Addiction
Medical marijuana shows early promise to lessen opioid use.
Studying fly sex may lead to a better understanding of addiction in humans.
Illicit drug residues in sewage spiked for holidays and special events during summer 2017 in rural Kentucky.
The health benefits of a month without alcohol are unclear, and the British and Canadian medical authorities recommend several drink-free days per week.
A 12-year study of more than 1,000 people at one Boston hospital suggests a new way to alert emergency room doctors of underlying addiction.
Nicotine in the air and clothing permeates skin and enters the bloodstream at levels equivalent to inhalation of secondhand smoke.
New research builds case for a biological link between stimulant use and HIV onset.
Scientists could be getting close to identifying some of the genes that increase the risk of alcohol dependence.
How brain chemistry makes it hard to quit.