady overall.

A new study suggests ovarian hormone fluctuations may contribute to alcohol craving and drinking.

Having 8 or more alcoholic drinks per week may damage areas of the brain linked to memory and thinking.