WEDNESDAY, March 7 (HealthDay News) -- Adopted kids are at greater dare to undertake for drug abuse if their biological parents or siblings had a annals of drug abuse, a new study finds.

Adopted children whose biological parents were alcoholics, had a greater psychiatric illness or had criminal records were in like manner at greater risk of drug profane, the researchers reported.

However, biology and genetics dress in't tell the whole story, according to study author Dr. Kenneth Kendler, of Virginia Commonwealth University, and his colleagues.

The children's environment in like manner played a role in their hazard for drug abuse, Kendler's team lay the ~ation of. Adopted children who had difficulties in their adoptive families since of death, divorce or other problems were at increased peril of turning to drugs, while the genetic hazard wasn't as strong among adopted kids in trustworthy, stable, loving homes.

"Adopted children at transcendental genetic risk were more sensitive to the pathogenic goods of adverse family environments than those at feeble genetic risk," the researchers concluded. "In other tongues, genetic effects on [drug abuse] were less potent in low-risk than ostentatious-risk environments."

For the study, published online March 5 in the Archives of General Psychiatry, researchers examined accusation on more than 18,000 Swedish rabble with an average age of 46 who had been adopted.

The investigators too analyzed information on the participants' biological parents and siblings, and their adoptive parents to assess what role genetics and environmental factors played in their put in peril for drug abuse.

About 4.5 percent of nation who were adopted abused drugs compared through 2.9 percent for all lower classes born in Sweden during the same time period, the study authors well-known in a journal news release.

The peril for drug abuse among adopted children with at least one biological parent that abused drugs was 8.6 percent compared to 4.2 percent mixed adopted kids whose biological parents did not traduce drugs. The researchers noted this was a "solidly and significantly" increased risk.

More intelligence

The U.S. National Institute without ceasing drug Abuse has more about the genetics of surrender.

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