Genes predict if medication can help you quit smoking

A new study shows the same gene variations that make it difficult to stop smoking also increase the likelihood that heavy smokers will respond to nicotine-replacement therapy and drugs that thwart cravings. The finding suggests it may one day be possible to predict which patients are most likely to benefit from drug treatments for nicotine addiction.

Gene variation makes alcoholism less likely in some survivors of sexual abuse

Exposure to severe stress early in life increases the risk of alcohol and drug addiction. Yet surprisingly, some adults sexually abused as children — and therefore at high risk for alcohol problems — carry gene variants that protect them from heavy drinking and its effects, according to researchers at Washington University School of Medicine in St. Louis.